Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailThe role of mesenchymal stem cells in the treatment of ulcerative colitis and Crohn's disease
GREGOIRE, Céline ULg; Louis, Edouard ULg; BRIQUET, Alexandra ULg et al

in Atkinson, K; Ed (Eds.) The Biology and Therapeutic Applications of Mesenchymal Cells (2017)

Detailed reference viewed: 128 (66 ULg)
Full Text
Peer Reviewed
See detailFormaliser le trope : De la subjectivité linguistique à la subjectivité épilinguistique
Mathy, Adrien ULg

in Signata. Annales des Sémiotiques = Annals of Semiotics (2017)

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
See detailUsefulness of multi-breed models in genetic evaluation of direct and maternal calving ease in Holstein and Belgian Blue Walloon purebreds and crossbreds
Vanderick, Sylvie ULg; Gillon, Alain; Glorieux, Géry et al

in Livestock Science (2017)

The objective of this study was to verify the feasibility of a joint genetic evaluation system for calving ease trait of Belgian Blue (BBB) and Holstein (HOL) Walloon cattle based on data of purebred and ... [more ▼]

The objective of this study was to verify the feasibility of a joint genetic evaluation system for calving ease trait of Belgian Blue (BBB) and Holstein (HOL) Walloon cattle based on data of purebred and crossbred animals. Variance components and derived genetic parameters for purebred BBB and HOL animals were estimated by using single-breed linear animal models. This analysis showed clear genetic differences between breeds. Estimates of direct and maternal heritabilities (± standard error) were 0.34 (±0.02) and 0.09 (±0.01) for BBB, respectively, but only 0.09 (±0.01) and 0.04 (±0.01) for HOL, respectively. Moreover, a significant negative genetic correlation between direct and maternal effects was obtained in both breeds: −0.46 (±0.04) for BBB and −0.29 (±0.11) for HOL. Variance components and derived genetic parameters for purebred BBB and HOL and crossbred BBB ×× HOL cattle were then estimated by using two multi-breed linear animal models: a multi-breed model based on a random regression test-day model (Model MBV), and a multi-breed model based on the random regression multi-breed model (Model MBSM). Both multi-breed models use different functions of breed proportions as random regressions, thereby enabling modelling different additive effects according to animal's breed composition. The main difference between these models is the way in which relationships between breeds are accounted for in the genetic (co)variance structure. Genetic parameters differed between single-breed and multi-breed analysis, but are similar to the literature. For BBB, estimates of direct and maternal heritabilities (±SE) were 0.45 (±0.07) and 0.08 (±0.01) by using Model MBV, and 0.45 (±0.08) and 0.09 (±0.02) for Model MBSM, respectively. For HOL, these estimates were 0.18 (±0.04) and 0.05 (±0.01) using Model MBV, and 0.16 (±0.04) and 0.05 (±0.01) for Model MBSM, respectively. Reliability gains (up to 25%) indicated that the use of crossbred data in the multi-breed models had a positive influence on the estimation of genetic merit of purebred animals. A slight re-ranking of purebred sires and maternal grandsires was observed between single-breed and multi-breed models. Moreover, both multi-breed models can be considered as quasi-equivalent models because they performed almost equally well with respect to MSE and correlations, for purebred and crossbred animals. [less ▲]

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailMesenchymal stromal cell therapy for inflmmatory bowel diseases
GREGOIRE, Céline ULg; LECHANTEUR, Chantal ULg; BRIQUET, Alexandra ULg et al

in Alimentary Pharmacology & Therapeutics (2017), 45

Background Inflammatory bowel diseases (IBD) are chronic relapsing diseases in which pro-inflammatory immune cells and cytokines induce intestinal tissue damage and disability. Mesenchymal stromal cells ... [more ▼]

Background Inflammatory bowel diseases (IBD) are chronic relapsing diseases in which pro-inflammatory immune cells and cytokines induce intestinal tissue damage and disability. Mesenchymal stromal cells (MSCs) exert powerful immunomodulatory effects and stimulate tissue repair. Aim To review the current data on mesenchymal stromal cell therapy in IBD. Method We searched PubMed and ‘ClinicalTrials.gov’ databases using the terms ‘mesenchymal stromal cells’, ‘mesenchymal stem cell transplantation’, ‘inflammatory bowel diseases’, ‘Crohn disease’ and ‘colitis, ulcerative’. Additional publications were identified from individual article reference lists. Results MSCs include inhibition of Th1/Th17 lymphocytes and recruitment of regulatory T lymphocytes, induction of antigen-presenting cells into a regulatorylike profile, and stimulation of epithelial cell differentiation and proliferation. More than 200 patients with refractory fistulas have been treated with local injections of MSCs, resulting in complete response in more than half, and in overall response in approximately two thirds of patients. In refractory luminal Crohn’s disease, 49 cases of systemic MSC infusions have been reported, while trials with autologous MSCs resulted in mitigated responses, studies using allogeneic MSCs were promising, with around 60% of patients experiencing a response and around 40% achieving clinical remission. Conclusions Mesenchymal stromal cells might represent a promising therapy for IBD, especially for Crohn’s disease. There remain many unsolved questions concerning the optimal origin and source of mesenchymal stromal cells, dosage and modalities of administration. Moreover, mesenchymal stromal cells still need to prove their effectiveness compared with conventional treatments in randomised controlled trials. [less ▲]

Detailed reference viewed: 11 (2 ULg)
Full Text
Peer Reviewed
See detailRoad and intermodal transport performance: the impact of operational costs and air pollution external costs
Mostert, Martine ULg; Caris, An; Limbourg, Sabine ULg

in Research in Transportation Business & Management (2017)

The transportation of goods is essential for the economy, but it also contributes to air pollution which, in turn, affects human health. These negative impacts generate additional costs for society that ... [more ▼]

The transportation of goods is essential for the economy, but it also contributes to air pollution which, in turn, affects human health. These negative impacts generate additional costs for society that are not necessarily taken into account in public transportation policies and in private transportation decisions of companies and individuals. This leads to inefficient transportation systems where the social equilibrium is not reached. Intermodal transport is promoted by the European Commission to reduce these negative externalities. The objective of this paper is to analyze at a strategic level the effect on modal split between road, intermodal rail and intermodal inland waterway transport of several economic or environmental policies. An intermodal allocation model is applied to the Belgian case in order to identify the modal split changes between the single minimization of costs (operational or health-related external) and the introduction of additional road taxes. [less ▲]

Detailed reference viewed: 9 (1 ULg)
Full Text
Peer Reviewed
See detailA robust statistical approach to select adequate error distributions for financial returns
Hambuckers, julien ULg; Heuchenne, Cédric ULg

in Journal of Applied Statistics (2017), 44(1), 137-161

In this article, we propose a robust statistical approach to select an appropriate error distribution, in a classical multiplicative heteroscedastic model. In a first step, unlike to the traditional ... [more ▼]

In this article, we propose a robust statistical approach to select an appropriate error distribution, in a classical multiplicative heteroscedastic model. In a first step, unlike to the traditional approach, we don't use any GARCH-type estimation of the conditional variance. Instead, we propose to use a recently developed nonparametric procedure (Mercurio and Spokoiny, 2004): the Local Adaptive Volatility Estimation (LAVE). The motivation for using this method is to avoid a possible model misspecification for the conditional variance. In a second step, we suggest a set of estimation and model selection procedures (Berk-Jones tests, kernel density-based selection, censored likelihood score, coverage probability) based on the so-obtained residuals. These methods enable to assess the global fit of a set of distributions as well as to focus on their behavior in the tails, giving us the capacity to map the strengths and weaknesses of the candidate distributions. A bootstrap procedure is provided to compute the rejection regions in this semiparametric context. Finally, we illustrate our methodology throughout a small simulation study and an application on three time series of daily returns (UBS stock returns, BOVESPA returns and EUR/USD exchange rates) [less ▲]

Detailed reference viewed: 78 (12 ULg)
Full Text
Peer Reviewed
See detailDon't judge a fish by its fins: species delineation of Congolese Labeo (Cyprinidae)
Van Steenberge, Maarten; Gajdzik, Laura ULg; Chilala, Alex et al

in Zoologica Scripta (2016)

Conspicuous characters are often useful in species identification. Yet, identification and delineation are two different processes, and such characters do not necessarily provide the best basis on which ... [more ▼]

Conspicuous characters are often useful in species identification. Yet, identification and delineation are two different processes, and such characters do not necessarily provide the best basis on which species can be delineated. This is illustrated by the case of the Labeo with papillary lips from the Congo basin. Traditionally, species delineation in this group was based on a conspicuous trait: the shape of the dorsal fin, which shows a profound degree of differentiation. Morphometric analyses were performed on 185 specimens both with and without measurements taken on this fin. The groups obtained using these two approaches were compared with those obtained through DNA barcoding. For this, 24 sequences of the standard barcoding COI gene were obtained. Species delineations based on morphological and molecular results were in agreement when the shape of the dorsal fin was ignored. This suggested that of the five nominal species known from the Congo basin, L. altivelis, L. rosae, L. lineatus, L. weeksii and L. maleboensis, only the former three remain valid. Consequently, L. weeksii was synonymised with L. altivelis and L. maleboensis with L. lineatus. The sole Congo basin endemic is L. lineatus as L. altivelis and L. rosae also occur in more southern basins. The use of the shape of the dorsal fin in morphological studies has previously led to overestimates of species diversity in this group. This is due to the fact that L. altivelis shows a remarkable amount of geographical variation for this trait. The large amount of intra- and interspecific variation in this character was caused by differential allometric growth in different parts of the dorsal fin. [less ▲]

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
See detailComprehension of an organosolv process for lignin extraction on Festuca arundinacea and monitoring of the cellulose degradation
Schmetz, Quentin ULg; Maniet, Guillaume ULg; Jacquet, Nicolas ULg et al

in Industrial Crops and Products (2016), 94

It is commonly accepted that the current society needs to partially substitute fossil resources by renewable ones. Among many solutions, one approach consists in the development of biorefinery involving ... [more ▼]

It is commonly accepted that the current society needs to partially substitute fossil resources by renewable ones. Among many solutions, one approach consists in the development of biorefinery involving lignocellulosic biomass to produce bio-based materials and fuels. This study focuses on the comprehension of an organosolv treatment designed to break the complex lignocellulosic structure for high purity lignin extraction from tall fescue (Festuca arundinacea Schreb.). This grass benefits from an increasing interest in Western Europe and has been suggested as feedstock for biorefinery. However, its use as material for high purity lignin production has not been determined yet. Ethanol/water, 92/8% [v/v] with H2SO4 0.32 M was investigated at pilot scale under conventional heating (5 °C min−1 during 30 min and stabilized at 148 °C for 5 min). Precipitated lignin were analyzed as well as the composition of side-stream products (recovered cellulosic pulp and the aqueous hydrolysate). Lignin has been recovered at a purity level of 90% with a yield of 60%. The main contaminants were nitrogen containing compounds and degraded hemicelluloses. 2D-HSQC NMR (Two Dimension-Heteronuclear Single Quantum Correlation Nuclear Magnetic Resonance) revealed a co-extraction of ferulates and coumarates function as well as arabinoxylan. Cellulose was recovered at 53% purity with 60% yield. The conditions appear to be too harsh for tall fescue and led to significant amount of cellulose degradation. A process using a lower alcohol concentration will be developed to provide better yields of both cellulose and lignin. [less ▲]

Detailed reference viewed: 66 (16 ULg)
Full Text
Peer Reviewed
See detailContinuous Production of Itraconazole-based Solid Dispersions by Hot Melt Extrusion: Preformulation, Optimization and Design Space Determination.
Thiry, Justine ULg; Lebrun, Pierre; Vinassa, Chloé et al

in International Journal of Pharmaceutics (2016), 515(1-2), 114-124

Detailed reference viewed: 47 (9 ULg)
Full Text
Peer Reviewed
See detailInterpellation du genre et sujets mélancoliques. Butler lectrice d’Althusser
Borotto, Jessica ULg

in Cahiers du GRM (2016), 8

Cet article propose d’explorer la manière dont Judith Butler remobilise la thèse althussérienne de l’interpellation dans La Vie psychique du pouvoir . Nous essaierons de saisir les éléments qui nous ... [more ▼]

Cet article propose d’explorer la manière dont Judith Butler remobilise la thèse althussérienne de l’interpellation dans La Vie psychique du pouvoir . Nous essaierons de saisir les éléments qui nous paraissent enrichir la problématique althussérienne, suggérant que la compréhension de la dimension psychique du pouvoir qui ressort de sa lecture permet de complexifier la relation du sujet au pouvoir. Afin de tisser des liens précis entre l’interpellation chez Althusser et la subjectivation chez Butler, nous examinerons d’abord le rôle que Nietzsche et Foucault recouvrent dans la formulation de la théorie de la subjectivation chez Butler. Ensuite, il s’agit de comprendre en quoi la matérialité et l’ambiguïté des mécanismes de subjectivation, qui déjà caractérisent l’interpellation althussérienne, deviennent chez Butler les sources d’une relation critique aux conditions d’émergence du sujet. Enfin nous préciserons comment elle mobilise de telles sources pour élaborer cette figure de la psychanalyse qu’est la mélancolie et pour décrire sa transformation en deuil. [less ▲]

Detailed reference viewed: 18 (1 ULg)
Full Text
Peer Reviewed
See detailIs Competence a Holy Grail for Teaching? Reflections on Nursing Education
Dancot, Jacinthe ULg

in Nursing & Care Open Access Journal (2016), 1(4), 00021

The competence-based approach is largely widespread in the nursing schools and is viewed as a golden standard for professional teaching. But the practical use of the concept is varying among institutions ... [more ▼]

The competence-based approach is largely widespread in the nursing schools and is viewed as a golden standard for professional teaching. But the practical use of the concept is varying among institutions and even teachers. The goal of this narrative review is to clarify the conception of competence and its use in the fields of education and nursing. Regarding education, Gonczi, Tardif, Jonnaert and Beckers are the key authors referred to. A first apparent consensus over the holistic nature of the competence quickly gives place to the observation of important nuances in conceptions. Similarly, in the field of nursing, Benner is first discussed, and recent literature reviews and concept analyses are taken into account: similar nuances are detected, as well as difficulties in the practical implementation of the concept. Considering the lack of consensus and the paradigmaticalincoherences detected among the sources consulted for this review, we question the use of competence as single point of view for teaching and assessing, and we propose other avenues to be explored in order to recognize emergent professionality. [less ▲]

Detailed reference viewed: 308 (2 ULg)
Full Text
Peer Reviewed
See detailLearning from Incidents and Incident Reporting: Safety Governance at a Belgian Nuclear Research Center
Rossignol, Nicolas ULg; Van Oudheusden, Michiel ULg

in Science, Technology & Human Values (2016), Online First

This article examines how incidents are governed in a Belgian Nuclear Research Center by way of an incident reporting system named REX. Drawing on a documentary analysis of incident reports, interviews ... [more ▼]

This article examines how incidents are governed in a Belgian Nuclear Research Center by way of an incident reporting system named REX. Drawing on a documentary analysis of incident reports, interviews and focus groups with personnel, it illustrates how REX enacts a safety governmentality centered on identifying incident causes and culprits. As this governmentality mode obscures the epistemic and political character of incidents, it closes down important opportunities for collective learning about safety and safety governance. It is argued that joint reflection about incidents and resistances towards incident reporting serve as fruitful starting points for a more reflexive safety governance that makes explicit how decisions are made in high-risk contexts. Social scientists can enhance governance of this kind by pointing to different perceptions and evaluations of incidents and by insisting that contending interpretations are confronted and accounted for. [less ▲]

Detailed reference viewed: 16 (3 ULg)
Full Text
Peer Reviewed
See detailScreening transplant donors for HTLV-1 and -2
Gallo, Robert; Willems, Luc ULg; Hasegawa, 4 Hideki et al

in Blood (2016), 128(26),

Detailed reference viewed: 10 (1 ULg)
Full Text
Peer Reviewed
See detailNeuromuscular blockade as part of an anaesthetic protocol for cataract surgery in an alpaca
Tutunaru, Alexandru-Cosmin ULg; Storms, Goedele ULg; Monclin, Sébastien ULg et al

in Journal of Camelid Science (2016), 9

A six-month-old alpaca was presented to the veterinary teaching hospital of the University of Liège (Belgium) with a bilateral cataract. A decision was made to perform bilateral cataract surgery after an ... [more ▼]

A six-month-old alpaca was presented to the veterinary teaching hospital of the University of Liège (Belgium) with a bilateral cataract. A decision was made to perform bilateral cataract surgery after an ocular ultrasound and electroretinogram were performed to assess the posterior segment and retinal function, respectively. As a premedication, the alpaca received xylazine, butorphanol and midazolam intramuscularly. Anaesthesia was induced subsequently with ketamine and midazolam intravenously and maintained with isoflurane on oxygen/air mixture. The alpaca was mechanically ventilated during surgery. Neuromuscular blockade was induced and maintained with cis-atracurium intravenously. The dose of cis-atracurium was permanently adapted using a peripheral nerve stimulator. This case report brings new knowledge regarding the use and dosage of cis-atracurium in alpacas. [less ▲]

Detailed reference viewed: 16 (4 ULg)
Full Text
Peer Reviewed
See detailEditorial
Borotto, Jessica ULg; Petteni, Oriane ULg; Wustefeld, Sophie ULg et al

in Cahiers du GRM (2016), 10

Detailed reference viewed: 16 (6 ULg)
Full Text
Peer Reviewed
See detailEffect of the Extraction Technique, Heating Time and Cryogenic Grinding (N2 at -196°C) on the Composition of Cumin Seeds Volatile Oil
Mékaoui, R; Benkaci-Ali, Farid; Scholl, Georges ULg et al

in Journal of Essential Oil-Bearing Plants [=JEOBP] (2016), 19(8), 1903-1919

Two techniques of extraction of essential oils (Steam distillation assisted by microwave (SDAM) and hydrodistillation assisted by microwave (HDAM)) are respectively advanced steam distillation (SD) and ... [more ▼]

Two techniques of extraction of essential oils (Steam distillation assisted by microwave (SDAM) and hydrodistillation assisted by microwave (HDAM)) are respectively advanced steam distillation (SD) and hydrodistillation techniques (HD), in which a microwave oven is used in the extraction process. They are considered as accelerated techniques extraction performed at atmospheric pressure. The cryogrinding (CG) showed a difference on the yields and aromatic profile comparing to the sample grinding. Isolation and concentration of volatile compounds are performed by a single stage for the extraction of volatile oil from Algerian (Sahara) Cuminum cyminum seeds (CCS). The chemical composition of the essential oil of this plant as a function of extraction time was also studied. The major components and family classes showed a significant variation with the extraction time. Gas chromatography (GC), GCxGC-mass spectrometry (GCxGC-MS)] were utilised for qualitative and quantitative analysis of essential oils extracted by these two methods. The major compounds are cumin aldehyde (HDAM-CG: 20.50-53.35 %, SDAM-CG: 21.68 66.6 %), p-cymene (HDAM-CG: 14.1-37.54 %, SDAM-CG: 6.06-20.18 %), β-pinene (HDAM-CG: 4.53-14.74 %, SDAM-CG: 4.3-32.65 %) and γ-terpinene (HDAM-CG: 1.26-14.70 %, SDAM-CG: 5.13-18.23 %). [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailSU(3) flavor symmetry breaking in large $N_c$ excited baryons
Stancu, Floarea ULg

in Physical Review. D : Particles and Fields (2016), 94

The $1/N_c$ expansion method for studying the mass spectrum of excited baryons is shortly reviewed together with applications to mixed symmetric states. The $[{\bf 70, \ell^+}]$ multiplet, belonging to ... [more ▼]

The $1/N_c$ expansion method for studying the mass spectrum of excited baryons is shortly reviewed together with applications to mixed symmetric states. The $[{\bf 70, \ell^+}]$ multiplet, belonging to the $N$ = 2 band, is reanalyzed, with emphasis on hyperons and the SU(3) symmetry breaking operators entering the mass formula to first order. An important result is that the hierarchy of masses as a function of strangeness is correctly reproduced for all multiplets. Predictions for unknown excited hyperons to SU(6) $\times$ O(3) multiplets are made. [less ▲]

Detailed reference viewed: 10 (2 ULg)