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See detailEffect of extraction pH on techno-functional properties of crude extracts from wild cardoon (Cynara cardunculus L.) flowers
Ben Amira, Amal ULg; Makhlouf, Ines; Petrut, Raul Flaviu et al

in Food Chemistry (2017), 225

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See detailLa grande dépression (1929-1935)
Geerkens, Eric ULg

Conference given outside the academic context (2017)

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See detailApprentissage d'auto-hypnose/self-care en oncologie. Pour qui? Comment? Pour quel intérêt?
Charland-Verville, Vanessa ULg; FAYMONVILLE, Marie-Elisabeth ULg; VANHAUDENHUYSE, Audrey ULg et al

in Psycho-Oncologie (2017), 11

Les symptômes physiques les plus fréquemment liés au cancer et à ses traitements sont la douleur, les nausées et la fatigue. Ils peuvent influencer négativement la qualité de vie. Les interventions de ... [more ▼]

Les symptômes physiques les plus fréquemment liés au cancer et à ses traitements sont la douleur, les nausées et la fatigue. Ils peuvent influencer négativement la qualité de vie. Les interventions de groupe visant l’apprentissage de l’autohypnose, associé ou non à l’autobienveillance, ont démontré l’amélioration de l’adaptation des patients oncologiques. Le but de cette revue est de relever l’efficacité de l’hypnose dans la gestion des symptômes liés à la maladie et de mieux comprendre les mécanismes de la technique. [less ▲]

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See detailRe-emergence of the Schmallenberg virus associated triad hydranencephaly-micromyelia-arthrogryposis in a newborn calf in Belgium, 2016
Bayrou, Calixte ULg; Garigliany, Mutien-Marie ULg; Cassart, Dominique ULg et al

in Veterinary Record Case Reports (2017), 4(1), 000342

Schmallenberg virus (SBV) emerged in Germany in 2011, then spread rapidly across Europe, causing an epizootic outbreak of abortion, stillbirth and birth at term of lambs, kids and calves with neurological ... [more ▼]

Schmallenberg virus (SBV) emerged in Germany in 2011, then spread rapidly across Europe, causing an epizootic outbreak of abortion, stillbirth and birth at term of lambs, kids and calves with neurological signs and/or musculo-skeletal malformations. SBV-associated disease in newborns disappeared in Belgium in 2013. Here, we describe a SBV genomic RNA-positive malformed calf born in May 2016. It reveals the return of SBV circulation during the fall 2015 in the said area. [less ▲]

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See detailFirst scattered-light images of the gas-rich debris disk around 49 Ceti
Choquet, É.; Milli, J.; Wahhaj, Z. et al

in Astrophysical Journal Letters (2017), 834(2), 12

We present the first scattered-light images of the debris disk around 49 ceti, a ~40 Myr A1 main sequence star at 59 pc, famous for hosting two massive dust belts as well as large quantities of atomic and ... [more ▼]

We present the first scattered-light images of the debris disk around 49 ceti, a ~40 Myr A1 main sequence star at 59 pc, famous for hosting two massive dust belts as well as large quantities of atomic and molecular gas. The outer disk is revealed in reprocessed archival Hubble Space Telescope NICMOS F110W images, as well as new coronagraphic H band images from the Very Large Telescope SPHERE instrument. The disk extends from 1.1" (65 AU) to 4.6" (250 AU), and is seen at an inclination of 73degr, which refines previous measurements at lower angular resolution. We also report no companion detection larger than 3 M_Jup at projected separations beyond 20 AU from the star (0.34"). Comparison between the F110W and H-band images is consistent with a grey color of 49 ceti's dust, indicating grains larger than >2microns. Our photometric measurements indicate a scattering efficiency / infrared excess ratio of 0.2-0.4, relatively low compared to other characterized debris disks. We find that 49 ceti presents morphological and scattering properties very similar to the gas-rich HD 131835 system. From our constraint on the disk inclination we find that the atomic gas previously detected in absorption must extend to the inner disk, and that the latter must be depleted of CO gas. Building on previous studies, we propose a schematic view of the system describing the dust and gas structure around 49 ceti and hypothetic scenarios for the gas nature and origin. [less ▲]

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See detailBiocompatibility of polymer-infiltrated-ceramicnetwork (PICN) materials with Human Gingival Keratinocytes (HGKs)
GRENADE, Charlotte ULg; Gillet, Marie-Claire ULg; PIRARD, Catherine ULg et al

in Dental Materials (2017), 33

Objective. Biocompatibility of polymer-infiltrated-ceramic-network (PICN) materials, a new class of CAD–CAM composites, is poorly explored in the literature, in particular, no data are available regarding ... [more ▼]

Objective. Biocompatibility of polymer-infiltrated-ceramic-network (PICN) materials, a new class of CAD–CAM composites, is poorly explored in the literature, in particular, no data are available regarding Human Gingival Keratinocytes (HGK). The first objective of this study was to evaluate the in vitro biocompatibility of PICNs with HGKs in comparison with other materials typically used for implant prostheses. The second objective was to correlate results with PICN monomer release and indirect cytotoxicity. Methods. HGK attachment, proliferation and spreading on PICN, grade V titanium (Ti), yttrium zirconia (Zi), lithium disilicate glass-ceramic (eM) and polytetrafluoroethylene (negative control) discs were evaluated using a specific insert-based culture system. For PICN and eM samples, monomer release in the culture medium was quantified by high performance liquid chromatography and indirect cytotoxicity tests were performed. Results. Ti and Zi exhibited the best results regarding HGK viability, number and coverage. eM showed inferior results while PICN showed statistically similar results to eM but also to Ti regarding cell number and to Ti and Zi regarding cell viability. No monomer release from PICN discs was found, nor indirect cytotoxicity, as for eM. Significance. The results confirmed the excellent behavior of Ti and Zi with gingival cells. Even if polymer based, PICN materials exhibited intermediate results between Ti–Zi and eM. These promising results could notably be explained by PICN high temperature–high pressure (HT–HP) innovative polymerization mode, as confirmed by the absence of monomer release and indirect cytotoxicity [less ▲]

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See detailGeneralized Pascal triangles for binomial coefficients of words: a short introduction
Stipulanti, Manon ULg

Conference (2017, January 09)

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word ... [more ▼]

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word. Similarly to the Sierpiński gasket that can be built as the limit set, for the Hausdorff distance, of a convergent sequence of normalized compact blocks extracted from Pascal triangle modulo 2, we describe and study the first properties of the subset of [0, 1] × [0, 1] associated with this extended Pascal triangle modulo a prime p. [less ▲]

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See detailGeophysical characterization and monitoring of a municipal solid waste landfill
Dumont, Gaël ULg

Doctoral thesis (2017)

During this thesis, we aimed at demonstrating the value of geophysical methods for a waste deposit characterization in the context of landfill mining, both for energy and raw materials valorization. Our ... [more ▼]

During this thesis, we aimed at demonstrating the value of geophysical methods for a waste deposit characterization in the context of landfill mining, both for energy and raw materials valorization. Our preliminary analysis of the literature revealed that a multi-scale and multi-method investigation strategy was required. We also noticed an increasing interest in geoelectrical methods for the waste water content estimation, and for the monitoring of water content changes due to infiltration through the cover layer and water recirculation operation in bioreactor landfills. Firstly, we used the electromagnetic (EM) and magnetic mapping methods, quick and cost effective, to determine the site horizontal boundaries of our test-landfill. We combined the Horizontal to Vertical Noise Spectral Ratio (HVNSR) and the Multichannel Analysis of Surface Waves (MASW) seismic methods to estimate the thickness of this particularly deep deposit site. We also used the electrical resistivity tomography (ERT) to estimate the depth to water table and characterize the humidity of the unsaturated zone. Secondly, we investigated the suitability of geoelectrical methods (ERT, and borehole EM) to obtain spatially distributed information over the waste water content. For this purpose, petrophysical laws (established with laboratory experiments on waste samples) controlling the effects of water content, density and temperature on the bulk electrical resistivity of humid waste were established. Thirdly, we used numerical simulations to highlight several pitfalls occurring during the ERT monitoring of fresh water infiltration through a landfill cover layer. The effects on the interpretation of electrical resistivity changes of the ERT resolution, the background condition heterogeneity, the uncertainty on water content computation, and the often neglected dilution, were considered to extract the maximum information from the data and avoid over-interpretation. Lastly, we combined the ERT and the distributed temperature monitoring methods to evaluate the efficiency of horizontal drains, which are commonly used to regulate water content in a bioreactor. This tools provided us with valuable insight on the drain design suitability (diameter, depth, length, injected volume, etc.), the injected water flow behavior (waste anisotropy, heterogeneity, and the effect of vertical gas wells), and the humidification of the dry waste material efficiency. Taken together, our results have shown that geophysics represents a valuable approach for landfill investigation, provided that a special care is given to the data analysis. We thus finally discussed several interpretations limitation and proposed some insights to overcome them. [less ▲]

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See detailThe soundscape of Arctic Charr spawning grounds in lotic and lentic environments: can passive acoustic monitoring be used to detect spawning activities?
Bolgan, Marta ULg; O'Brien, Joanne; Chorazyczewska, Emilia et al

in Bioacoustics (2017)

The aims of this study were to (i) assess the efficacy of passive acoustic monitoring (PAM) for detecting Arctic Charr at their spawning grounds and (ii) characterize the overall acoustic soundscape of ... [more ▼]

The aims of this study were to (i) assess the efficacy of passive acoustic monitoring (PAM) for detecting Arctic Charr at their spawning grounds and (ii) characterize the overall acoustic soundscape of these sites. PAM was carried out over three Arctic Charr spawning grounds in the UK, one lotic and two lentic. 24-h cycles of recordings were collected prior to and during the Arctic Charr spawning season, which was determined from data returns by simultaneous net monitoring. Acoustic analysis consisted of manual quantification of sound sources, Acoustic Complexity Index (ACI) calculation and spectral analysis in 1/3 octave band (SPL; dB re 1 μPa). In the lotic spawning ground, prior to the beginning of Arctic Charr spawning, SPL and ACI showed a restricted range of variation throughout the 24-h, while during spawning the night values of SPL and ACI were found to significantly increase, concurrently with the rate of gravel noise induced by fish spawning activities and fish air passage sounds. Both prior to and during the Arctic Charr run, the lentic soundscape was characterized by diel variation due to the daytime presence of anthropogenic noise and the night-time presence of insect calls, while only a few occurrences of fish air passage sounds and gravel noise were recorded. These findings suggest that PAM over Arctic Charr spawning grounds could provide meaningful information to be used in developing management plans for this threatened species, such as determining the location and time of arrival, diel pattern and length of spawning activities. [less ▲]

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See detailModel-Based Optimization of the Medium Refreshment Regime During Neotissue Growth in a Perfusion Bioreactor
Mehrian, Mohammad ULg; guyot, Yann; Papantoniou, Ioannis et al

Scientific conference (2017, January 08)

Computational models are interesting tools to facilitate the translation from the laboratory to the patient. In regenerative medicine, computer models describing bioprocesses taking place in bioreactor ... [more ▼]

Computational models are interesting tools to facilitate the translation from the laboratory to the patient. In regenerative medicine, computer models describing bioprocesses taking place in bioreactor environment can assist in designing process conditions leading to robust and economically viable products. In this study we present a low-cost computational model describing the neotissue (cells + extracellular matrix) growth in a perfusion bioreactor set-up. The neotissue growth is influenced by the geometry of the scaffold, the flow-induced shear stress and a number of metabolic factors. After initial model validation, a Genetic Algorithm optimization technique is used to find the best medium refreshment regime (frequency and percentage of medium replaced) resulting in a maximal amount of neotissue being produced in the scaffold in a 28 days of culture period. [less ▲]

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See detailFlow boiling heat transfer and pressure drop characteristics of R134a, R1234yf and R1234ze in a plate heat exchanger for organic Rankine cycle units
Zhang, Ji; Desideri, Adriano ULg; Ryhl Kaern, Martin et al

in International Journal of Heat & Mass Transfer (2017), 108

The optimal design of the evaporator is one of the key issues to improve the efficiency and economics of organic Rankine cycle units. The first step in studying the evaporator design is to understand the ... [more ▼]

The optimal design of the evaporator is one of the key issues to improve the efficiency and economics of organic Rankine cycle units. The first step in studying the evaporator design is to understand the thermal- hydraulic performance of the working fluid in the evaporator of organic Rankine cycles. This paper is aimed at obtaining flow boiling heat transfer and pressure drop characteristics in a plate heat exchanger under the working conditions prevailing in the evaporator of organic Rankine cycle units. Two hydroflu- oroolefins R1234yf and R1234ze, and one hydrofluorocarbon R134a, were selected as the working fluids. The heat transfer coefficients and pressure drops of the three working fluids were measured with varying saturation temperatures, mass fluxes, heat fluxes and outlet vapour qualities, which range from 60 C to 80 C, 86 kg/m2 s to 137 kg/m2 s, 9.8 kW/m2 to 36.8 kW/m2 and 0.5 to 1, respectively. The working con- ditions covered relatively high saturation temperatures (corresponding reduced pressures of 0.35–0.74), which are prevailing in organic Rankine cycles yet absent in the open literature. The experimental data were compared with existing correlations, and new correlations were developed that are more suitable for evaporation in organic Rankine cycles. The experimental results indicate that heat transfer coefficients are strongly dependent upon the heat flux and saturation temperature. Moreover, the results suggest bet- ter thermal-hydraulic performance for R1234yf than the other two working fluids at the same saturation temperatures. With the new heat transfer and pressure drop correlations, agreements within ±25% were obtained for experimental data in similar experiments with high saturation temperatures. [less ▲]

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See detailMacroevolutionary patterns in sea breams, emperors and allies (Sparoidea, Acanthomorpha)
Santini, Francesco; Olivier, Damien ULg; Frederich, Bruno ULg

Poster (2017, January 07)

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See detailPollen nutrients better explain bumblebee colony development than pollen diversity
Moerman, Romain; Vanderplanck, Maryse ULg; Fournier, Denis et al

in Insect Conservation and Diversity (2017)

1. Bumblebees are valuable pollinators of numerous wild and cultivated plants. They can forage on variable pollen resources. As some pollen species lack particular nutrients or have global low nutritional ... [more ▼]

1. Bumblebees are valuable pollinators of numerous wild and cultivated plants. They can forage on variable pollen resources. As some pollen species lack particular nutrients or have global low nutritional quality, it has been suggested that bumblebees mix their pollen incomes to ensure a global balanced diet. The hypothesis that a mixed pollen diet better supports bumblebee colony development than a single pollen diet has been poorly explored. 2. We compared the impact of mono-, di- and trifloral diets on microcolony development of Bombus terrestris using three pollen resources with different nutrient contents (Cytisus scoparius, Erica sp. and Sorbus aucuparia) as well as their mixes. Nine parameters (e.g. pollen efficacy: total weight of larvae/total weight of pollen collection) were used to compare the microcolony performances. Moreover, we measured the influence of the pollen diversity and nutritional composition on relevant parameters. 3. We showed that microcolonies can potentially better develop on mixed pollen diets, but single pollen diet can also be as good as mixed pollen diet. Moreover, the sterol concentration appeared as a key factor to establish the impact of a pollen diet on the bumblebee colony development. 4. This study reveals that diverse pollen diet does not necessary equate with good colony development and supports the importance of selecting floral resources by considering their nutrient contents for bee conservation management. [less ▲]

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See detailSodium vanadium (III) fluorophosphate/carbon nanotubes composite (NVPF/CNT) prepared by spray-drying: good electrochemical performance thanks to well-dispersed CNT network within NVPF particles
Eshraghi, Nicolas ULg; Caes, Sebastien; Mahmoud, Abdelfattah ULg et al

in Electrochimica Acta (2017), 228

We successfully prepared NASICON-type Na3V2(PO4)2F3 (NVPF) and a Na3V2(PO4)2F3/carbon nanotubes (CNT) composite by spray-drying followed by heat treatment in argon for 2 hours at 600 °C. The addition of ... [more ▼]

We successfully prepared NASICON-type Na3V2(PO4)2F3 (NVPF) and a Na3V2(PO4)2F3/carbon nanotubes (CNT) composite by spray-drying followed by heat treatment in argon for 2 hours at 600 °C. The addition of CNT in the spray-drying solution creates a CNT network within the NVPF particles. After grinding, the smaller NVPF particles remain linked by CNT. Thanks to this conducting network, the composite powder displays competitive electrochemical performance when cycled against lithium in hybrid-ion batteries (2–4.6 V vs. Li+/Li) with specific capacities of 125 mAh.g−1 at C/10, 103 mAh.g−1 at 1C and 91 mAh.g−1 at 4C, together with 97.5% capacity retention at 1C over 100 cycles with coulombic efficiency of 99.4%. These results demonstrate that sodium vanadium (III) fluorophosphate electrode material can be obtained in a time-efficient way using the easily up-scalable spray-drying method. [less ▲]

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See detailImpact of Serious Games on Health and Well-being of Elderly: A Systematic Review
Nguyen, Thi Thanh Hai; Ishmatova, Diana; Tapanainen, Tommi ULg et al

in Proceedings of the 50th Hawaiian International Conference on Systems Sciences (2017, January 06)

Besides their entertainment value, serious games can have beneficial therapeutic effects for elderly people that improve their health and well-being. Games are likely to be accepted by elderly persons who ... [more ▼]

Besides their entertainment value, serious games can have beneficial therapeutic effects for elderly people that improve their health and well-being. Games are likely to be accepted by elderly persons who have enjoyed games their lives, and because there are more and more of such elderly, it is important to investigate games as a therapeutic device. This research reviewed the literature focusing on the effects of games on elderly persons in three main types of effects: physical, cognitive, and social effects. The majority of reviewed papers focused on physical and cognitive effects, and were published in recent years, which emphasizes the relative novelty of this topic and suggests that future research will need to address social impact as well. In addition, while many papers claimed positive impacts as a result of using games, our review found that more attention should be given to research designs. [less ▲]

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See detailA Framework for the Evaluation of Biosecurity, Commercial, Regulatory, and Scientific Impacts of Plant Viruses and Viroids Identified by NGS Technologies
Massart, Sebastien; Candresse, Thierry; Gil, Jose et al

in Frontiers in Microbiology (2017), 8(45),

Detailed reference viewed: 35 (6 ULg)
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See detailPatterns of body size and shape diversification in marine angelfishes (Pomacanthidae)
Frederich, Bruno ULg; Santini, Francesco; Konow, Nicolai et al

Conference (2017, January 06)

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See detailStromal Modulators of TGF-β in Cancer
Costanza, Brunella ULg; Umelo, Ijeoma ULg; Bellier, Justine ULg et al

in Journal of clinical Medicine (2017)

Transforming growth factor-β (TGF-β) is an intriguing cytokine exhibiting dual activities in malignant disease. It is an important mediator of cancer invasion, metastasis and angiogenesis, on the one hand ... [more ▼]

Transforming growth factor-β (TGF-β) is an intriguing cytokine exhibiting dual activities in malignant disease. It is an important mediator of cancer invasion, metastasis and angiogenesis, on the one hand, while it exhibits anti-tumor functions on the other hand. Elucidating the precise role of TGF-β in malignant development and progression requires a better understanding of the molecular mechanisms involved in its tumor suppressor to tumor promoter switch. One important aspect of TGF-β function is its interaction with proteins within the tumor microenvironment. Several stromal proteins have the natural ability to interact and modulate TGF-β function. Understanding the complex interplay between the TGF-β signaling network and these stromal proteins may provide greater insight into the development of novel therapeutic strategies that target the TGF-β axis. The present review highlights our present understanding of how stroma modulates TGF-β activity in human cancers [less ▲]

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See detailCompte rendu de Lavocat (Françoise), Fait et fiction, Paris, Seuil, "Poétique", 2016, 618p.
Huppe, Justine ULg

in COnTEXTES : Revue de Sociologie de la Littérature (2017)

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See detailImage quality in Coronary CT Angiography: Challenges and technical solutions.
Ghekiere, Olivier; Salgado, Rodrigo; Buls, Nico et al

in British Journal of Radiology (2017)

Multidetector CT angiography has become a widely accepted examination for non-invasive evaluation of the heart and coronary arteries. Despite its ongoing success and worldwide clinical implementation, it ... [more ▼]

Multidetector CT angiography has become a widely accepted examination for non-invasive evaluation of the heart and coronary arteries. Despite its ongoing success and worldwide clinical implementation, it remains an often-challenging procedure in which image quality, and hence diagnostic value, is determined by both technical and patient-related factors. Thorough knowledge of these factors is important to obtain high quality examinations. In this review, we discuss several key elements that may adversely affect coronary CT angiography image quality as well as potential measures that can be taken to mitigate their impact. In addition, several recent vendor-specific advances and future directions to improve image quality are discussed. [less ▲]

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