References of "2008"
     in
Bookmark and Share    
Peer Reviewed
See detailHealthy and safe food for everybody
Jijakli, Haissam ULg

Conference (2008)

Detailed reference viewed: 7 (1 ULg)
Full Text
Peer Reviewed
See detailÉco-éthologie d’une population de vipères péliades (Vipera b. berus L.) dans une région de bocage du sud-ouest de la Belgique
Graitson, Eric ULg

in Bulletin de la Société Herpétologique de France (2008), 128

the preference of adders for different linear elements of the ‘bocage’, a farmland landscape crisscrossed by hedges, was studied during 2.5 years in south-West Belgium. Most individuals occurred in South ... [more ▼]

the preference of adders for different linear elements of the ‘bocage’, a farmland landscape crisscrossed by hedges, was studied during 2.5 years in south-West Belgium. Most individuals occurred in South-facing woody hedges between the autumn and the beginning of spring. During the mating period, by contrast, most individuals tended to shift of habitat and favoured 1 to 2 m wide grassy hedges with a limited shrub cover and a north-south orientation. Mating females especially favoured this latter habitat, probably because of their specific micro-climatic conditions, including a higher insulation. A few individuals, however, remained in the same habitat all year round. The identification of individuals, which was performed on the basis of features including body and head color patterns, but not on individual clipping, proved to be difficult owing to the high density of individuals. Linear elements in the form of grassy hedges, not very space-consuming, can shelter very high densities of snakes. in the context of a sharp decrease of the bocage landscape, the conservation of common European vipers relies on the maintenance of such linear landscape elements as grassy and shrubby hedges, which can be enhanced by the implementation of recent measures aiming at restoring extensive agricultural systems. [less ▲]

Detailed reference viewed: 184 (7 ULg)
Full Text
Peer Reviewed
See detailEncore un pas vers la standardisation internationale du dosage d'HbA1c
Gillery; Bordas-fonfrède; Chapelle, Jean-Paul ULg et al

in Annales de Biologie Clinique (2008), 66(1), 6-8

Detailed reference viewed: 41 (0 ULg)
See detailLa théorie du complot en politique
Jamin, Jérôme ULg

Scientific conference (2008)

Detailed reference viewed: 33 (2 ULg)
Full Text
Peer Reviewed
See detailWhat makes Episyrphus balteatus (Diptera: Syrphidae) oviposit on aphid infested tomato plants?
Verheggen, François ULg; Capella, Quentin ULg; Wathelet, Jean-Paul ULg et al

in Communications in Agricultural and Applied Biological Sciences (2008), 73(3), 371-81

Under attack by insect pests, many plant species change their volatile chemical emissions to attract natural enemies. Most of the tomato (Lycopersicon sp., Solanaceae) varieties are subjected to ... [more ▼]

Under attack by insect pests, many plant species change their volatile chemical emissions to attract natural enemies. Most of the tomato (Lycopersicon sp., Solanaceae) varieties are subjected to infestation by molluscs and insects, including the generalist aphid Myzus persicae Sulzer (Homoptera, Aphididae). Episyrphus balteatus De Geer (Diptera: Syrphidae) is a generalist aphid predator that was here observed to lay eggs on M. persicae infested tomato but not on non-infested plants. In order to identify the volatile chemicals that guide the foraging and oviposition behaviour of E. balteatus, we collected and identified volatiles released in the headspace of both aphid infested and uninfested tomato plants by SPME-GC-MS. The identified chemicals were subsequently tested by electroantennography (EAG) on E. balteatus. Monoterpenes and sesquiterpenes were identified, the main volatile chemicals being beta-phellandrene, 2-carene, alpha-phellandrene, 3-carene and o-pinene. Electrical depolarizations were observed for each tested monoterpene, with optimal responses ranging from -0.2 to -0.8 mV. Episyrphus balteatus antennae showed dose-response relationships towards all the active chemicals. (E)-beta-farnesene, the main component of the aphid alarm pheromone, was the only active sesquiterpene, and is presumed to act as an oviposition stimulus for E. balteotus. [less ▲]

Detailed reference viewed: 134 (15 ULg)
See detailLes professionnels du conseil : travail sur autrui et travail sur soi
Draelants, Hugues; Giraldo, Sylvia; Orianne, Jean-François ULg

in Dupriez, Vincent; Orianne, Jean-François; Verhoeven, Marie (Eds.) De l’école au marché du travail : l’égalité des chances en question (2008)

Detailed reference viewed: 58 (7 ULg)
See detailPolitiques publiques et autocontrainte
Orianne, Jean-François ULg; Draelants, Hugues; Donnay, Jean-Yves

in Dupriez, Vincent; Orianne, Jean-François; Verhoeven, Marie (Eds.) De l’école au marché du travail : l’égalité des chances en question (2008)

Detailed reference viewed: 59 (6 ULg)
Full Text
Peer Reviewed
See detailNumerical Modelling of Coupled Mechanics and Gas Transfer around Radioactive Waste in Long-Term Storage
Gerard, Pierre ULg; Charlier, Robert ULg; Barnichon, Jean-Dominique et al

in Journal of Theoretical and Applied Mechanics (2008), 38(1-2), 25-44

During long-term storage of radioactive waste, steel containers will be corroded. This process leads to hydrogen production. A boundary value problem has been proposed to study the numerical modelling of ... [more ▼]

During long-term storage of radioactive waste, steel containers will be corroded. This process leads to hydrogen production. A boundary value problem has been proposed to study the numerical modelling of the gas migration and its coupling with the mechanical strains and stresses, under isothermal conditions. Biphasic fluid transfer model (considering water, vapour, gaseous hydrogen and dissolved hydrogen) is defined. A 2D axisymmetric case with simplified geometry close to waste disposal in clay is modelled. Fluid transport problem is first resolved. Then, coupled mechanics and fluid transfers are modelled to determine the coupling effects. [less ▲]

Detailed reference viewed: 248 (28 ULg)
Full Text
See detailEnvironmental policies and legislation
Burny, Philippe ULg; Petrescu-Mag, Ruxandra Malina

Book published by Les Presses Agronomiques de Gembloux (2008)

Detailed reference viewed: 14 (3 ULg)
See detailLe soleil et sa cour
Jaminon, Martine ULg; Dumont Pascal

Learning material (2008)

14 panneaux traitant du système solaire

Detailed reference viewed: 7 (0 ULg)
See detailAryl Hydrocarbon Receptor interacting Protein Gene Mutations in Bulgarian FIPA and Young Sporadic Pituitary Adenoma Patients
Yaneva, M.; Daly, Adrian ULg; Tichomirowa, M. A. et al

in ENDO 2008: 90th Annual Meeting of the Endocrine Society - Abstract book (2008)

Detailed reference viewed: 27 (0 ULg)
See detailEffect of aggressive interactions on aromatase activity in discrete brain regions in wild male white-crowned sparrows
Charlier, Thierry ULg; Newman, Amy EM; Soma, Kiran K

Poster (2008)

Testosterone (T) is a critical endocrine factor involved in the activation of aggressive behaviors. In many vertebrate species, circulating T levels rapidly increase after aggressive encounters during the ... [more ▼]

Testosterone (T) is a critical endocrine factor involved in the activation of aggressive behaviors. In many vertebrate species, circulating T levels rapidly increase after aggressive encounters during the breeding season. In contrast, we recently showed that circulating T concentrations did not change in white-crowned sparrows in the late breeding season after simulated territorial intrusions. We suggested that changes in local metabolism of T might be more important than changes in systemic T levels. Neural aromatization of T into 17􀀁-estradiol (E2) often mediates the physiological and behavioral actions of T. In vertebrates, aromatase is expressed in several discrete brain regions. We hypothesized that in the late breeding season, brain aromatase is rapidly modulated after aggressive interaction, leading to changes in local concentrations of E2. Wild male white-crowned sparrows were exposed to simulated territorial intrusion with song playback and decoy (STI) or control (CON) for 30 min. STI significantly increased aggressive behaviors. Birds were then caught, rapidly bled and sacrificed. Brains were collected and rapidly frozen on dry ice. We used 0.9 mm diameter punches from 300 μm coronal sections to isolate 13 different brain nuclei. Aromatase activity was analyzed in punches from the left side of the brain, while E2 was analyzed in punches from the right side of the brain. Aromatase activity was quantified by measuring the release of tritiated water during aromatization of [1􀀁-3H]-androstenedione. As expected, aromatase activity was high in the medial preoptic area, ventromedial nucleus of the hypothalamus, hippocampus, bed nucleus of the stria terminalis, nucleus taeniae of the amygdala, and caudomedial nidopallium. Aromatase activity was low in the medial magnocellular nucleus of anterior nidopallium, HVC, Area X, nucleus robustus of the arcopallium, optic lobes, periaqueductal gray and cerebellum. Aromatase activity was not different between the STI and CON groups in any region. There were no significant correlations between aromatase activity and aggressive behaviors or endocrine measures (plasma T, progesterone, corticosterone and corticosteroid binding globulin). These data provide no evidence for rapid modulation of brain aromatase activity following aggressive interactions. It is however possible that aromatase activity is more rapidly modulated (e.g. within 5 min) and these changes were not observed in our 30 min paradigm. We are currently investigating whether local E2 is affected by aggressive interactions. [less ▲]

Detailed reference viewed: 23 (1 ULg)
Full Text
See detailLa sociologie de l'action publique
Levêque, Audrey ULg

in Jacquemain, Marc; Frère, Bruno (Eds.) Epistémologie de la sociologie. Paradigmes pour le XXIè siècle. (2008)

Introduction à la sociologie de l'action publique, cette contribution retrace les grandes lignes de la naissance, de la définition et des étapes de l'analyse des politiques publiques ainsi que son ... [more ▼]

Introduction à la sociologie de l'action publique, cette contribution retrace les grandes lignes de la naissance, de la définition et des étapes de l'analyse des politiques publiques ainsi que son évolution vers l'action publique. [less ▲]

Detailed reference viewed: 303 (19 ULg)
Full Text
Peer Reviewed
See detailComment diviser huit en trois parts égales ? De l'anecdote au récit à énigme dans la tradition arabe
Bauden, Frédéric ULg

in Bauden, Frédéric; Chraïbi, Aboubakr; Ghersetti, Antonella (Eds.) Le Répertoire narratif arabe médiéval: transmission et ouverture. Actes du colloque international (Université de Liège, 15-17 septembre 2005) (2008)

Detailed reference viewed: 42 (8 ULg)
Full Text
Peer Reviewed
See detailPreserver le fonctionnement du cerveau...par la pratique d'une activite physique?
Garraux, Gaëtan ULg

in Revue Médicale de Liège (2008), 63(5-6), 293-8

Over the last few years, there has been an increasing interest in the relationship between brain function and physical exercise. Preliminary evidence from observational and interventional studies in ... [more ▼]

Over the last few years, there has been an increasing interest in the relationship between brain function and physical exercise. Preliminary evidence from observational and interventional studies in humans suggests a positive and robust effect of chronic aerobic exercise on several brain functions across the entire lifespan. Physical activity and exercise might also serve to reduce the risk of age-associated neurological disorders such as Alzheimer's and Parkinson's diseases. The mechanisms underlying these beneficial effects remain poorly understood. More scientific work is needed before disseminating more specific recommendations to the general population. [less ▲]

Detailed reference viewed: 204 (19 ULg)
Full Text
See detailTests on iron materials
Ly, Dong Phuong Lam ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

Report (2008)

Detailed reference viewed: 25 (11 ULg)
Peer Reviewed
See detailAphid-ant mutualism: How do aphids focus ant foraging?
Verheggen, François ULg; Detrain, Claire; Diez, Lise et al

Conference (2008)

Detailed reference viewed: 12 (5 ULg)