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See detailA laboratory high-throughput glass chamber using dynamic headspace TDGC/ MS method for the analysis of whole Brassica napus L. plantlet volatiles under cadmium-related abiotic stress
Durenne, Bastien ULiege; Blondel, Alodie; Druart, Philippe et al

in Phytochemical Analysis (in press)

The dynamic headspace sampling technique using thermal desorption, gas chromatography and mass spectrometry (TD-GC/MS) is a powerful method for analysing plant emissions of volatile organic compounds ... [more ▼]

The dynamic headspace sampling technique using thermal desorption, gas chromatography and mass spectrometry (TD-GC/MS) is a powerful method for analysing plant emissions of volatile organic compounds (VOCs). The main purpose of this study was to set-up a laboratory high-throughput glass chamber for whole plant volatiles analysis. The trapping method produced reliable qualitative profiles of oilseed rape VOCs. Moreover, this inexpensive and non-invasive dynamic sampling technique has potential for wide application in sterile approach and replicated research. [less ▲]

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See detailHow flexible is the use of egocentric versus allocentric frame of reference in the Williams syndrome population?
Heiz, Julie; Majerus, Steve ULiege; Barisnikov, Koviljka

in Archives of Clinical Neuropsychology (in press)

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See detailDifferential contributions of default and dorsal attention networks to remembering thoughts and external stimuli from real-life events
Stawarczyk, David ULiege; Jeunehomme, Olivier ULiege; D'Argembeau, Arnaud ULiege

in Cerebral Cortex (in press)

Episodic memories are typically composed of perceptual information derived from the external environment and representations of internal states (e.g., one’s thoughts during prior episodes). To date ... [more ▼]

Episodic memories are typically composed of perceptual information derived from the external environment and representations of internal states (e.g., one’s thoughts during prior episodes). To date, however, research has mostly focused on the remembrance of external stimuli, such that little is known about how internal mentation is represented within episodic memory. In the present fMRI study, we examined the neural correlates of these two components of episodic memories using a novel method of cuing memories from photographs taken during real-life events. We found that, compared to corresponding semantic memory tasks, memories for internal thoughts and external elements were associated with activity in brain areas supporting episodic recollection. Most importantly, however, the two kinds of memories also showed differential activation in large-scale brain networks: the remembrance of external elements was associated with greater activity in the dorsal attention network, whereas memories of internal thoughts mainly recruited default network areas. These findings shed new light on the representation of internal and external aspects of prior experience within episodic memory. The default network may contribute to the reinstatement of thoughts experienced during past events, whereas the dorsal attention network may support the allocation of attention to visuo-spatial features within episodic memory representations. [less ▲]

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See detailEpidermodysplasia Verruciformis–like HPV infection of the Vulva in Immunosuppressed Women
Pohthipornthawat, Natkrita; Feldman, Sarah; Granter, Scott et al

in International Journal of Gynecological Pathology : Official Journal of the International Society of Gynecological Pathologists (in press)

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See detailDynamic force spectroscopy of synthetic oligorotaxane foldamers
Sluysmans, Damien ULiege; Devaux, Floriane ULiege; Bruns, Carson J. et al

in Proceedings of the National Academy of Sciences of the United States of America (in press)

Wholly synthetic molecules involving both mechanical bonds and a folded secondary structure are one of the most promising architec- tures for the design of functional molecular machines with un ... [more ▼]

Wholly synthetic molecules involving both mechanical bonds and a folded secondary structure are one of the most promising architec- tures for the design of functional molecular machines with un- precedented properties. Here, we report dynamic single-molecule force spectroscopy experiments that explore the energetic details of donor–acceptor oligorotaxane foldamers, a class of molecular switches. The mechanical breaking of the donor–acceptor interactions responsible for the folded structure shows a high constant rupture force over a broad range of loading rates, covering three orders of magnitude. In comparison with dynamic force spectroscopy performed during the past 20 y on various (bio)molecules, the near-equilibrium regime of oligorotaxanes persists at much higher loading rates, at which bio- molecules have reached their kinetic regime, illustrating the very fast dynamics and remarkable rebinding capabilities of the intramolecular donor–acceptor interactions. We focused on one single interaction at a time and probed the stochastic rupture and rebinding paths. Using the Crooks fluctuation theorem, we measured the mechanical work produced during the breaking and rebinding to determine a free- energy difference, ΔG, of 6 kcal·mol−1 between the two local confor- mations around a single bond. [less ▲]

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See detailComic strips et papier glacé. Rétro-réflexivité et pseudo-sérialité dans Little Tommy Lost
Crucifix, Benoît ULiege

in Recherches en Communication (in press)

Cet article examine la place du comic strip au sein du roman graphique contemporain à travers l'analyse de Little Tommy Lost (2013) de l'auteur américain Cole Closser. La particularité de cette œuvre ... [more ▼]

Cet article examine la place du comic strip au sein du roman graphique contemporain à travers l'analyse de Little Tommy Lost (2013) de l'auteur américain Cole Closser. La particularité de cette œuvre tient en ce qu'elle se propose comme un pastiche rigoureux de divers comic strips des années 1920 et 1930, allant jusqu'à se faire passer pour une collection d'anciens strips oubliés puis redécouverts. Little Tommy Lost creuse donc une vague "rétro-réflexive" qui interroge la façon dont la bande dessinée peut remédier ses propres identités culturelles. Il s'agira de cerner les enjeux stylistiques, sériels, narratifs et culturels d'une telle remédiation rétro-réflexive. [less ▲]

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See detailPD-L1 expression is regulated by both DNA methylation and NF-kB during EMT signaling in non-small cell lung carcinoma
Asgarova, Afag; Asgarov, Kamal; Godet, Yann et al

in Oncoimmunology (in press)

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See detailFamiliennamen zwischen Maas und Rhein
Möller, Robert ULiege

in Rheinische Vierteljahrsblätter (in press)

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See detailInfluence of a dynamic seating habit on lumbar control motor in schoolchildren
Fettweis, Tatiana ULiege; Onkelinx, Marie-Noëlle; Schwartz, Cédric ULiege et al

in Journal of Back and Musculoskeletal Rehabilitation (in press)

BACKGROUND: Adequate motor control is considered important for spinal stability and the prevention of low back pain in adulthood and in childhood. OBJECTIVE: Given that the sitting position can affect ... [more ▼]

BACKGROUND: Adequate motor control is considered important for spinal stability and the prevention of low back pain in adulthood and in childhood. OBJECTIVE: Given that the sitting position can affect proprioception, this study aimed to evaluate the influence of using at school a triangular and dynamic cushion on schoolchildren’s trunk motor control. METHODS: Thirty 8-year-old schoolchildren were randomized into a control group (n=15) and a “cushion group” (n=15), in which the children used the cushion for one year and a half. At the end of this period, a 3D-analysis was used to assess lumbar spine proprioception by means of a trunk repositioning task performed blindfolded in a seated position in two conditions (on a stable and on an unstable surface). RESULTS: The schoolchildren in the cushion group performed better at the trunk repositioning task (p=0.02) and hold their lumbar lordosis (p=0.03) better than the control children, in both conditions (stable and unstable). CONCLUSIONS: This preliminary study suggests that daily use of a triangular dynamic cushion has a beneficial impact on children’s lumbar proprioception. Further studies are needed to confirm these results and investigate the effectiveness of its use to prevent low back pain in adulthood. [less ▲]

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See detail‘Quality by Design’ approach for the analysis of impurities in pharmaceutical drug products and drug substances
Dispas, Amandine ULiege; Avohou, Tonakpon Hermane ULiege; Lebrun, Pierre ULiege et al

in Trends in Analytical Chemistry (in press)

The pharmaceutical industry is highly regulated by quality policies. The concept of risk management is strongly integrated into the quality assurance system to ensure pharmaceuticals’ quality and ... [more ▼]

The pharmaceutical industry is highly regulated by quality policies. The concept of risk management is strongly integrated into the quality assurance system to ensure pharmaceuticals’ quality and patients’ safety. In the context of quality control, the detection of impurities in raw materials and finished products is a major concern. It can be challenging for analytical scientists to meet specificity/selectivity and sensitivity requirements. Obviously, separation techniques are widely used for the detection of impurities but the method development required to achieve Analytical Target Profile (ATP) concerns is often challenging. Therefore, to ensure pragmatic and systematic methods development and simultaneously manage the risk associated with analytical methods, the principles of Quality by Design (QbD) should be applied. This paper provides an overview of QbD principles and statistical strategies (mainly DoE-DS approach) which can be applied to impurity detection methods, as well as a review of the literature where QbD has been applied to these types of analytical methods. [less ▲]

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See detailThe X-ray footprint of the CircumNuclear Disk
Mossoux, Enmanuelle ULiege; Eckart, Andreas

in Monthly Notices of the Royal Astronomical Society (in press)

We studied the central regions of the Galactic Centre to determine if the CircumNuclear Disk (CND) acts as an absorber or a barrier for the central X-rays diffuse emission. After reprocessing 4.6Ms of ... [more ▼]

We studied the central regions of the Galactic Centre to determine if the CircumNuclear Disk (CND) acts as an absorber or a barrier for the central X-rays diffuse emission. After reprocessing 4.6Ms of Chandra observations, we were able to detect, for the first time, a depression in the X-ray luminosity of the diffuse emission whose size and location correspond to those of the CND. We extracted the X-ray spectra for various regions inside the CND footprint as well as for the region where the footprint is observed and for a region located outside the footprint. We simultaneously fitted these spectra as an optically thin plasma whose absorption by the interstellar medium and by the local plasma were fitted independently using the MCMC method. The hydrogen column density of the ISM is 7.5x10^22 cm^-2. The X-ray diffuse emission inside the CND footprint is formed by a 2T plasma of 1 and 4keV with slightly super-solar abundances except for the iron and carbon which are sub-solar. The plasma from the CND, in turn, is better described by a 1T model with abundances and local hydrogen column density which are very different to those of the innermost regions. The large iron abundance in this region confirms that the CND is dominated by the shock-heated ejecta of the Sgr A East supernova remnant. We deduced that the CND rather acts as a barrier for the Galactic Centre plasma and that the plasma located outside the CND may correspond to the collimated outflow possibly created by Sgr A* or the interaction between the wind of massive stars and the mini-spiral material. [less ▲]

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See detailExperimental study of isolas in nonlinear systems featuring modal interactions
Detroux, Thibaut ULiege; Noël, Jean-Philippe ULiege; Virgin, Lawrence et al

in PLoS ONE (in press)

The objective of the present paper is to provide experimental evidence of isolated resonances in the frequency response of nonlinear mechanical systems. More specifically, this work explores the presence ... [more ▼]

The objective of the present paper is to provide experimental evidence of isolated resonances in the frequency response of nonlinear mechanical systems. More specifically, this work explores the presence of isolas, which are periodic solutions detached from the main frequency response, in the case of a nonlinear set-up consisting of two masses sliding on a horizontal guide. A careful experimental investigation of isolas is carried out using responses to swept-sine and stepped-sine excitations. The experimental findings are validated with advanced numerical simulations combining nonlinear modal analysis and bifurcation monitoring. In particular, the interactions between two nonlinear normal modes are shown to be responsible for the creation of the isolas. [less ▲]

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See detailNow we're free. De lichtheid van Leonard Cohen in You want it darker (2016)
Mus, Francis ULiege

in Passage, tijdschrift voor Europese literatuur en cultuur (in press)

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See detailL’activité éditoriale comme démarche de représentation de la connaissance: l’exemple de la ponctuation médiévale
Mazziotta, Nicolas ULiege

in Diachroniques: Revue de linguistique française diachronique (in press)

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See detailLa figuration de la prostituée comme rhétorique du pratico-inerte dans Salammbô
Schürgers, Elise ULiege; Franck, Thomas ULiege

in Revue Flaubert (in press), 16

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See detailAccentuated p53 staining in usual type vulvar dysplasia—A potential diagnostic pitfall
Jeffreys, Matthew; Jeffus, Susanne; Herfs, Michael ULiege et al

in Pathology Research and Practice (in press)

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See detailAntarctic environmental protection: strengthening the links between science and governance
Hughes, Kevin; Constable, Andrew; Frenot, Yves et al

in Environmental Science and Policy (in press)

The Antarctic has significant environmental, scientific, historic, and intrinsic values, all of which are worth protecting into the future. Nevertheless, the area is subject to an increasing level and ... [more ▼]

The Antarctic has significant environmental, scientific, historic, and intrinsic values, all of which are worth protecting into the future. Nevertheless, the area is subject to an increasing level and diversity of human activities that may impact these values within marine, terrestrial and cryosphere environments. Threats to the Antarctic environment, and to the aforementioned values, include climate change, pollution, habitat destruction, wildlife disturbance and non-native species introductions. Over time, a suite of legally binding international agreements, which form part of the Antarctic Treaty System (ATS), has been established to help safeguard the Antarctic environment and provide a framework for addressing the challenges arising from these threats. Foremost among these agreements are the Protocol on Environmental Protection to the Antarctic Treaty and the Convention on the Conservation of Antarctic Marine Living Resources. Many scientists working in Antarctica undertake research that is relevant to Antarctic environmental policy development. More effective two-way interaction between scientists and those responsible for policy development would further strengthen the governance framework, including by (a) better communication of policy makers’ priorities and identification of related science requirements and (b) better provision by scientists of ‘policy-ready’ information on existing priorities, emerging issues and scientific/technological advances relevant to environmental protection. The Scientific Committee on Antarctic Research (SCAR) has a long and successful record of summarizing policy-relevant scientific knowledge to policy makers, such as through its Group of Specialists on Environmental Affairs and Conservation (GOSEAC) up to 2002, currently the SCAR Standing Committee on the Antarctic Treaty System (SCATS) and recently through its involvement in the Antarctic Environments Portal. Improvements to science-policy communication mechanisms, combined with purposeful consideration of funding opportunities for policy-relevant science, would greatly enhance international policy development and protection of the Antarctic environment. [less ▲]

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See detailAgent-based Identification and Control of Voltage Emergency Situations
Robitzky, Lena; Weckesser, Tilman; Häger, Ulf et al

in IET Generation, Transmission & Distribution (in press)

Changing dynamics of power systems caused by the migration from conventional to distributed energy sources increase the risk of blackouts due to voltage instability, especially in case of unforeseen ... [more ▼]

Changing dynamics of power systems caused by the migration from conventional to distributed energy sources increase the risk of blackouts due to voltage instability, especially in case of unforeseen network conditions (e.g., (N-k)-cases). To enable a both secure and efficient power supply, novel monitoring and emergency control systems for the identification of voltage emergency situations as well as the execution of control actions are required that react reliably in due time and adaptively in case of changing network situations. This paper presents a distributed agent-based approach to counteract voltage instability that is based solely on local measurements and limited inter-agent communication. Distributed agents located at substations in the (sub-)transmission network monitor distribution and transmission voltages as well as load tap changer positions and are able to autonomously curtail load in case system stability is endangered. The applicability of the approach is demonstrated in a co-simulation environment interfacing the multi-agent system with a dynamic power system simulation. The presented approach allows for an early detection of voltage instability as well as a coordinated execution of available control actions. [less ▲]

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See detailSteady-State, Nonlinear Analysis of Large Arrays of Electrically Actuated Micromembranes Vibrating in a Fluid
Halbach, Alexandre ULiege; Geuzaine, Christophe ULiege

in Engineering with Computers (in press)

This paper describes a robust and efficient method to obtain the steady-state, nonlinear behaviour of large arrays of electrically actuated micromembranes vibrating in a fluid. The nonlinear ... [more ▼]

This paper describes a robust and efficient method to obtain the steady-state, nonlinear behaviour of large arrays of electrically actuated micromembranes vibrating in a fluid. The nonlinear electromechanical behavior and the multiple vibration harmonics it creates are fully taken into account thanks to a multiharmonic finite element formulation, generated automatically using symbolic calculation. A domain decomposition method allows to consider large arrays of micromembranes by efficiently distributing the computational cost on parallel computers. Two- and three- dimensional examples highlight the main properties of the proposed method. [less ▲]

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See detailThe current environmental levels of endocrine disruptors (mercury, cadmium, organochlorine pesticides and PCBs) in a Belgian adult population and their predictors of exposure
PIRARD, Catherine ULiege; Compere, Stéphanie; Firquet, Cathy et al

in International Journal of Hygiene and Environmental Health (in press)

A human biomonitoring study was carried out measuring the levels of endocrine disruptors in 252 participants (18-76 years old) recruited between February and May 2015 from the general population of Liege ... [more ▼]

A human biomonitoring study was carried out measuring the levels of endocrine disruptors in 252 participants (18-76 years old) recruited between February and May 2015 from the general population of Liege Province (Belgium). In this study, we reported the recent levels of cadmium and mercury in urine, some organochlorine pesticides and polychlorinated biphenyls (PCBs) in serum, and their relations to demographic characteristics, lifestyle behaviors and dietary habits. The median urinary levels of mercury and cadmium were 0.81 µg/l and <0.5µg/l respectively. The mercury levels were higher in participants having at least 3 dental amalgams, and consuming sea fish more than once a week. Although our mercury levels in most participants were lower than some health-based guidelines, they were higher than in our neighboring countries where ban or restrictions on the dental amalgams use were implemented. Urinary cadmium levels in current smokers were significantly higher than former or never smokers, as well as non-smokers for passively exposed vs non-exposed ones. Median PCB-153 and -180 serum levels were 53.8 and 41.1 ng/g lipid respectively, but PCB-138 was below the limit of quantification of 0.15 µg/l in 49% of the samples. Among the organochlorine pesticides, 4,4’-dichlorodiphenyldichloroethylene (4,4’-DDE), beta-hexachlorohexane and hexachlorobenzene were positively detected respectively in 48%, 49% and 37% of the serum samples. Eventhough, a dramatic decrease in organochlorines levels was observed, at least 1 pesticide or PCB was detected in 96% of our population, and more than 50% of our samples were contaminated by 4 or more organochlorines. Age, body mass index, and breastfeeding duration were the most predictive determinants of pesticide or PCB serum concentrations, but not dietary habits. [less ▲]

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See detailPhenotyping of Brassica napus L. plantlets affected during in vitro growth by the presence of epoxiconazole
Durenne, Bastien ULiege; Blondel, Alodie; Ducat, Nathalie et al

in Acta Horticulturae (in press)

Epoxiconazole like others triazole fungicides are known to be persistent in the soil. Several studies using foliar application experiments demonstrated the effect of its triazole metabolite as plant ... [more ▼]

Epoxiconazole like others triazole fungicides are known to be persistent in the soil. Several studies using foliar application experiments demonstrated the effect of its triazole metabolite as plant growth regulator through the anti-gibberellin activity. And notably, the reduction of Brassica napus L. growth can be attributed to the inhibition of gibberellin biosynthesis at the stage of conversion of ent-kaurene to ent-kaurenoic acid. We describe here an in vitro experiment studying the relationship between epoxiconazole in culture medium (0 mg L⁻¹, 0.120 mg L⁻¹ and 0.200 mg L⁻¹) and the phenotyping (root and shoot growth) of three varieties of winter rapeseeds (Brassica napus L. var. Catalina, var. ES Astrid and var. Toccata). Plantlets fungicide content was quantified using the QuEChERS extraction method following by an automated UHPLC-MS/MS analysis. Results showed that the shoots and roots growth of Brassica napus L. plantlets was significantly inhibited by epoxiconazole at 0.120 mg L⁻¹ independently of the variety. The concentration of 0.200 mg L⁻¹ leaded to necrosis and anthocyanosis symptoms and can be considered as lethal for in vitro growing explants. The huge epoxiconazole absorption by rapeseed plantlets clearly showed a dose-dependent relationship and was closely similar for the three varieties. [less ▲]

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See detailOrganometallic mediated radical polymerization of vinylidene fluoride
Banerjee, Sanjib; Ladmiral, Vincent; Debuigne, Antoine ULiege et al

in Angewante Chemie Intenational Edition (in press)

An unprecedented level of control for the radical polymerization of vinylidene fluoride (VDF), yielding well-defined PVDF (up to 14,500 g/mol) with low dispersity (≤1.32), was achieved using ... [more ▼]

An unprecedented level of control for the radical polymerization of vinylidene fluoride (VDF), yielding well-defined PVDF (up to 14,500 g/mol) with low dispersity (≤1.32), was achieved using organometallic mediated radical polymerization (OMRP) with an organocobalt compound as initiator. The high chain-end fidelity was demonstrated by the synthesis of PVDF- and PVAc-containing di-and tri-block copolymers. DFT calculations rationalize the efficient reactivation of both head and tail chain end dormant species. [less ▲]

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See detailIs oral feeding compatible with an unresponsive wakefulness syndrome?
MELOTTE, Evelyne ULiege; MAUDOUX, Audrey ULiege; DELHALLE, Sabrina ULiege et al

in Journal of Neurology (in press)

The aim of the study is to explore the possibility of oral feeding in unresponsive wakefulness syndrome/vegetative state (UWS/VS) patients. Method: We reviewed the clinical information of 68 UWS/VS ... [more ▼]

The aim of the study is to explore the possibility of oral feeding in unresponsive wakefulness syndrome/vegetative state (UWS/VS) patients. Method: We reviewed the clinical information of 68 UWS/VS patients (mean age 45 ± 11; range 16-79 years) searching for mention of oral feeding. UWS/VS diagnosis was made after repeated behavioural assessments using the Coma Recovery Scale–Revised. Patients also had complementary neuroimaging evaluations (positron emission tomography, functional magnetic resonance imaging and electroencephalography and diffusion tensor imaging). Results: Out of the 68 UWS/VS patients, only two could resume oral feeding (3%). The first patient had oral feeding (only liquid and semi liquid) in addition to gastrostomy feeding and the second one could achieve full oral feeding (liquid and mixed solid food). Clinical assessments concluded that they fulfilled the criteria for a diagnosis of UWS/VS. Results from neuroimaging and neurophysiology were typical for the first patient with regard to the diagnosis of UWS/VS but atypical for the second patient. Conclusion: Oral feeding that implies a full and complex oral phase could probably be considered as a sign of consciousness. However, we actually do not know which components are necessary to consider the swallowing conscious as compared to reflex. We also discussed the importance of swallowing assessment and management in all patients with altered state of consciousness. [less ▲]

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See detailCompte-rendu de l'ouvrage de Gilbert Gagné : The Trade and Culture Debate Evidence from US Trade Agreements
Vlassis, Antonios ULiege

in Revue Québecoise de Droit International (in press)

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See detailProtein folding at extreme temperatures: current issues
Feller, Georges ULiege

in Seminars in Cell & Developmental Biology (in press)

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See detailUse of multi-element stable isotope ratios to investigate ontogenetic movements of Micropogonias furnieri in a tropical Brazilian estuary
Pizzochero, Ana Carolina; Michel, Loïc ULiege; Chenery, Simon et al

in Canadian Journal of Fisheries & Aquatic Sciences (in press)

The whitemouth croaker, Micropogonias furnieri, is a long-lived fish of high commercial importance in the Western Atlantic Ocean. Here, we used stable isotope ratios of carbon, sulfur and nitrogen and ... [more ▼]

The whitemouth croaker, Micropogonias furnieri, is a long-lived fish of high commercial importance in the Western Atlantic Ocean. Here, we used stable isotope ratios of carbon, sulfur and nitrogen and isotopic niche metrics (SIBER) to study feeding habits and track habitat use by whitemouth croakers in Guanabara Bay, an estuary in Rio de Janeiro state, Brazil. Our results highlighted size-related habitat segregation, with small juvenile (< 30 cm) fishes residing mostly inside estuaries, while large adult (> 60 cm) fishes feed mainly in Continental Shelf (CS) waters. Medium adult fishes (30-60 cm) appear to feed in multiple coastal and CS habitats. Moreover, their feeding ecology showed strong temporal differences, linked with seasonal and, to a lesser extent, inter-annual variation in oceanographic features of the ecosystem in which they live. Overall, these differences in ecological features suggest that (1) adult and juvenile whitemouth croakers should be treated as different components of the food web and (2) the conservation of these habitats should be prioritized to better manage and sustain the coastal fisheries in Guanabara Bay. [less ▲]

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See detailCyclic and Fatigue Behaviour of Rock Materials: Review, Interpretation and Research Perspectives
Cerfontaine, Benjamin ULiege; Collin, Frédéric ULiege

in Rock Mechanics & Rock Engineering (in press)

The purpose of this paper is to provide a comprehensive state of the art of fatigue and cyclic loading of natural rock materials. Papers published in the literature are classified and listed in order to ... [more ▼]

The purpose of this paper is to provide a comprehensive state of the art of fatigue and cyclic loading of natural rock materials. Papers published in the literature are classified and listed in order to ease bibliographical review, to gather data (sometimes contradictory) on classical experimental results and to analyse the main interpretation concepts. Their advantages and limitations are discussed, and perspectives for further work are highlighted. The first section summarises and defines the different experimental set-ups (type of loading, type of experiment) already applied to cyclic/fatigue investigation of rock materials. The papers are then listed based on these different definitions. Typical results are highlighted in next section. Fatigue/cyclic loading mainly results in accumulation of plastic deformation and/or damage cycle after cycle. A sample cyclically loaded at constant amplitude finally leads to failure even if the peak load is lower than its monotonic strength. This subcritical crack is due to a diffuse microfracturing and decohesion of the rock structure. The third section reviews and comments the concepts used to interpret the results. The fatigue limit and S–N curves are the most common concepts used to describe fatigue experiments. Results published from all papers are gathered into a single figure to highlight the tendency. Predicting the monotonic peak strength of a sample is found to be critical in order to compute accurate S–N curves. Finally, open questions are listed to provide a state of the art of grey areas in the understanding of fatigue mechanisms and challenges for the future. [less ▲]

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See detailLe lettere bipartite e i discorsi politici di Francesco Guicciardini nell’anno 1525
Miesse, Hélène ULiege

in Giornale Storico della Letteratura Italiana (in press)

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See detailPsychological interventions influence patients' attitudes and beliefs about their chronic pain.
VANHAUDENHUYSE, Audrey ULiege; Gillet, Aline; MALAISE, Nicole ULiege et al

in Journal of Traditional and Complementary Medicine (in press)

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See detailIn Memoriam Paul Bruyère, 1958-2015
Marchandisse, Alain ULiege

in Bulletin de la Commission royale pour la publication des Anciennes Lois et Ordonnances de Belgique (in press)

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See detailThe use of a β-lactamase – based conductimetric biosensor assay to detect biomolecular interactions
Vandevenne, Marylène ULiege; Dondelinger, Mathieu; Yunus, Sami et al

in Journal of visualized experiments (in press)

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See detailQuality of life perception by inmates in the Central Prison of Mbuji-Mayi, Democratic Republique of Congo
Kalonji, Muasa Patoka ULiege; Okenge Ngongo, Leon; Ilunga Ilunga, Félicien et al

in International Journal of Medecal Research & Health Sciences (in press)

Summary Introduction: In developing countries, quality of prison life remains a challenge in public health. The present study aimed at determining the quality of life as perceived by inmates during their ... [more ▼]

Summary Introduction: In developing countries, quality of prison life remains a challenge in public health. The present study aimed at determining the quality of life as perceived by inmates during their imprisonment at the Central Prison of Mbuji-Mayi, Democratic Republic of Congo. Materials and Methods: This cross-sectional study was carried out over a 3-month period (between December 2015 and February 2016) at the Central Prison of Mbuji-Mayi. Three hundred inmates participated to the survey. The World Health Organisation Quality of Life Scale (WHOQOL-BREF) was used to estimate health and problems affecting inmates’ everyday life. Results: Mean age of inmates was 33 ± 10 years (range: 18-70 years) and most of them were male (88.7%). The quality of life score they estimated was below 50, on the WHOQOL-BREF scale weighted over 100 points (average overall score: 26±7). When considering each WHOQOL-BREF domain, the lowest scores (0-100 normalised scale) were registered for: perception of physical health (24±11), psychological health (18±8), social relationship (39±15) and environmental relationships (24±8). Overall, inmates aged over 30 years old presented an average score slightly lower than younger inmates (25±6 vs. 27±7; p=0.005). Depending on the length of incarceration, the average score was lower for inmates imprisoned for more than 6 months compared to others (26±6 vs. 28 ± 8; p= 0.015). Correlations between domain scores were low but statistically significant; no correlation was highlighted between environment and mental health domains. Conclusion: Most inmates considered their quality of life as negative, regardless of the WHOQOL-BREF domain. Efforts to improve quality of life should remain a priority for political authorities. [less ▲]

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See detailPsychopathologie et monde social : les limites de l'empathie et de la sympathie
Englebert, Jérôme ULiege

in Philosophie (in press)

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See detailSupplementation with 80,000 IU vitamin D3/month between November and April corrects vitamin D insufficiency without overdosing: Effect on serum 25-hydroxyvitamin D serum concentrations.
Tournier, Herve; Tran, Nicole; Dray, Nathalie et al

in Presse medicale (Paris, France : 1983) (in press)

INTRODUCTION: Vitamin D insufficiency, defined by a 25-hydroxyvitamin D (25OHD) serum concentration<20ng/mL, is highly frequent in the French general population, especially between November and April. The ... [more ▼]

INTRODUCTION: Vitamin D insufficiency, defined by a 25-hydroxyvitamin D (25OHD) serum concentration<20ng/mL, is highly frequent in the French general population, especially between November and April. The aim of this study was to evaluate whether 80,000 IU vitamin D3 every month during this period of the year was able to maintain a 25OHD level between 20 and 60ng/mL in apparently healthy subjects whatever their basal vitamin D status. METHODS: Ninety-eight subjects volunteered to receive an 80,000 IU vitamin D3 dose every month between November 2014 and April 2015. Serum 25OHD, calcemia and calciuria were measured just before the first dose (Month 0), just before the 4th dose (M4), and one month after the 6th dose (M7). RESULTS: At M0, 25OHD was 17.5+/-9.5ng/mL. Sixty subjects (61.2%) had a 25OHD<20ng/mL and 25 (25.5%) had a 25OHD<10ng/mL. 25OHD increased significantly at M4 (35.3+/-8.0ng/mL) and M7 (40.1+/-8.5) without change in calcemia and calciuria. At M4, 2 subjects had a 25OHD slightly below 20ng/mL (17.6 and 19.7ng/mL), and none had a concentration>60ng/mL. At M7, all had a serum 25OHD>20ng/mL and 2 subjects had a value slightly above 60ng/mL (62.1 and 63.2ng/mL). CONCLUSION: A monthly supplementation with 80,000 IU vitamin D3 between November and April corrected vitamin D insufficiency in subjects in whom it was initially very frequent, without overdosing. This protocol is simple, safe and costless, and can be easily implemented when physicians detect risk factors for hypovitaminosis D in patients for whom a 25OHD measurement is not indicated. [less ▲]

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See detailSynthetic oligorotaxanes exert high forces when folding under mechanical load
Sluysmans, Damien ULiege; Hubert, Sandrine ULiege; Bruns, Carson et al

in Nature Nanotechnology (in press)

Folding is a ubiquitous process that nature uses to control the conformations of its molecular machines, allowing them to perform chemical and mechanical tasks. Over the years, chemists have synthesized ... [more ▼]

Folding is a ubiquitous process that nature uses to control the conformations of its molecular machines, allowing them to perform chemical and mechanical tasks. Over the years, chemists have synthesized foldamers that adopt well-defined and stable folded architectures, mimicking the control expressed by natural systems. Mechanically interlocked molecules, such as rotaxanes and catenanes, are prototypical molecular machines that enable the controlled movement and positioning of their component parts. Recently, combining the exquisite complexity of these two classes of molecules, donor–acceptor oligorotaxane foldamers have been synthesized, in which interactions between the mechanically interlocked component parts dictate the single-molecule assembly into a folded secondary structure. Here we report on the mechanochemical properties of these molecules. We use atomic force microscopy-based single-molecule force spectroscopy to mechanically unfold oligorotaxanes, made of oligomeric dumbbells incorporating 1,5-dioxynaphthalene units encircled by cyclobis(paraquat-p-phenylene) rings. Real-time capture of fluctuations between unfolded and folded states reveals that the molecules exert forces of up to 50 pN against a mechanical load of up to 150 pN, and displays transition times of less than 10 μs. While the folding is at least as fast as that observed in proteins, it is remarkably more robust, thanks to the mechanically interlocked structure. Our results show that synthetic oligorotaxanes have the potential to exceed the performance of natural folding proteins. [less ▲]

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See detailEffect of flower traits and hosts on the abundance of parasitoids in perennial multiple species wildflower strips sown within oilseed rape (Brassica napus) crops
Hatt, Séverin ULiege; Uyttenbroeck, Roel ULiege; Chevalier Mendes Lopes, Thomas et al

in Arthropod-Plant Interactions (in press)

Reducing the use of insecticides is an important issue for agriculture today. Sowing wildflower strips along field margins or within crops represents a promising tool to support natural enemy populations ... [more ▼]

Reducing the use of insecticides is an important issue for agriculture today. Sowing wildflower strips along field margins or within crops represents a promising tool to support natural enemy populations in agricultural landscapes and, thus, enhance conservation biological control. However, it is important to sow appropriate flower species that attract natural enemies efficiently. The presence of prey and hosts may also guide natural enemies to wildflower strips, potentially preventing them from migrating into adjacent crops. Here, we assessed how seven flower traits, along with the abundance of pollen beetles (Meligethes spp., Coleoptera: Nitidulidae) and true weevils (Ceutorhynchus spp., Coleoptera: Curculionidae), affect the density of parasitoids of these two coleopterans in wildflower strips sown in an oilseed rape field in Gembloux (Belgium). Only flower traits, not host (i.e. pollen beetles and true weevils) abundance, significantly affected the density of parasitoids. Flower colour, ultraviolet reflectance and nectar availability were the main drivers affecting parasitoids. These results demonstrate how parasitoids of oilseed rape pests react to flower cues under field conditions. Similar analyses on the pests and natural enemies of other crops are expected to help to develop perennial flower mixtures able to enhance biological control throughout a rotation system. [less ▲]

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See detailConditions d’autonomisation et de capacitation des partenariats entre service public de l’emploi et opérateurs privés : Comparaison entre la Belgique et la Suisse francophone
Remy, Céline ULiege

in Schweizerische Zeitschrift für Soziologie (in press)

Conditions d’autonomisation et de capacitation des partenariats entre service public de l’emploi et opérateurs privés : Comparaison entre la Belgique et la Suisse francophone Résumé Cet article montre ce ... [more ▼]

Conditions d’autonomisation et de capacitation des partenariats entre service public de l’emploi et opérateurs privés : Comparaison entre la Belgique et la Suisse francophone Résumé Cet article montre ce qui se déroule en amont des collaborations entre les services publics de l’emploi et les opérateurs privés en charge de l’accompagnement des demandeurs d’emploi. Il met en évidence que les modalités de contractualisation et de gouvernance du partenariat influencent la confiance et, plus spécifiquement, la manière dont un partenariat s’autonomise et dont les prestataires acquièrent plus de capacités. Trois études de cas ont été menées au sein de partenariats dont deux en Belgique francophone et une en Suisse francophone. [less ▲]

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See detailObjet et pratiques sémiotiques : quelques enjeux médiatiques du support photographique
Honba Honba, Cédric ULiege

in Signata. Annales des Sémiotiques = Annals of Semiotics (in press)

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See detailThe law of attraction: identification of Volatiles Organic Compound emitted by potatoes as wireworm attractants
La Forgia, Diana ULiege; Verheggen, François ULiege

in Communications in Agricultural and Applied Biological Sciences (in press)

Wireworms (Coleoptera: Elateridae) are common polyphagous soil pests of various crops, including maize and potatoes, inflicting severe economic damage (Parker and Howard 2001). Their management with ... [more ▼]

Wireworms (Coleoptera: Elateridae) are common polyphagous soil pests of various crops, including maize and potatoes, inflicting severe economic damage (Parker and Howard 2001). Their management with pesticides is often not successful or sustainable and more research on biological alternatives is required. One of these alternatives could be the use of traps baited with attractive volatile organic compounds (VOCs) in association with a microbial control agent. In this paper, we describe the methodology followed to identify volatile organic molecules with potential as wireworms attractants. We previously observed that cut potato tubers place on the soil surface were highly attractive for wireworms. To identify the attractive cues released by potato tubers, we defined three specific objectives: 1) developing a behavioral assay suitable for the study of wireworm orientation behavior; 2) profiling VOCs released by potato tubers; 3) evaluating the role of the identified VOCs on wireworms foraging behavior. [less ▲]

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See detailPoly(N-methylvinylamine)-based copolymers for improved gene transfection
Dréan, Mathilde; Debuigne, Antoine ULiege; Jérôme, Christine ULiege et al

in Macromolecular Bioscience (in press)

Poly(N-methylvinylamines) with secondary amines can form complexes with plasmid DNA (pDNA) and provide transfection efficiency in HeLa cells in the same order as linear polyethyleneimine but with higher ... [more ▼]

Poly(N-methylvinylamines) with secondary amines can form complexes with plasmid DNA (pDNA) and provide transfection efficiency in HeLa cells in the same order as linear polyethyleneimine but with higher cell viability. Chemical modifications of poly(N-methylvinylamine) backbones are performed to further improve transfection efficiency while maintaining low degree of cytotoxicity. In a first type of polymer, primary amino groups are incorporated via a copolymerization strategy. In a second one, primary amino and imidazole groups are incorporated also via a copolymerization strategy. In a third one, secondary amino groups are substituted with methylguanidine functions through a postpolymerization reaction. Thus, novel polymers of various molecular masses are synthesized, characterized, and their interaction with pDNA studied. Then, their transfection efficiency and cytotoxicity are tested in HeLa cells. Two polymethylvinylamine-based copolymers, one containing 20% of imidazole moieties and another one composed of 12% of guanidinyl units allow remarkable transfection efficiency of HeLa, pulmonary (16HBE), skeletal muscle (C2C12), and dendritic (DC2.4) cells. Overall, this work thus identifies new promising DNA carriers and chemical modifications that improve the transfection efficiency while maintaining low degree of cytotoxicity. [less ▲]

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See detailBeliefs in the population about cracking sounds produced during spinal manipulation
Demoulin, Christophe ULiege; Baeri, Damien; TOUSSAINT, Geoffrey ULiege et al

in Joint Bone Spine (in press)

Objectives: To examine beliefs about cracking sounds heard during highvelocity lowamplitude (HVLA) thrust spinal manipulation in individuals with and without personal experience of this technique. Methods ... [more ▼]

Objectives: To examine beliefs about cracking sounds heard during highvelocity lowamplitude (HVLA) thrust spinal manipulation in individuals with and without personal experience of this technique. Methods: We included 100 individuals. Among them, 60 had no history of spinal manipulation, including 40whowereasymptomatic with or without a past history of spinal pain and 20whohad nonspecific spinal pain. The remaining 40 patients had a history of spinal manipulation;amongthem, 20 were asymptomatic and 20 had spinal pain. Participants attended a oneonone interview during which they completed a questionnaire about their history of spinal manipulation and their beliefs regarding sounds heard during spinal manipulation. Results: Mean age was 43.5±15.4 years. The sounds were ascribed to vertebral repositioning by 49% of participants and to friction between two vertebras by 23% of participants; only 9% of participants correctly ascribed the sound to the release of gas. The sound was mistakenly considered to indicate successful spinal manipulation by 40% of participants. No differences in beliefs were found between the groups with and without a history of spinal manipulation. Conclusions: Certain beliefs have documented adverse effects. This study showed a high prevalence of unfounded beliefs regarding spinal manipulation. These beliefs deserve greater attention from healthcare providers, particularly those who practice spinal manipulation. [less ▲]

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See detailBelgian and Swiss service providers faced with the challenge of jobseeker guidance. Predominance of stakeholder games or of the collaborative framework?
Remy, Céline ULiege

in International Review of Administrative Sciences (in press)

The public employment services have contracted out their jobseeker guidance role to service providers. The paper focuses on how the collaboration between the public services and private employment ... [more ▼]

The public employment services have contracted out their jobseeker guidance role to service providers. The paper focuses on how the collaboration between the public services and private employment operators is organised in Belgium and Switzerland. These partnerships have to contend with two challenges, which are the recruitment of candidates for training projects and the measurement of the results of the service. Our initial hypothesis supports the idea that stakeholder games are more effective in solving critical situations than the collaborative framework. The international comparison allows us to vary the partnership creation methods and to show a particular articulation between the stakeholder games and collaborative framework. [less ▲]

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See detailTyrannie du style et excès d'absurdités. La crack-fic comme art du "trop"
Lucca, Sian ULiege

in COnTEXTES (in press)

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See detailLa Banque centrale européenne et la crise des dettes souveraines : politique monétaire, politique économique ou état d’exception ?
Gregoire, Guillaume ULiege

in Revue internationale de droit économique (in press)

L’affaire Outright Monetary Transactions (OMT), qui a vu s’opposer le Tribunal constitutionnel fédéral allemand et la Cour de justice de l’Union européenne (CJUE) sur la question de la conformité au droit ... [more ▼]

L’affaire Outright Monetary Transactions (OMT), qui a vu s’opposer le Tribunal constitutionnel fédéral allemand et la Cour de justice de l’Union européenne (CJUE) sur la question de la conformité au droit de l’Union européenne de l’action de la Banque centrale européenne (BCE) lors de la crise des dettes souveraines de 2010-2012, constitue sans aucun doute, à ce jour, l’illustration la plus éclatante de la controverse relative à l’existence (ou non) d’une mutation constitutionnelle tacite du mandat de la BCE. Dans son arrêt du 21 juin 2016, le Tribunal constitutionnel fédéral confirme la conformité du programme monétaire OMT au droit de l’Union et à la Loi Fondamentale allemande mais n’en maintient pas moins de « sérieuses objections » à l’encontre du raisonnement de la CJUE, témoignant ainsi de la persistance de certaines tensions entre, d’une part, les interventions de la BCE et, d’autre part, les dispositions du Traité sur le fonctionnement de l’Union européenne (TFUE) relatives à ses compétences [less ▲]

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See detailThe Distribution of Spanish Books in Brussels during the 16th century
Adam, Renaud ULiege

in Quaerendo: A Journal Devoted to Manuscripts and Printed Books (in press)

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See detailMacroelement for Complete Shear Behaviour of Continuous Deep Girders
Liu, Jian ULiege; Mihaylov, Boyan ULiege

in ACI Structural and Materials Journals (in press)

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See detailLa tradition manuscrite de la « Post-Vulgate ». Histoire d’une diaspora textuelle
Morato, Nicola ULiege

in Revue de Linguistique Romane (in press)

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See detailThe Roles of Networks in Institutionalizing New Hybrid Organizational Forms: Insights from the European Renewable Energy Cooperative Network
Huybrechts, Benjamin ULiege; Haugh, Helen

in Organization Studies (in press)

Hybrid organizational forms combine values and practices from different institutional domains, rendering them difficult to fit neatly into the structures of extant organizational forms. Since the work ... [more ▼]

Hybrid organizational forms combine values and practices from different institutional domains, rendering them difficult to fit neatly into the structures of extant organizational forms. Since the work required to institutionalize a new hybrid organizational form may be beyond the resources and capabilities of individual organizations acting alone, we shift the focus to inter-organizational collective action. Using empirical data from a study of a European network of renewable energy cooperatives, we find that, in order to institutionalize the new hybrid organizational form, the network can contribute to overcome the legitimacy challenges inherent in organizational hybridity. In particular, the network builds field-level receptivity to institutional pluralism, collectively codifies the hybrid organizational form, and consolidates legitimation towards plural field-level audiences. In order to perform these institutionalization roles, the network itself becomes increasingly formalized and mobilizes mediating functions involving different types of resources, legitimacy and target audiences. The research advances knowledge of hybrid organizational forms and their collective institutionalization through inter-organizational networks. [less ▲]

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See detailA Nineteenth-Century National Prussian Macroseismic Questionnaire
Knuts, Elisabeth ULiege; Hinzen, K-H; Reamer, S.K. et al

in Seismological Research Letters (in press)

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See detailWas there a Roman Linguistic Imperialism during the Republic and the early Principate
Rochette, Bruno ULiege

in Lingue e Linguaggio (in press)

One of the main consequences of the Roman conquest was the diffusion of the Latin language and of Roman culture throughout the conquered countries. According to many texts of the imperial period, Latin ... [more ▼]

One of the main consequences of the Roman conquest was the diffusion of the Latin language and of Roman culture throughout the conquered countries. According to many texts of the imperial period, Latin became a universal language during the Imperium Romanum. But what is the reality? Did Rome develop any linguistic policies? There is some evidence to show that Rome’s response regarding the sociolinguistic problems that arose under its rule was to be flexible and willing to adapt to the specific requirements of each situation. Under the Republic and the early Principate, there was, in fact, a great flexibility in language use by the Romans in their dealings with the Greek world. Even though Latin-Greek bilingualism was widespread among the Romans of the Republic and the early Principate, in the public context, Latin maintained a high-level role because it represented the language of Rome’s power. In spite of this flexible approach to language use, a natural competition developed between the language of the dominant and the language of the dominated. In the Occident, Latin became the only vehicle of communication, both oral and written, whereas in the Orient, one notes a paradoxical situation: the Hellenization of the Romans due to the high cultural position of the Greek language. However, this dichotomy did not produce a division of the Roman Empire into two impenetrable parts, closed to mutual linguistic and cultural influences, but rather, it generated a more complicated situation, especially in the Oriental part of the Empire. It is this situation that will be analyzed in the present paper. [less ▲]

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See detailFace à l'incertitude : la cristallisation des réseaux par les comédiens entrepreneurs
Pirard, Julie; Dufays, Frédéric; Xhauflair, Virginie ULiege

in Revue de l'Entrepreneuriat (in press)

A l’instar de l’action entrepreneuriale, la carrière de comédien est empreinte d’incertitude. Cet article examine comment les comédiens cristallisent leurs réseaux socio-professionnels pour réduire cette ... [more ▼]

A l’instar de l’action entrepreneuriale, la carrière de comédien est empreinte d’incertitude. Cet article examine comment les comédiens cristallisent leurs réseaux socio-professionnels pour réduire cette incertitude. L’analyse du parcours de quatre comédiens entrepreneurs révèle trois modulations de cristallisation – cristallisations et décristallisations successives, cristallisation d’un collectif ou d’une équipe, et cristallisation du réseau de partenaires – qui sont utilisées tantôt successivement, tantôt en combinaison. Ces cristallisations prennent forme autour d’une diversité d’éléments cristallisateurs, dépassant une vision exclusivement centrée sur un projet ou une personne. Ces résultats enrichissent le modèle réticulaire de création organisationnelle de Larson et Starr (1993), lui donnant un caractère plus systémique, et contribuent à la compréhension des processus d’insertion socio-professionnelle des artistes grâce au prisme de l’entrepreneuriat. [less ▲]

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See detailClash of Chemists: A gamified blog to master the concept of limiting reagent stoichiometry
le Maire, Nathalie ULiege; Verpoorten, Dominique ULiege; Fauconnier, Marie-Laure ULiege et al

in Journal of Chemical Education (in press)

In a first-year university course, students experienced a new learning activity (“Clash of Chemists”) prompting them to create and share personal analogies explaining the difference between stoichiometric ... [more ▼]

In a first-year university course, students experienced a new learning activity (“Clash of Chemists”) prompting them to create and share personal analogies explaining the difference between stoichiometric and non-stoichiometric reaction conditions, also known in literature as "limiting reagent stoichiometry". To support students’ commitment to this unusual assignment, the instructional design drew on a blog enriched with game mechanics (tournament, video rewards, and leaderboard), as found in popular mini-games. The paper reports on the activity’s outputs and on participants’ perceptions of its usability, usefulness and generated satisfaction. Overall students’ reception of this mini-game was positive. A significant difference between players and non-players’ end-of-term exam results was highlighted. [less ▲]

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See detailKings and Elites in an Intercultural Tradition: From Diodorus to the Egyptian Temples
Caneva, Stefano ULiege

in Greece and Rome (in press), 65

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See detailEurocentrism and Modernism of International Law. The ‘ouverture’ to Eastern and Latin America (1860-1920)
Genin, Vincent ULiege

in Monde(s), histoires, espaces, relations (2018), (2),

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See detailRotational and continuous grazing does not affect the total net ecosystem exchange of a pasture grazed by cattle but modifies CO2 exchange dynamics
Gourlez de la Motte, Louis ULiege; Mamadou, Ossenatou; Beckers, Yves ULiege et al

in Agriculture, Ecosystems & Environment (2018), 253

Grassland carbon budgets are known to be greatly dependent on management. In particular, grazing is known to directly affect CO2 exchange through consumption by plants, cattle respiration, natural ... [more ▼]

Grassland carbon budgets are known to be greatly dependent on management. In particular, grazing is known to directly affect CO2 exchange through consumption by plants, cattle respiration, natural fertilisation through excreta, and soil compaction. This study investigates the impact of two grazing methods on the net ecosystem exchange (NEE) dynamics and carbon balance, by measuring CO2 fluxes using eddy covariance in two adjacent pastures located in southern Belgium during a complete grazing season. Rotational (RG) grazing consists of an alternation of rest periods and short high stock density grazing periods. Continuous grazing (CG) consists of uninterrupted grazing with variable stocking rates. To our knowledge, this is the first study to assess the impact of these grazing methods on total net ecosystem exchange and CO2 exchange dynamics using eddy covariance. The results showed that NEE dynamics were greatly impacted by the grazing method. Following grazing events on the RG parcel, net CO2 uptake on the RG parcel was reduced compared to the CG parcel. During the following rest periods, this phenomenon progressively shifted towards a higher assimilation for the RG treatment. This behaviour was attributed to sharp biomass changes in the RG treatment and therefore sharp changes in plant photosynthetic capacity. We found that differences in gross primary productivity at high radiation were strongly correlated to differences in standing biomass. In terms of carbon budgets, no significant difference was observed between the two treatments, neither in cumulative NEE, or in terms of estimated biomass production. The results of our study suggest that we should not expect major benefits in terms of CO2 uptake from rotational grazing management when compared to continuous grazing management in intensively managed temperate pastures. [less ▲]

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See detailDecentralized Model Predictive Control of Voltage Source Converters for AC Frequency Containment
Papangelis, Lampros ULiege; Debry, Marie-Sophie; Prevost, Thibault et al

in International Journal of Electrical Power & Energy Systems (2018), 98

This paper presents a novel control scheme for exchange of frequency support between asynchronous AC systems through a High Voltage Direct Current link or grid. The proposed controller bears the spirit of ... [more ▼]

This paper presents a novel control scheme for exchange of frequency support between asynchronous AC systems through a High Voltage Direct Current link or grid. The proposed controller bears the spirit of an emergency scheme. Using only locally available measurements, each converter can identify emergency situations that could potentially lead to unacceptable frequency values. Then appropriate control actions are taken to restrain the frequency decline and prevent it from reaching the thresholds of load shedding relays. Inspired of Model Predictive Control, the method uses simplified models of the AC and DC sides of the converter, and can incorporate various constraints. The effectiveness of the method is demonstrated on a test system consisting of two asynchronous AC areas interconnected through a five-terminal HVDC grid. [less ▲]

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See detailBecoming relatively relativists: engaging with truth in the case of genomics
Thoreau, François ULiege; Delvenne, Pierre ULiege

in Engaging Science, Technology, and Society (2018)

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See detailLa importación literaria a finales del siglo XIX en Colombia: el caso de José Asunción Silva
Mogollon Zapata, Juan Manuel ULiege

in Estudios de literatura colombiana (2018), 42

The analysis of the of Silva’s collection of works places us in quite a disconcerting, yet no less encouraging, position, when re-assessing the different forms of importing literary movements. On one hand ... [more ▼]

The analysis of the of Silva’s collection of works places us in quite a disconcerting, yet no less encouraging, position, when re-assessing the different forms of importing literary movements. On one hand, the image attributed to Silva both by his contemporaries and his successors is that of the leading figure in the assimilation and absorption of the literary European movements that would give rise to modernism. On the other hand, the absence of public visibility for Silva’s works, be it through texts or paratexts, let us in a difficult situation to prove the poet’s will to position himself as the one who introduced the new literary movement to Colombia. If we accept from the outset, as we will in this article, that the Colombian poet possessed an obstinate determination to appropriate and assimilate the European literary movements that give rise to modernism, then we must entertain the possibility that Silva’s literary transfer took place through media other than books, journals or magazines. Our hypothesis is that by focusing on the acts of reading and poise, the literary coterie became the ideal platform for the Colombian writer to adopt and propagate the image of the decadent writer, which would become the embodiment of the aesthetic ideals of modern literature. [less ▲]

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See detailInfluence of urban pattern on inundation flow in floodplains of lowland rivers
Bruwier, Martin ULiege; Mustafa, Ahmed Mohamed El Saeid ULiege; Aliaga, Daniel G. et al

in Science of the Total Environment (2018), 622–623

The objective of this paper is to investigate the respective influence of various urban pattern characteristics on inundation flow. A set of 2,000 synthetic urban patterns were generated using an urban ... [more ▼]

The objective of this paper is to investigate the respective influence of various urban pattern characteristics on inundation flow. A set of 2,000 synthetic urban patterns were generated using an urban procedural model providing locations and shapes of streets and buildings over a square domain of 1 x 1 km². Steady two-dimensional hydraulic computations were performed over the 2,000 urban patterns with identical hydraulic boundary conditions. To run such a large amount of simulations, the computational efficiency of the hydraulic model was improved by using an anisotropic porosity model. This model computes on relatively coarse computational cells, but preserves information from the detailed topographic data through porosity parameters. Relationships between urban characteristics and the computed inundation water depths have been based on multiple linear regressions. Finally, a simple mechanistic model based on two district-scale porosity parameters, combining several urban characteristics, is shown to capture satisfactorily the influence of urban characteristics on inundation water depths. The findings of this study give guidelines for more flood-resilient urban planning. [less ▲]

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See detailParameter reduction in nonlinear state-space identification of hysteresis
Esfahani, Alireza; Dreesen, Philippe; Tiels, Koen et al

in Mechanical Systems & Signal Processing (2018), 104

Recent work on black-box polynomial nonlinear state-space modeling for hysteresis identification has provided promising results, but struggles with a large number of parameters due to the use of ... [more ▼]

Recent work on black-box polynomial nonlinear state-space modeling for hysteresis identification has provided promising results, but struggles with a large number of parameters due to the use of multivariate polynomials. This drawback is tackled in the current paper by applying a decoupling approach that results in a more parsimonious representation involving univariate polynomials. This work is carried out numerically on input-output data generated by a Bouc-Wen hysteretic model and follows up on earlier work of the authors. The current article discusses the polynomial decoupling approach and explores the selection of the number of univariate polynomials with the polynomial degree. We have found that the presented decoupling approach is able to reduce the number of parameters of the full nonlinear model up to about 50%, while maintaining a comparable output error level. [less ▲]

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See detailBruno Latour et la sémiotique de l’énonciation : fondements et évolutions
Dondero, Maria Giulia ULiege

in Symposium Revue canadienne de philosophie continentale (2018)

Cet article vise à retracer les relations entre les travaux de Bruno Latour et la sémiotique d’Algirdas Julien Greimas et du groupe de chercheurs de l’« École de Paris ». Ces rapports remontent à la fin ... [more ▼]

Cet article vise à retracer les relations entre les travaux de Bruno Latour et la sémiotique d’Algirdas Julien Greimas et du groupe de chercheurs de l’« École de Paris ». Ces rapports remontent à la fin des années 1970 lors de la collaboration entre le philosophe de sciences et Françoise Bastide ainsi que Paolo Fabbri sur la construction discursive de la référence dans les textes scientifiques . Ce sont notamment la notion d’actantialité et la notion d’énonciation que Latour emprunte à la sémiotique greimassienne. Si l’actantialité a déjà été étudiée pour rendre compte de la théorie de l’acteur-réseau, cet article se consacre aux évolutions de la théorie de l’énonciation, des premiers écrits de l’auteur, notamment « A Relativistic Account of Einstein’s Relativity » de 1988, en passant par « Petite philosophie de l’énonciation » de 1998 pour évaluer ensuite les propositions contenues dans l’ "Enquête sur les Modes d’Existence" de 2012 . [less ▲]

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See detailA mass spectrometry method for sensitive, specific and simultaneous detection of bovine blood meal, blood products and milk products in compound feed
Lecrenier, Marie-Caroline ULiege; Planque, Mélanie; Dieu, Marc et al

in Food Chemistry (2018), 245

Feed sustainability is one of the biggest challenges for the next few years. Solutions have to be found that take feed quality and safety into account. Animal by-products are one valuable source of ... [more ▼]

Feed sustainability is one of the biggest challenges for the next few years. Solutions have to be found that take feed quality and safety into account. Animal by-products are one valuable source of proteins. However, since the bovine spongiform encephalopathy (BSE) crisis, their use has been strictly regulated. The objective of this study was to propose a routine, sensitive and specific method using ultra-high performance liquid chromatography coupled to tandem mass spectrometry for the detection of blood-derived products and milk powder in feed. Contaminated aquafeeds were analysed in order to evaluate the sensitivity and specificity of the method. This new method meets both selectivity and sensitivity (0.1% (w/w)) requirements imposed by the European Commission for animal proteins detection methods. It offers an innovative and complementary solution for the simultaneously identification of authorised and unauthorised animal by-products such as processed animal proteins (PAPs). [less ▲]

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See detailContinuous roll forming including in-line welding and post-cut within an ALE formalism
Crutzen, Yanick ULiege; Boman, Romain ULiege; Papeleux, Luc ULiege et al

in Finite Elements in Analysis and Design (2018), 143

Cold roll forming is a rather old process for which there is a renewed interest due to its capacity to form ultra high-strength steels. For the first time ever in the literature, the manufacturing chain ... [more ▼]

Cold roll forming is a rather old process for which there is a renewed interest due to its capacity to form ultra high-strength steels. For the first time ever in the literature, the manufacturing chain involving both the continuous cold roll-forming process, the in-line welding operation for closed sections and the post-cut operation is numerically modelled. The first phase of this process sequence consists in computing the hopefully steady state configuration of the strip for the total length of the roll-forming mill, including the in-line welding phase. For addressing this problem, the Arbitrary Lagrangian Eulerian (ALE) formalism is used. Once the ALE steady state is reached, the computation is pursued with a second Lagrangian phase which is aimed at simulating the post-cut operation that releases the formed section from the rolling tools of the mill, enabling to determine the final geometry of the product. In this paper, the computational modelling framework employed within the in-house finite element code METAFOR is described. In particular, the proposed techniques — which are definitely original within an ALE formalism — for modelling the in-line welding operation and the post-cut operation are extensively detailed. The welding is considered with three different methods: (1) symmetry boundary conditions coupled with a well-suited node relocation procedure, (2) a closed mesh of the closed section coupled with a well-suited node relocation procedure, and (3) sticking elements based on a spring constitutive formulation. A set of simple numerical examples demonstrates the confidence in all the proposed modelling methods. Finally, these methods are successfully applied in the cases of two complex roll-forming mills of closed tubular sections. [less ▲]

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See detailNew polarimetric and spectroscopic evidence of anomalous enrichment in spinel-bearing calcium-aluminium-rich inclusions among L-type asteroids
Devogele, Maxime ULiege; Tanga, P.; Cellino, A. et al

in Icarus (2018), 304

Asteroids can be classified into several groups based on their spectral reflectance. Among these groups, the one belonging to the L-class in the taxonomic classification based on visible and near-infrared ... [more ▼]

Asteroids can be classified into several groups based on their spectral reflectance. Among these groups, the one belonging to the L-class in the taxonomic classification based on visible and near-infrared spectra exhibit several peculiar properties. First, their near-infrared spectrum is characterized by a strong absorption band interpreted as the diagnostic of a high content of the FeO bearing spinel mineral. This mineral is one of the main constituents of Calcium-Aluminum-rich Inclusions (CAI) the oldest mineral compounds found in the solar system. In polarimetry, they possess an uncommonly large value of the inversion angle incompatible with all known asteroid belonging to other taxonomical classes. Asteroids found to possess such a high inversion angle are commonly called Barbarians based on the first asteroid on which this property was first identified, (234) Barbara. In this paper we present the results of an extensive campaign of polarimetric and spectroscopic observations of L-class objects. We have derived phase-polarization curves for a sample of 7 Barbarians, finding a variety of inversion angles ranging between 25 and 30°. Spectral reflectance data exhibit variations in terms of spectral slope and absorption features in the near-infrared. We analyzed these data using a Hapke model to obtain some inferences about the relative abundance of CAI and other mineral compounds. By combining spectroscopic and polarimetric results, we find evidence that the polarimetric inversion angle is directly correlated with the presence of CAI, and the peculiar polarimetric properties of Barbarians are primarily a consequence of their anomalous composition. © 2017. [less ▲]

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See detailDevelopment of a non-toxic and non-denaturing formulation process for encapsulation of SDF-1α into PLGA/PEG-PLGA nanoparticles to achieve sustained release
Haji Mansor, Muhammad; Najberg, Mathie; Contini, Aurélien et al

in European Journal of Pharmaceutics & Biopharmaceutics (2018), 125

Chemokines are known to stimulate directed migration of cancer cells. Therefore, the strategy involving gradual chemokine release from polymeric vehicles for trapping cancer cells is of interest. In this ... [more ▼]

Chemokines are known to stimulate directed migration of cancer cells. Therefore, the strategy involving gradual chemokine release from polymeric vehicles for trapping cancer cells is of interest. In this work, the chemokine stromal cell-derived factor-1α (SDF-1α) was encapsulated into nanoparticles composed of poly-(lactic-co-glycolic acid) (PLGA) and a polyethylene glycol (PEG)-PLGA co-polymer to achieve sustained release. SDF-1α and lysozyme as a model protein, were firstly precipitated to promote their stability upon encapsulation. A novel phase separation method utilising a non-toxic solvent in the form of isosorbide dimethyl ether was developed for the individual encapsulation of SDF-1α and lysozyme precipitates. Uniform nanoparticles of 200–250 nm in size with spherical morphologies were successfully synthesised under mild formulation conditions and conveniently freeze-dried in the presence of hydroxypropyl-β-cyclodextrin as a stabiliser. The effect of PLGA carboxylic acid terminal capping on protein encapsulation efficiency and release rate was also explored. Following optimisation, sustained release of SDF-1α was achieved over a period of 72 h. Importantly, the novel encapsulation process was found to induce negligible protein denaturation. The obtained SDF-1α nanocarriers may be subsequently incorporated within a hydrogel or other scaffolds to establish a chemokine concentration gradient for the trapping of glioblastoma cells. © 2017 Elsevier B.V. [less ▲]

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See detailRelic charcoal hearth soils: A neglected carbon reservoir. Case study at Marsiliana forest, Central Italy
Mastrolonardo, Giovanni ULiege; Francioso, Ornella; Certini, Giacomo

in Geoderma (2018), 315

Charcoal production in forests is one of the oldest forms of forest exploitation. The legacy of such once widespread activity is a plethora of relic charcoal hearths (RCHs1), where soil shows a thick ... [more ▼]

Charcoal production in forests is one of the oldest forms of forest exploitation. The legacy of such once widespread activity is a plethora of relic charcoal hearths (RCHs1), where soil shows a thick, black, charcoal-rich top horizon. Even where very common, such as in European forests, RCHs were rarely studied to assess their relevance as C reservoir. For this purpose, as a case study, we investigated some RCHs at Marsiliana, a typical Mediterranean oak forest from Central Italy. We found that RCHs soils, in spite of representing < 0.5% of total surface, gave a substantial contribution in terms of C, i.e. 1.1% to 4.2% of total ecosystem C, including litter, the top 30 cm of soil, deadwood, above-ground and below-ground biomass. On average, soil C content in RCHs was eight times higher than the soil outside the RCHs. The environmental significance of RCHs soils appears still greater considering that, on average, 43% of their C stock was charcoal, a form of C highly recalcitrant to mineralization. These results would stress the importance of accounting for the contribution of RCHs in terms of soil C and giving an estimation of their charcoal content in future C inventories, both as macroscopic and microscopic particles in soil. This study support the necessity of safeguarding the anthropogenic soils of RCHs as a precious C reservoir as well as a memory of past land uses. [less ▲]

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See detailContinuous-porous N-doped carbon network as high-performance electrode for lithium-ion batteries
Alkarmo, Walid ULiege; Ouhib, Farid ULiege; Aqil, Abdelhafid ULiege et al

in Journal of Materials Science (2018), 53(8), 6135-6146

Hierarchical porous N-doped carbon (NPC) is prepared by pyrolysis of poly(- methyl methacrylate) (PMMA) particles decorated by graphene oxide (GO) and polypyrrole (PPy) as precursors and used as anode for ... [more ▼]

Hierarchical porous N-doped carbon (NPC) is prepared by pyrolysis of poly(- methyl methacrylate) (PMMA) particles decorated by graphene oxide (GO) and polypyrrole (PPy) as precursors and used as anode for lithium-ion batteries. The composite precursors with different diameter and composition (PMMA/GO/ PPy-A and B) were conveniently prepared by dispersion polymerization of methyl methacrylate in the presence of graphene oxide as stabilizer in aqueous medium, followed by addition of pyrrole and its oxidative polymerization. After pyrolysis, the resulting NPC composites with hierarchically structured macro- and mesopores exhibit high surface area (289–398 m2/g) and different N-doping levels (7.46 and 4.22 wt% of nitrogen content). The NPC with the highest N-doping level (7.46 wt%) shows high reversible capacities of 831 mAh/g at 74.4 mA/g (C/5) after 50 cycles and excellent rate performances. [less ▲]

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See detailLe droit de l’Union européenne ne se prête-t-il pas (encore) à l’ubérisation des services?
Van Cleynenbreugel, Pieter ULiege

in Revue de la Faculté de droit de l'Université de Liège (2018), (1),

This article offers a commentary on the Court's Elite Taxi judgment, in which it held that the application Uber is to be considered as offering a transport service when it connects drivers and clients ... [more ▼]

This article offers a commentary on the Court's Elite Taxi judgment, in which it held that the application Uber is to be considered as offering a transport service when it connects drivers and clients through its UberPOP application. [less ▲]

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See detailA situated expert judgment: QSAR models and transparency in the European regulation of chemicals
Thoreau, François ULiege; Laurent, Brice

in Science & Technology Studies (2018)

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See detailDissolved Si export: Impact of increased water fluxes through soil
Ronchi, Bénédicta; Dassargues, Alain ULiege; Batelaan, Okke

in Geoderma (2018), 312

Intense deforestation over large areas is an important component of global models which aim to quantify the transfer of terrestrial siliceous material from the continent to the coast. Hence, there is a ... [more ▼]

Intense deforestation over large areas is an important component of global models which aim to quantify the transfer of terrestrial siliceous material from the continent to the coast. Hence, there is a need for improved understanding of land use impact on Si export. We present a model that simulates the kinetic dissolution of biogenic Si in a forest soil. A kinetic equation was calibrated based on leaching experiments of soil columns at constant water flux. The calibrated equation was then used to simulate the Si export from a forest soil under varying atmospheric conditions and provided realistic Si concentrations in soil water. The same model was used to simulate the impact of reduced evapotranspiration due to deforestation and consequently increased soil water fluxes on the Si export. Results showed that lower amounts of biogenic silicon dissolved and higher Si fluxes were released to the system once water flux increased. The use of the kinetic dissolution equation for biogenic Si improves our understanding and the modelling of the Si release from soils towards the hydrographic system. [less ▲]

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See detailCharge-sensitive modelling of organic Rankine cycle power systems for off-design performance simulation
Dickes, Rémi ULiege; Dumont, Olivier ULiege; Guillaume, Ludovic ULiege et al

in Applied Energy (2018), 212

This paper focuses on a charge-sensitive model to characterize the off-design performance of low-capacity organic Rankine cycle (ORC) power systems. The goal is to develop a reliable steady-state model ... [more ▼]

This paper focuses on a charge-sensitive model to characterize the off-design performance of low-capacity organic Rankine cycle (ORC) power systems. The goal is to develop a reliable steady-state model that only uses the system boundary conditions (i.e. the supply heat source/heat sink conditions, the mechanical components rotational speeds, the ambient temperature and the total charge of working fluid) in order to predict the ORC performance. To this end, sub-models are developed to simulate each component and they are assembled to model the entire closed-loop system. A dedicated solver architecture is proposed to ensure high-robustness for charge-sensitive simulations. This work emphasizes the complexity of the heat exchangers modelling. It demonstrates how state-of-the-art correlations may be used to identify the convective heat transfer coefficients and how the modelling of the charge helps to assess their reliability. In order to compute the fluid density in two-phase conditions, five different void fraction models are investigated. A 2 kWe unit is used as case study and the charge-sensitive ORC model is validated by comparison to experimental measurements. Using this ORC model, the mean percent errors related to the thermal power predictions in the heat exchangers are lower than 2%. Regarding the mechanical powers in the pump/expander and the net thermal efficiency of the system, these errors are lower than 11.5% and 11.6%, respectively. [less ▲]

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See detailCo-Produced Legitimacies: Parliamentary Technology Assessment and Nuclear Waste Management in France
Parotte, Céline ULiege; Delvenne, Pierre ULiege

in Science and Public Policy (2018)

In this article we question the roles and engagement of the French Parliamentary office of Technology Assessment (PTA) in governing Nuclear Waste Management (NWM) over an extended timeframe (1990-2017 ... [more ▼]

In this article we question the roles and engagement of the French Parliamentary office of Technology Assessment (PTA) in governing Nuclear Waste Management (NWM) over an extended timeframe (1990-2017). We argue that the trajectories of the PTA and the NWM program are so intertwined that we gain analytical purchase from understanding them together. Our empirical analysis looks at three episodes of co-production of technological and political practices: (1) the PTA as an independent assessor (1990); (2) the PTA as a regular follower (1996-2005); (3) the PTA as a whistle-blower (2007-2017). We find that maintaining or redrawing boundaries between science and policy have increasingly been necessary but difficult in the course of the PTA’s mainstreaming into the policy-making landscape and the nuclear establishment. We conclude by examining the implications for PTAs of a possible shift from concerns about democratizing expertise to politicizing knowledge for policy. [less ▲]

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See detailKapitza stabilization of a repulsive Bose-Einstein condensate in an oscillating optical lattice
Martin, John ULiege; Georgeot, Bertrand; Guéry-Odelin, David et al

in Physical Review A (2018), 97

We show that the Kapitza stabilization can occur in the context of nonlinear quantum fields. Through this phenomenon, an amplitude-modulated lattice can stabilize a Bose–Einstein condensate with repulsive ... [more ▼]

We show that the Kapitza stabilization can occur in the context of nonlinear quantum fields. Through this phenomenon, an amplitude-modulated lattice can stabilize a Bose–Einstein condensate with repulsive interactions and prevent the spreading for long times. We present a classical and quantum analysis in the framework of Gross-Pitaevskii equation, specifying the parameter region where stabilization occurs. Effects of nonlinearity lead to a significant increase of the stability domain compared with the classical case. Our proposal can be experimentally implemented with current cold atom settings. [less ▲]

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See detailThe effects of early age thermal conditioning and vinegar supplementation of drinking water on physiological responses of female and male broiler chickens reared under summer Mediterranean temperatures
Berrama, Zahra; Temim, Soraya; Djellout, Baya et al

in International Journal of Biometeorology (2018)

The effects of early age thermal conditioning (ETC), vinegar supplementation (VS) of drinking water, broilers’ gender, and their interactions on respiratory rate, body temperature, and blood parameters ... [more ▼]

The effects of early age thermal conditioning (ETC), vinegar supplementation (VS) of drinking water, broilers’ gender, and their interactions on respiratory rate, body temperature, and blood parameters (biochemical, hematological, and thyroid hormones) of broiler chickens reared under high ambient temperatures were determined. A total of 1100 1-day-old chicks were divided into four treatments: the “control” which were non-conditioned and non-supplemented; “heat-conditioned” which were exposed to 38 ± 1 °C for 24 h at 5 days of age; “vinegar supplemented” which were given drinking water supplemented with 0.2% of commercial vinegar from 28 to 49 days of age; and “combined” which were both heat conditioned and vinegar supplemented. All groups were exposed to the natural fluctuations of summer ambient temperature (average diurnal ambient temperature of about 30 ± 1 °C and average relative humidity of 58 ± 5%). ETC and broiler gender did not affect the respiratory rate or body temperature of chronic heat-exposed chickens. VS changed the body temperature across time (d35, d42, d49) (linear and quadratic effects, P < 0.05) without changing respiratory rate. Heat-conditioned chickens exhibited lower levels of glycemia (P < 0.0001) and higher hematocrit and red blood cell counts (P < 0.05). Furthermore, the greatest effects of VS, alone or associated with ETC, were the lowering of cholesterol and triglyceride blood concentrations. A significant (P < 0.05) effect of ETC, gender, and ETC×gender on T3:T4 ratio was observed. Finally, some beneficial physiological responses induced by ETC and VS, separately or in association, on chronically heat-stressed chickens were observed. However, the expected cumulative positive responses when the two treatments were combined were not evident. [less ▲]

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See detailGround-based FTIR retrievals of SF6 on Reunion Island
Zhou, M.; Langerock, B.; Vigouroux, C. et al

in Atmospheric Measurement Techniques (2018), 11

SF6 total columns were successfully retrieved from FTIR (Fourier transform infrared) measurements (Saint Denis and Maïdo) on Reunion Island (21º S, 55º E) between 2004 and 2016 using the SFIT4 algorithm ... [more ▼]

SF6 total columns were successfully retrieved from FTIR (Fourier transform infrared) measurements (Saint Denis and Maïdo) on Reunion Island (21º S, 55º E) between 2004 and 2016 using the SFIT4 algorithm: the retrieval strategy and the error budget were presented. The FTIR SF6 retrieval has independent information in only one individual layer, covering the whole of the troposphere and the lower stratosphere. The trend in SF6 was analysed based on the FTIR-retrieved dry-air column-averaged mole fractions (XSF6 ) on Reunion Island, the in situ measurements at America Samoa (SMO) and the collocated satellite measurements (Michelson Interferometer for Passive Atmospheric Sounding, MIPAS, and Atmospheric Chemistry Experiment Fourier Transform Spectrometer, ACE-FTS) in the southern tropics. The SF6 annual growth rate from FTIR retrievals is 0.265±0.013 pptv year-1 for 2004–2016, which is slightly weaker than that from the SMO in situ measurements (0.285±0.002 pptv year-1) for the same time period. The SF6 trend in the troposphere from MIPAS and ACE-FTS observations is also close to the ones from the FTIR retrievals and the SMO in situ measurements. [less ▲]

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See detailIsotopic ratios in outbursting comet C/2015 ER61
Yang, Bin; Hutsemekers, Damien ULiege; Shinnaka, Yoshiharu et al

in Astronomy and Astrophysics (2018), 609

Isotopic ratios in comets are critical to understanding the origin of cometary material and the physical and chemical conditions in the early solar nebula. Comet C/2015 ER61 (PANSTARRS) underwent an ... [more ▼]

Isotopic ratios in comets are critical to understanding the origin of cometary material and the physical and chemical conditions in the early solar nebula. Comet C/2015 ER61 (PANSTARRS) underwent an outburst with a total brightness increase of 2 magnitudes on the night of 2017 April 4. The sharp increase in brightness offered a rare opportunity to measure the isotopic ratios of the light elements in the coma of this comet. We obtained two high-resolution spectra of C/2015 ER61 with UVES/VLT on the nights of 2017 April 13 and 17. At the time of our observations, the comet was fading gradually following the outburst. We measured the nitrogen and carbon isotopic ratios from the CN violet (0, 0) band and found that [SUP]12[/SUP]C/[SUP]13[/SUP]C = 100 ± 15, [SUP]14[/SUP]N/[SUP]15[/SUP]N = 130 ± 15. In addition, we determined the [SUP]14[/SUP]N/[SUP]15[/SUP]N ratio from four pairs of NH[SUB]2[/SUB] isotopolog lines and measured [SUP]14[/SUP]N/[SUP]15[/SUP]N = 140 ± 28. The measured isotopic ratios of C/2015 ER61 do not deviate significantly from those of other comets. [less ▲]

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See detail"Gamification" d'activités d'entrainement - Retour d'expérience dans un cours de chimie générale
le Maire, Nathalie ULiege; Fauconnier, Marie-Laure ULiege; Colaux, Catherine ULiege et al

in L'Actualité chimique (2018), 426

Depuis plusieurs années, l’enseignement supérieur est partie prenante du questionnement sur la pertinence pédagogique du jeu numérique mais se heurte au temps, à la complexité et au coût de développement ... [more ▼]

Depuis plusieurs années, l’enseignement supérieur est partie prenante du questionnement sur la pertinence pédagogique du jeu numérique mais se heurte au temps, à la complexité et au coût de développement qu’entraine la création d’environnements narratifs, immersifs et de simulation. Une proposition alternative aux « serious games » immersifs, appelée « gamification » [1], consiste à appliquer des éléments et mécanismes du jeu à des situations et des contextes non ludiques en vue de générer chez l’étudiant-joueur différents bénéfices attribués à la pédagogie ludique [2]. L’application d’éléments dits de « gamification » à des activités d’entrainement permet notamment de concevoir des mini-jeux [3] centrés sur un concept à maitriser. C’est précisément ce à quoi 223 étudiants bioingénieurs de première année de l’Université de Liège ont pris part en participant à « World of Chemistry » dans le cadre de leur cours de chimie générale. [less ▲]

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See detailMarcel Schmitz: tape planner
Dejasse, Erwin ULiege

in Epidemiology and Psychiatric Sciences (2018), 27(1), 22-23

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See detailDesigning an air-to-air heat exchanger dedicated to single room ventilation with heat recovery
Gendebien, Samuel ULiege; Martens, Jonathan; Prieels, Luc et al

in Building Simulation: An International Journal (2018), 11(1), 103-113

The present paper focuses on the development steps of heat exchangers dedicated to single room ventilation unit with heat recovery (SRVHR) by proposing a numerical approach. A methodology is suggested in ... [more ▼]

The present paper focuses on the development steps of heat exchangers dedicated to single room ventilation unit with heat recovery (SRVHR) by proposing a numerical approach. A methodology is suggested in order to determine the best trade-off between hydraulic and thermal performance given a specific geometry. The methodology consists in a mapping of the coefficient of performance (COP) of the unit. The latter is defined as the ratio between recovered heat and the fan energy use, given a specific indoor/outdoor temperature difference. However, the energy performance should not be the only criterion to be taken into account in the frame of the design steps of a heat recovery exchanger: technical, economic and acoustic aspects should also be considered. This numerical methodology is illustrated by means of a real example of a newly developed heat exchanger dedicated to a SRVHR. The optimization is first performed while using a semi-empirical model (based on the use of correlations and on a spatial division of the studied heat exchanger). The semi-empirical model allows for the creation of a COP map in order to identify the most effective geometry parameters for the heat exchanger. The decision concerning the final geometry is made accounting for the so-called technical, economic and acoustic considerations. A discussion on some parameters needed for the COP establishment is also proposed. [less ▲]

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See detailBelgian consensus statement on the diagnosis and management of patients with atypical hemolytic uremic syndrome.
Claes, Kathleen J.; Massart, Annick; COLLARD, Laure ULiege et al

in Acta Clinica Belgica (2018), 73(1), 80-89

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See detailComparison of chlordecone and NDL-PCB decontamination dynamics in growing male kids after cessation of oral exposure: Is there a potential to decrease the body levels of these pollutants by dietary supplementation of activated carbon or paraffin oil?
Lastel, Marie-Laure; Fournier, Agnès; Jurjanz, Stefan et al

in Chemosphere (2018), 193

Sixteen weaned male Alpine kids (Capra hircus) were subjected to a 21-day oral daily exposure of 0.05 mg kg 1 BW. d 1 of chlordecone (CLD) and 0.30 mg kg 1 BW. d 1 of each non-dioxin-like polychlorinated ... [more ▼]

Sixteen weaned male Alpine kids (Capra hircus) were subjected to a 21-day oral daily exposure of 0.05 mg kg 1 BW. d 1 of chlordecone (CLD) and 0.30 mg kg 1 BW. d 1 of each non-dioxin-like polychlorinated biphenyls (NDL-PCBs, congeners 28, 52, 101, 138, 153 and 180). Four kids, identified as the CONTA group, were slaughtered at the end of the exposure, while the remaining animals (n ¼ 12) were fed with specific diets for an additional 21-day decontamination period before slaughtering. Kids from the DECONTA (n ¼ 4) group were fed a control diet, while those from the AC10% and PO8% group received pellets supplemented with 10% activated carbon (AC) and 8% paraffin oil (PO), respectively. CLD and NDL-PCB levels in blood, liver, peri-renal fat and muscles from different groups were analysed to compare the decontamination dynamics of the pollutants and to determine the efficiency of AC and PO to decrease the body levels of pollutants. After the decontamination period, the CLD levels considerably decreased (more than 60%) in blood, liver, muscles and fat. Concerning NDL-PCBs, the decontamination process was much lower. Overall, CLD appeared to be less retained in kids’ organism compared with NDL-PCBs, and the decontamination dynamics of these pollutants appeared to be different because of their specific physicochemical properties and lipophilicity. Furthermore, the dietary supplementation with AC or PO did not significantly affect the decontamination dynamics. [less ▲]

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See detailWat zijn de risico’s van vroege sportspecialisatie op de gezondheid van kinderen?
Jidovtseff, Boris ULiege

in JGZ : Tijdschrift voor Jeugdgezondheidszorg (2018), 50(1), 2-6

Enkele wetenschappelijke studies uit de jaren 90 toonden aan dat wie in bepaalde domeinen zoals sport een zeer hoog niveau wil bereiken, al heel vroeg en intens moet beginnen te trainen. Wie te lang wacht ... [more ▼]

Enkele wetenschappelijke studies uit de jaren 90 toonden aan dat wie in bepaalde domeinen zoals sport een zeer hoog niveau wil bereiken, al heel vroeg en intens moet beginnen te trainen. Wie te lang wacht, maakt maar weinig kans om ooit de top te bereiken. De media-aandacht voor jonge sporters, de organisatie van belangrijke jeugdcompetities en de prestatiedrang op erg jonge leeftijd, hebben bijgedragen tot vroege specialisaties. Echter toonden de onderzoekers aan dat die aanpak niet bijzonder efficiënt is en bovendien de ontwikkeling en de gezondheid van het kind in het gedrang kan brengen. De laatste jaren worden alternatieve en kindgerichte oplossingen voorgesteld als ontwikkelingsmodellen op lange termijn. [less ▲]

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See detailSpurious intraoperative PTH results observed with 2(nd), but not with 3(rd) generation PTH assays.
Cavalier, Etienne ULiege; SCHLECK, Marie-Louise ULiege; Souberbielle, Jean-Claude

in Clinica Chimica Acta (2018), 477

We report here an interference that has been observed with 2(nd) generation PTH assays (PTH2), but not with 3(rd) generation PTH ones (PTH3), during PTH monitoring occurring in a surgical intervention for ... [more ▼]

We report here an interference that has been observed with 2(nd) generation PTH assays (PTH2), but not with 3(rd) generation PTH ones (PTH3), during PTH monitoring occurring in a surgical intervention for the resection of a parathyroid adenoma. The patient was cured and calcium levels returned to normal the next day, but PTH did not decrease with PTH2 whereas it decreased by 50% with PTH3 assays during the intervention. The reason is probably a PTH fragment released by the parathyroid gland during surgery. This fragment possesses the C-terminal part of the peptide but lacks the first amino-acids and may thus be considered as a member of the non-(1-84) PTH fragments family. It has also a longer half-life than 1-84 PTH. To avoid reporting spurious results to the surgeons, we thus recommend using PTH3 assays for monitoring of intra-operative PTH. [less ▲]

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See detailDroit pénal et numérique : vers un nouveau paradigme ?
Franssen, Vanessa ULiege

in Revue de la Faculté de Droit de l'Université de Liège (2018)

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See detailIndividual movements, home ranges and habitat use by native rheophilic cyprinids and non-native catfish in a large regulated river
Capra, Hervé; Pella, Hervé; Ovidio, Michaël ULiege

in Fisheries Management & Ecology (2018)

The mobility patterns of two native species, barbel, Barbus barbus (L.) and chub, Squalius cephalus (L.), and of one non-native fish species, the catfish Silurus glanis (L.), were assessed on a 35.5-km ... [more ▼]

The mobility patterns of two native species, barbel, Barbus barbus (L.) and chub, Squalius cephalus (L.), and of one non-native fish species, the catfish Silurus glanis (L.), were assessed on a 35.5-km reach of the Upper Rhône River, a strong flowing river with notable thermal regime alterations. An active acoustic tracking technique adapted to large rivers allowed (1) the identification of longitudinal home ranges, movements and preferred habitat at large scale, and (2) the analysis of the influence of discharge and water temperature on the movement patterns of the fish. The active fish-tracking system recorded 1,572 fish localisations over 7 months on a weekly basis for 80% of the tagged fish (37 barbel, 23 chub and 13 catfish). Compared with the catfish, barbel and chub showed wider longitudinal home ranges, more movements >1 km and higher interindividual variability. The catfish preferred artificially heated habitats with less morphological diversity. The three species were more often localised in river sections with high density of woody debris. The results suggest that habitat degradation is more damaging for cyprinids in large modified rivers, while the catfish seemed less, impacted. [less ▲]

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See detailBiocontrol of invasive carp : risks abound
Marshall, J; Davison, A. J.; Kopf, R. K. et al

in Science (2018)

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See detailRhétoriques de Merleau-Ponty
Franck, Thomas ULiege

in Rhetor. Journal of the Canadian Society for the Study of Rhetoric (2018), 7

The perspective here is voluntarily ambivalent. On the one hand, the article pays attention to the the theoretical and methodological contribution Merleau-Ponty’s phenomenology made to discourse analysis ... [more ▼]

The perspective here is voluntarily ambivalent. On the one hand, the article pays attention to the the theoretical and methodological contribution Merleau-Ponty’s phenomenology made to discourse analysis; on the other hand, it traces the rhetorical fecundity of the philosopher’s discourse that actualizes and materializes in its very form its own philosophical conceptions. Three rhetoric-conceptual elements are discussed, through an analysis of “Le language indirect et les voix du silence” [Indirect Language and the Voices of Silence], a text from Signs [Signs] which has to be contextualized within the phenomenologist’s whole work: i. the metaphor of the fabric as an expression of the interrelationship between a discourse and its external determinations; ii. the distinction between parole parlée and parole parlante, which can be conceived of in connection with the distinction in discourse analysis between interdiscourse and deviation as its deterritorialization; iii. the importance of taking into account emotions as an integral part of any discourse that goes beyond the rational institution between fiction and verisdiction. [less ▲]

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See detailA large oxygen-dominated core from the seismic cartography of a pulsating white dwarf
Giammichele, Noemi; Charpinet, Stéphane; Fontaine, Gilles et al

in Nature (2018), 554

White-dwarf stars are the end product of stellar evolution for most stars in the Universe1. Their interiors bear the imprint of fundamental mechanisms that occur during stellar evolution2,3. Moreover ... [more ▼]

White-dwarf stars are the end product of stellar evolution for most stars in the Universe1. Their interiors bear the imprint of fundamental mechanisms that occur during stellar evolution2,3. Moreover, they are important chronometers for dating galactic stellar populations, and their mergers with other white dwarfs now appear to be responsible for producing the type Ia supernovae that are used as standard cosmological candles4. However, the internal structure of white-dwarf stars—in particular their oxygen content and the stratification of their cores—is still poorly known, because of remaining uncertainties in the physics involved in stellar modelling codes5,6. Here we report a measurement of the radial chemical stratification (of oxygen, carbon and helium) in the hydrogen- deficient white-dwarf star KIC08626021 (J192904.6+444708), independently of stellar-evolution calculations. We use archival data7,8 coupled with asteroseismic sounding techniques9,10 to determine the internal constitution of this star. We find that the oxygen content and extent of its core exceed the predictions of existing models of stellar evolution. The central homogeneous core has a mass of 0.45 solar masses, and is composed of about 86 per cent oxygen by mass. These values are respectively 40 per cent and 15 per cent greater than those expected from typical white-dwarf models. These findings challenge present theories of stellar evolution and their constitutive physics, and open up an avenue for calibrating white-dwarf cosmochronology11. [less ▲]

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See detailTwo-dimensional dynamics of elasto-inertial turbulence and its role in polymer drag reduction
Sid, Samir ULiege; Dubief, Yves; Terrapon, Vincent ULiege

in Physical Review Fluids (2018), 3(1),

Direct numerical simulations of a FENE-P fluid in both two- and three-dimensional straight periodic channels find that elasto-inertial turbulence is fundementally two-dimensional. The spurious effect of ... [more ▼]

Direct numerical simulations of a FENE-P fluid in both two- and three-dimensional straight periodic channels find that elasto-inertial turbulence is fundementally two-dimensional. The spurious effect of artificial diffusion of the polymer is demonstrated. [less ▲]

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See detailHeterogeneity of estrogen receptor alpha and progesterone receptor distribution in lesions of deep infiltrating endometriosis of untreated women or during exposure to various hormonal treatments.
BRICHANT, Géraldine ULiege; NERVO, Patricia ULiege; Albert, Adelin ULiege et al

in Gynecological Endocrinology : The Official Journal of the International Society of Gynecological Endocrinology (2018)

Deep infiltrating endometriosis (DIE) responds variably to hormonal therapy. Mutations in cancer driver genes have been identified in a fraction of the ectopic endometrial epithelial cells, suggesting a ... [more ▼]

Deep infiltrating endometriosis (DIE) responds variably to hormonal therapy. Mutations in cancer driver genes have been identified in a fraction of the ectopic endometrial epithelial cells, suggesting a functional heterogeneity of these lesions. To evaluate the phenotype heterogeneity of cells in DIE, we measured the expression of estrogen receptor alpha (ERalpha) and of progesterone receptor (PR) in DIE of untreated women or under various treatments. We analyzed the luminal epithelial height (LEH), immunoreactive epithelial staining (IRS) and stromal staining intensity (SSI) of ERalpha and PR. We observed a high variability in the same gland, among distinct glands in the same sample and among distinct patients receiving the same treatment. LEH variability was primarily due to epithelial cells heterogeneity in a gland, secondarily to the glands randomly evaluated on the same section, and tertiary to the patient category. Variability in IRS and SSI scores was primarily the consequence of their heterogeneity in the same woman and to a lesser extent to variability among patients. LEH and SSI were not modified according to treatment. IRS for PR was lower in treated patients. This heterogeneity of ERalpha and PR distribution could explain why endocrine treatments are unable to cure this condition. [less ▲]

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See detailLa supervision financière au sein de l’Union européenne et de la zone euro après la crise : un cadre juridique toujours en pleine évolution
Van Cleynenbreugel, Pieter ULiege

in Observateur de Bruxelles (2018)

Cet article offre un panorama des initiatives prises par les institutions de l'Union européenne mettant sur pied un cadre de supervision financière harmonisée au sein du marché intérieur.

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See detailMacroporous poly(ionic liquid)/ionic liquid gels via CO2-based emulsion-templating polymerization
Mathieu, Kevin ULiege; Jérôme, Christine ULiege; Debuigne, Antoine ULiege

in Polymer Chemistry (2018), 9(4), 428-437

Structuring poly(ionic liquid)s (PILs) into porous materials or swelling PILs with free ionic liquids (ILs) has received specific attention recently and contributed to improve the performances of these ... [more ▼]

Structuring poly(ionic liquid)s (PILs) into porous materials or swelling PILs with free ionic liquids (ILs) has received specific attention recently and contributed to improve the performances of these materials used in a wide range of applications. The present work aims to take benefit of both approaches and produce macroporous PIL/IL gels in a single step through an innovative emulsion-templated polymerization method based on supercritical carbon dioxide (scCO2). More precisely, ILs vinyl monomers and crosslinkers were polymerized in the presence of non polymerizable ILs within the outer phase of a CO2-in-ILs high internal phase emulsion (HIPE). Specific macromolecular surfactants were synthesized by controlled radical polymerization techniques and tested for the stabilization of the CO2-in-ILs emulsions. While optimizing the polymerization conditions, we found that adding a limited amount of water in the medium was beneficial for the emulsion stability. Overall, this straightforward process gave access to macroporous polyHIPEs composed of poly(vinyl imidazolium) networks swollen by ‘free’ vinyl imidazolium-based ILs having interesting properties such as switchable polarity upon simple anion exchange reaction. [less ▲]

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See detailAnti-biofouling and antibacterial surfaces via a multicomponent coating deposited from an up-scalable atmospheric-pressure plasma-assisted CVD process
Moreno-Couranjou, Maryline; Mauchauffé, Rodolphe; Bonot, Sébastienv et al

in Journal of Materials Chemistry B (2018), 6(4), 614-623

Prevention of bacterial adhesion and biofilm formation on the surfaces of materials is a topic of major medical and societal importance. In this study, an up-scalable atmospheric-pressure plasma assisted ... [more ▼]

Prevention of bacterial adhesion and biofilm formation on the surfaces of materials is a topic of major medical and societal importance. In this study, an up-scalable atmospheric-pressure plasma assisted deposition method is introduced to produce a multicomponent coating towards the elaboration of antibacterial and anti-biofilm surfaces. Interestingly, from a single catechol-based monomer, high deposition rates of highly chemically reactive functional thin films bearing catechol as well as quinone groups are achieved. The catechol-bearing thin film allows the in situ silver nanoparticle formation, assessed by scanning electron microscopy and EDX, whilst the enriched-quinone thin film is exploited for immobilizing dispersine B, an enzyme. In vitro functional assays demonstrated the dual antibacterial and anti-biofouling resistance properties of the coatings due to the antibacterial effect of silver and the fouling resistance of grafted dispersine B, respectively. Surfaces coated only with silver provide an antibacterial effect but fail to inhibit bacterial attachment, highlighting the usefulness of such dual-action surfaces. The approach presented here provides a simple and effective chemical pathway to construct powerful antibacterial surfaces for various industrial applications. [less ▲]

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