Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailModulating effect of COMT genotype on the brain regions underlying proactive control process during inhibition
Jaspar, Mathieu ULg; Genon, Sarah ULg; Muto, Vincenzo ULg et al

in Cortex : A Journal Devoted to the Study of the Nervous System & Behavior (2014), 50

Introduction. Genetic variability related to the catechol-O-methyltransferase (COMT) gene (Val158Met polymorphism) has received increasing attention as a possible modulator of cognitive control functions ... [more ▼]

Introduction. Genetic variability related to the catechol-O-methyltransferase (COMT) gene (Val158Met polymorphism) has received increasing attention as a possible modulator of cognitive control functions. Methods. In an event-related fMRI study, a modified version of the Stroop task was administered to three groups of 15 young adults according to their COMT Val158Met genotype [Val/Val (VV), Val/Met (VM) and Met/Met (MM)]. Based on the theory of dual mechanisms of control (Braver, et al., 2007), the Stroop task has been built to induce proactive or reactive control processes according to the task context. Results. Behavioral results did not show any significant group differences for reaction times but Val allele carriers individuals are less accurate in the processing of incongruent items. fMRI results revealed that proactive control is specifically associated with increased activity in the anterior cingulate cortex (ACC) in carriers of the Met allele, while increased activity is observed in the middle frontal gyrus (MFG) in carriers of the Val allele. Conclusion. These observations, in keeping with a higher cortical dopamine level in MM individuals, support the hypothesis of a COMT Val158Met genotype modulation of the brain regions underlying proactive control, especially in frontal areas as suggested by Braver et al. [less ▲]

Detailed reference viewed: 46 (18 ULg)
See detailLa mécanique du détail. Approches transversales
Hagelstein, Maud ULg; Belloi, Livio ULg

Book published by Editions de l'Ecole Normale Supérieure de Lyon (2014)

Parce qu’elle a trait aux relations nouées entre les parties et l’ensemble qui les comprend, la question du détail s’investit d’enjeux considérables pour toute tentative de réflexion interdisciplinaire ... [more ▼]

Parce qu’elle a trait aux relations nouées entre les parties et l’ensemble qui les comprend, la question du détail s’investit d’enjeux considérables pour toute tentative de réflexion interdisciplinaire. En effet, dans les disciplines qui s’attachent à rendre un objet visible ou lisible, les théoriciens rencontrent à l’endroit du détail des problèmes voisins, sinon analogues, que nous voudrions ici aborder de front, dans une perspective forcément « rapprochée » et plus que jamais attentive à des objets singuliers, que ceux-ci relèvent de la littérature, du cinéma, de la photographie, de la bande dessinée, de la peinture, de la philosophie, etc. À confronter nos méthodes et les présupposés sur lesquels elles reposent, il nous a semblé possible de cerner plus finement le mode de fonctionnement propre au détail. Certes, chacun fera part ici de ses étonnements particuliers ; de même, chacun sera amené à faire rapport des découvertes enthousiasmantes ou perturbantes qui, dans son domaine spécifique, auront innervé le travail de réflexion. Pourtant, il aurait été inutile de vouloir dresser une simple liste de détails, recueillis au sein d’une compilation bariolée et forcément non exhaustive. Adoptant une perspective plus large, le présent ouvrage vise à une compréhension approfondie de la mécanique du détail (extrait de l'Avant-propos, L. Belloï & M. Hagelstein). [less ▲]

Detailed reference viewed: 55 (2 ULg)
Full Text
See detailHand dermometrology
PIERARD, Gérald ULg; Pierard, Sébastien ULg; Franchimont, Claudine ULg et al

in Alikhan, A.; Lachapelle, J.M.; Maibach, M.I. (Eds.) Textbook of hand eczema. (2014)

Detailed reference viewed: 7 (0 ULg)
Full Text
See detailLuis Buñuel, au-delà du cinéma
Küpper, Achim ULg

Book published by P.I.E. Peter Lang (2014)

Detailed reference viewed: 10 (0 ULg)
Full Text
See detailVerrat am 'Original'? Fälschung, Kopie und Auslöschung in Anthony Minghellas Film "The Talented Mr. Ripley"
Küpper, Achim ULg

in Brittnacher, Hans Richard (Ed.) Der Verräter (2014)

Detailed reference viewed: 14 (0 ULg)
Full Text
Peer Reviewed
See detailThe effect of size, weight, body compartment, sex and reproductive status on the bioaccumulation of 19 trace elements in rope-grown Mytilus galloprovincialis
Richir, Jonathan ULg; Gobert, Sylvie ULg

in Ecological Indicators (2014), 36

Numerous trace elements (TEs) can be considered as potential pollutants of the environment, their mining productions and industrial uses increasing worldwide. Their monitoring can be achieved through the ... [more ▼]

Numerous trace elements (TEs) can be considered as potential pollutants of the environment, their mining productions and industrial uses increasing worldwide. Their monitoring can be achieved through the use of bioindicator species, such as the Mediterranean mussel Mytilus galloprovincialis (Lamarck, 1819). That species has been widely used to monitor the chemical pollution of coastal ecosystems by Cr, Ni, Cu, Zn, Cd, Pb, As, Ag and V. Conversely, environmental levels of Be, Al, Fe, Mn, Co, Se, Mo, Sn, Sb and Bi have been little or not monitored so far in mussel watch programs. Bioaccumulation processes of these 19 TEs in rope-grown M. galloprovincialis purchased from a salt pond with good chemical water quality were thus investigated in the present study. Mussels efficiently accumulated the 19 studied TEs. Bioaccumulation processes were driven by numerous mutually dependent biological parameters such as the mussel size and flesh weight, the sex and the reproductive status and the body compartment considered. TE bioaccumulation was a power function of the mussel soft body dry weight; total contents linearly increased with the shell length. Small-size mussels overall concentrated more TEs, with a high inter-individual variability, consequently influencing the modelling of their bioaccumulation in the whole rope population. Although a large range of rope-grown M. galloprovincialis sizes can be used for monitoring purposes, one will thus take care not to use extreme size individuals. The influence of gametogenesis in determining female body higher TE concentrations prior to spawning could not be neglected and varied depending on the element. TEs were preferentially accumulated in the hepatopancreas, except for Zn, Se, Cd and Mo, more concentrated in gills. Gametogenesis did not influence TE distribution between body compartments, but likely diluted their concentrations as a direct consequence of massive reproductive tissue production. So, results from the present study underline the potential use of M. galloprovincialis in the biomonitoring of numerous little studied TEs and give some insights into the decisive role played by some relevant biological parameters in bioaccumulation processes of the 19 investigated TEs in rope-grown mussels. [less ▲]

Detailed reference viewed: 57 (23 ULg)
Full Text
Peer Reviewed
See detailThe relevance of the cooperative model in the field of renewable energy
Huybrechts, Benjamin ULg; Mertens de Wilmars, Sybille ULg

in Annals of Public and Cooperative Economics = Annales de l'Economie Publique, Sociale et Coopérative (2014), 85(2),

This article examines the relevance of the cooperative model in the field of renewable energy (RE). RE sources have been developed since the end of the 1970s and their growth has been expansive since then ... [more ▼]

This article examines the relevance of the cooperative model in the field of renewable energy (RE). RE sources have been developed since the end of the 1970s and their growth has been expansive since then. While social-ecological movements have been instrumental in shifting the public attention towards the need for alternative energies (Sine and Lee, 2009), in most countries the sector has rapidly become dominated by corporate actors experienced in building large-scale RE projects. In an attempt to counter the corporate hegemony and to protect available lands, a range of citizen initiatives have emerged under different forms and names such as community energy groups or renewable energy (source) cooperatives (van der Horst, 2008; Willis and Willis, 2012; Lipp et al., 2012; Schreuer and Weismeier-Sammer, 2010; Weismeier-Sammer and Reiner, 2011). Pioneering examples include EWS in Germany, Enercoop in France, Energy4All in the UK, or Ecopower in Belgium. As these citizen groups tend to adopt the cooperative model, or a related form depending on the local legislation and context, it seems important to understand what are the specific features, assets and limitations of this model in the field of RE. Indeed, while ‘traditional’ cooperatives operating for a long time in fields such as banking, agriculture, or retail, have received an important attention in the cooperative literature, much work still needs to be done to understand why and how cooperatives emerge either in fields in which they have not traditionally been widespread (such as health and care, services, etc.), or in ‘new’ fields or sub-fields (such as fair trade, microfinance or renewable energy). Research is even more needed insofar as ‘new’ cooperatives tend to differ from traditional ones in several ways, for instance through the involvement of multiple stakeholders (rather than a dominant one such as producers, consumers or workers) or through a stronger orientation towards general interest goals (beyond traditional mutual interest at the basis of most cooperatives). While RE cooperatives have strongly developed in countries such as Denmark (Lipp et al., 2012), Germany (Schreuer, 2012; Weismeier-Sammer and Reiner, 2011) and to a lesser extent the UK (Aitken, 2010; Kellett, 2007; Seyfang et al., 2012; van der Horst, 2008; Willis and Willis, 2012; Walker et al., 2007), their development has been much slower in other countries, particularly Southern Europe (Lipp et al., 2012). This seems to echo, to a certain extent, the general development of RE in these countries (Haas et al., 2011). Before mapping these differences against the background of RE development in these countries, it is necessary to understand how the assets and limits of the cooperative model apply to the particular case of RE. This is precisely the aim of this article. On the one hand, the assets of the cooperative model enable to understand why this form has been adopted by citizen groups and has developed in certain countries. On the other hand, the limits or weaknesses of the model enable to explain why cooperatives are still a minority in the field of RE and why their development is constrained by obstacles in certain countries. [less ▲]

Detailed reference viewed: 147 (9 ULg)
Full Text
Peer Reviewed
See detailPerceiving the ordinary : a study of everyday landscapes in Belgium
Vanderheyden, Vincent ULg; van der Horst; Van Rompaey, Anton et al

in Tijdschrift voor Economische en Sociale Geografie = Journal of Economic & Social Geography (2014)

Detailed reference viewed: 46 (23 ULg)
Full Text
Peer Reviewed
See detailMultifactorial Relationship Between 18F-Fluoro-Deoxy-Glucose Positron Emission Tomography Signaling and Biomechanical Properties in Unruptured Aortic Aneurysms
NCHIMI LONGANG, Alain ULg; CHERAMY-BIEN, Jean-Paul ULg; Gasser, T. Christian et al

in Circulation. Cardiovascular imaging (2014), 7

BACKGROUND: -The relationship between biomechanical properties and biological activities in aortic aneurysms was investigated with finite element simulations (FES) and 18F-fluoro-deoxyglucose (18F-FDG ... [more ▼]

BACKGROUND: -The relationship between biomechanical properties and biological activities in aortic aneurysms was investigated with finite element simulations (FES) and 18F-fluoro-deoxyglucose (18F-FDG) positron emission tomography (PET). METHODS AND RESULTS: -The study included 53 patients (45 males) with aortic aneurysms, 47 infrarenal (AAA) and 6 thoracic (TAA), who had at least one 18F-FDG PET/computed tomography. Over a 30-month period, more clinical events occurred in patients with increased 18F-FDG uptake on their last examination than in those without (5/18 (28%) vs. 2/35 (6%); P=0.03). Wall stress and stress/strength index computed by FES and 18F-FDG uptake were evaluating a total of 68 examinations. 25 (38%) examinations demonstrated at least one aneurysm wall area of increased 18F-FDG uptake. The mean number of these areas per examination was 1.6 (18/11) in TAAs vs. 0.25 (14/57) in AAAs, while the mean number of increased uptake areas co-localizing with highest wall stress and stress/strength index areas was 0.55 (6/11) and 0.02 (1/57), respectively. Quantitatively, 18F-FDG PET uptake correlated positively with both wall stress and stress/strength index (P<0.05). 18F-FDG uptake was particularly high in subjects with personal history of angina pectoris and familial aneurysm. CONCLUSIONS: -Increased 18F-FDG PET uptake in aortic aneurysms is strongly related to aneurysm location, wall stress as derived by FES and patient's risk factors such as acquired and inherited susceptibilities. [less ▲]

Detailed reference viewed: 15 (5 ULg)
Peer Reviewed
See detailThe Horn of Africa, the Factors of a Unity. Wars, Cultures and Imperialisms (19-20th centuries)
Genin, Vincent ULg

in Literatures of the Horn of Africa (Ethiopia, Eritrea, Somalia, Djibouti) : Beyond the Language and the Territory (2014)

Detailed reference viewed: 72 (6 ULg)
Full Text
Peer Reviewed
See detailEtudes des propriétés psychométriques de la CES-D sur un échantillon d'adolescents francophones scolarisés
Boulard, Aurore ULg; Gauthier, Jean-Marie ULg; Born, Michel ULg

in L'Encéphale (2014)

L’objectif de cet article est d’étudier et valider la version francaise de l’échelle de dépression Center for Epidemiologic Studies Depression Scale (CES-D) mise au point par Radloff (en 1977) dans une ... [more ▼]

L’objectif de cet article est d’étudier et valider la version francaise de l’échelle de dépression Center for Epidemiologic Studies Depression Scale (CES-D) mise au point par Radloff (en 1977) dans une population d’adolescents scolarisés. [less ▲]

Detailed reference viewed: 35 (19 ULg)
Full Text
Peer Reviewed
See detailNutritive value of tropical forage plants fed to pigs in the Western provinces of the Democratic Republic of the Congo
Kambashi Mutiaka, Bienvenu ULg; Picron, Pascale ULg; Boudry, Christelle ULg et al

in Animal Feed Science & Technology (2014), 191

The nutritive value of 20 forage plants commonly used for feeding pigs in the Democratic Republic of the Congo was studied to determine chemical composition, protein amino acid profiles, mineral content ... [more ▼]

The nutritive value of 20 forage plants commonly used for feeding pigs in the Democratic Republic of the Congo was studied to determine chemical composition, protein amino acid profiles, mineral content, and in vitro digestibility using a two-step method combining an enzymatic pepsin and pancreatin hydrolysis followed by a 72 h gas-test fermentation. The highest protein contents (270–320 g/kg DM) were obtained for Vigna unguiculata, Psophocarpus scandens, Leucaena leucocephala, Manihot esculenta, and Moringa oleifera. Grasses, Acacia mangium, and Eichhornia crassipes, showed the lowest crude protein (CP) and highest NDF contents. Cajanus cajan and Trypsacum andersonii had the most balanced amino acid profile, being deficient in lysine and slightly deficient in histidine, while Megathyrsus maximus displayed the highest number of essential amino acids deficiencies. High mineral contents were obtained from, in ascending order, with M. oleifera, V. unguiculata, E. crassipes, Ipomea batatas and Amaranthus hybridus. In vitro dry matter digestibility ranged from 0.25 to 0.52, in vitro CP digestibility from 0.23 to 0.80, in vitro energy digestibility from 0.23 to 0.52. M. esculenta, M. oleifera, I. batatas, Mucuna pruriens, V. unguiculata, P. scandens and A. hybridus showed high digestibilities for all nutrients. Gas production during fermentation of the pepsin and pancreatin-indigestible fraction of the plants varied from 42 ml/g DM for A. mangium to 202 ml/g DM for I. batatas (P<0.001). Short-chain fatty acid production during fermentation varied from 157 to 405 mg/g of the pepsin and pancreatin indigestible fraction. It is concluded that some of these species are interesting sources of proteins and minerals with a good digestibility that might be used more economically than concentrate, especially in smallholder production systems, to improve pig feeding, mineral intake and intestinal health in pigs reared in the tropics. [less ▲]

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailHigher long-lasting ethanol sensitization after adolescent ethanol exposure in mice
Quoilin, Caroline; Didone, Vincent ULg; Tirelli, Ezio ULg et al

in Psychopharmacology (2014), 231

Rationale. Due to their maturing brain, adolescents are suggested to be more vulnerable to the long-term consequences of chronic alcohol use. Increased sensitization to the stimulant effects of ethanol is ... [more ▼]

Rationale. Due to their maturing brain, adolescents are suggested to be more vulnerable to the long-term consequences of chronic alcohol use. Increased sensitization to the stimulant effects of ethanol is a possible consequence of ethanol exposure during adolescence. Objectives. The aim of this study was to characterize the long-term alterations in the stimulant effects of ethanol and in the rate of ethanol sensitization in mice pre-exposed to ethanol during adolescence in comparison to mice pre-exposed to ethanol in adulthood. Methods. Adolescent and adult female SWISS mice were injected with saline or ethanol (2.5 or 4 g/kg) during 14 consecutive days. After a three weeks period of ethanol abstinence, mice were tested as adults before and after a second exposure to daily repeated ethanol injections. Results. All mice pre-exposed to ethanol as adults or adolescents showed higher stimulant effects when re-exposed to ethanol three weeks later. However, this enhanced sensitivity to the stimulant effects of ethanol was of significantly higher magnitude in mice repeatedly injected with high ethanol doses (4g/kg) during adolescence. Furthermore, the increased expression of ethanol stimulant effects in these mice was maintained even after a second procedure of ethanol sensitization. Conclusions. Adolescence is a critical period for the development of a sensitization to ethanol stimulant properties providing that high intermittent ethanol doses are administered. These results might contribute to explain the relationship between age at first alcohol use and risks of later alcohol problems and highlight the dangers of repeated consumption of high alcohol amounts in young adolescents. [less ▲]

Detailed reference viewed: 18 (6 ULg)
Full Text
Peer Reviewed
See detailYBa2Cu3O7-δ thick films for magnetic shielding: Electrophoretic deposition from butanol-based suspension
Closset, Raphaël ULg; Kumar, Devendra; Wera, Laurent ULg et al

in Materials Letters (2014), 119

Multilayered YBa2Cu3O7-δ (YBCO) thick films were coated on silver substrates by electrophoretic deposition (EPD) followed by heat treatment. A butanol-based YBCO suspension is used instead of the common ... [more ▼]

Multilayered YBa2Cu3O7-δ (YBCO) thick films were coated on silver substrates by electrophoretic deposition (EPD) followed by heat treatment. A butanol-based YBCO suspension is used instead of the common acetone-iodine combination. Tests with several dispersing agents reveal that a branched polyethyleneimine (PEI) dispersant develops large positive surface charge on suspended YBCO particles. As a demonstration of the performance of this new suspension formulation, a 12-layer 100 μm-thick YBCO coating was deposited on an Ag tube. The superconducting transition is sharp with onset critical temperature at 92 K. The sample can shield a magnetic field of ~1.3 mT at 77 K, i.e., the best value so far for an YBCO coating on a metallic substrate. © 2013 Elsevier B.V. [less ▲]

Detailed reference viewed: 18 (3 ULg)
Full Text
Peer Reviewed
See detailInflorescence development in tomato: gene functions within a zigzag model.
Périlleux, Claire ULg; Lobet, Guillaume ULg; Tocquin, Pierre ULg

in Frontiers in Plant Science (2014), 5

Tomato is a major crop plant and several mutants have been selected for breeding but also for isolating important genes that regulate flowering and sympodial growth. Besides, current research in ... [more ▼]

Tomato is a major crop plant and several mutants have been selected for breeding but also for isolating important genes that regulate flowering and sympodial growth. Besides, current research in developmental biology aims at revealing mechanisms that account for diversity in inflorescence architectures. We therefore found timely to review the current knowledge of the genetic control of flowering in tomato and to integrate the emerging network into modeling attempts. We developped a kinetic model of the tomato inflorescence development where each meristem was represented by its ‘vegetativeness’ (V), reflecting its maturation state towards flower initiation. The model followed simple rules: maturation proceeded continuously at the same rate in every meristem (dV); floral transition and floral commitment occurred at threshold levels of V; lateral meristems were initiated with a gain of V (ΔV) relative to the V level of the meristem from which they derived. This last rule created a link between successive meristems and gave to the model its zigzag shape. We next exploited the model to explore the diversity of morphotypes that could be generated by varying dV and ΔV and matched them with existing mutant phenotypes. This approach, focused on the development of the primary inflorescence, allowed us to elaborate on the genetic regulation of the kinetic model of inflorescence development. We propose that the lateral inflorescence meristem fate in tomato is closer to an immature flower meristem than to the inflorescence meristem of Arabidopsis. In the last part of our paper, we extend our thought to spatial regulators that should be integrated in a next step for unraveling the relationships between the different meristems that participate to sympodial growth. [less ▲]

Detailed reference viewed: 36 (10 ULg)
Full Text
Peer Reviewed
See detailControllable morphology of flux avalanches in microstructured superconductors
Motta, M.; Colauto, F.; Vestgarden, J.I. et al

in Physical Review. B : Condensed Matter (2014)

The morphology of abrupt bursts of magnetic flux into superconducting films with engineered periodic pinning centers (antidots) has been investigated. Guided flux avalanches of thermomagnetic origin ... [more ▼]

The morphology of abrupt bursts of magnetic flux into superconducting films with engineered periodic pinning centers (antidots) has been investigated. Guided flux avalanches of thermomagnetic origin develop a tree-like structure, with the main trunk perpendicular to the borders of the sample, while secondary branches follow well-defi ned directions determined by the geometrical details of the underlying periodic pinning landscape. Strikingly, we demonstrate that in a superconductor with relatively weak random pinning, the morphology of such flux avalanches can be fully controlled by proper combinations of lattice symmetry and antidot geometry. Moreover, the resulting flux patterns can be reproduced, to the fi nest details, by simulations based on a phenomenological thermomagnetic model. In turn, this model can be used to predict such complex structures and to estimate physical variables of more di fficult experimental access, such as the local values of temperature and electric fi eld. [less ▲]

Detailed reference viewed: 16 (0 ULg)
Peer Reviewed
See detailEosinophilic pulmonary diseases
Clercx, Cécile ULg; Peeters, Dominique ULg

in Bonagura, John; Twedt, David (Eds.) Kirk's Current Veterinary Therapy (2014)

Detailed reference viewed: 14 (0 ULg)