Population history and gene dispersal inferred from spatial genetic structure of a Central African timber tree, Distemonanthus benthamianus (Caesalpinioideae)
; Doucet, Jean-Louis ;
in Heredity (2011), 106
African rainforests have undergone major distribution range shifts during the Quaternary, but few studies have investigated their impact on the genetic diversity of plant species and we lack knowledge on ... [more ▼]
African rainforests have undergone major distribution range shifts during the Quaternary, but few studies have investigated their impact on the genetic diversity of plant species and we lack knowledge on the extent of gene flow to predict how plant species can cope with such environmental changes. Analysis of the spatial genetic structure (SGS) of a species is an effective method to determine major directions of the demographic history of its populations and to estimate the extent of gene dispersal. This study characterises the SGS of an African tropical timber tree species, Distemonanthus benthamianus, at various spatial scales in Cameroon and Gabon. Displaying a large continuous distribution in the Lower Guinea domain, this is a model species to detect signs of past population fragmentation and recolonization, and to estimate the extent of gene dispersal. Ten microsatellite loci were used to genotype 295 adult trees sampled from eight populations. Three clearly differentiated gene pools were resolved at this regional scale and could be linked to the biogeographical history of the region, rather than to physical barriers to gene flow. A comparison with the distribution of gene pools observed for two other tree species living in the same region invalidates the basic assumption that all species share the same Quaternary refuges and recolonization pathways. In four populations, significant and similar patterns of SGS were detected. Indirect estimates of gene dispersal distances (sigma) obtained for three populations ranged from 400 to 1200m, whereas neighbourhood size estimates ranged from 50 to 110. [less ▲]Detailed reference viewed: 47 (18 ULg)
Maîtrise de la situation d’enseignement-apprentissage et savoirs professionnels des futurs enseignants
in Maubant, Philippe; Martineau, Stéphane (Eds.) Fondements des pratiques professionnelles des enseignants (2011)Detailed reference viewed: 31 (7 ULg)
Mitotic spindle: focus on the function of huntingtin
Godin, Juliette ;
in International Journal of Biochemistry & Cell Biology (2011), 43(6), 852-856Detailed reference viewed: 23 (3 ULg)
Retrieving semantic information from persons’ names.
Poster (2011)Detailed reference viewed: 18 (6 ULg)
L'Histoire d'Hercule : étude approfondie d'une suite de tapisseries de la seconde moitié du XVIe siècle appartenant aux Musées royaux d'Art et d'Histoire de Bruxelles
Master's dissertation (2011)Detailed reference viewed: 50 (7 ULg)
Forming forces in single point incremental forming: prediction by finite element simulations, validation and sensitivity
; Bouffioux, Chantal ; et al
in Computational Mechanics (2011), 47
The aim of this article is to study the accuracy of finite element simulations in predicting the tool force occurring during the single point incremental forming (SPIF) process. The forming of two cones ... [more ▼]
The aim of this article is to study the accuracy of finite element simulations in predicting the tool force occurring during the single point incremental forming (SPIF) process. The forming of two cones in soft aluminum was studied with two finite element (FE) codes and several constitutive laws (an elastic–plastic law coupled with various hardening models). The parameters of these laws were identified using several combinations of a tensile test, shear tests, and an inverse modeling approach taking into account a test similar to the incremental forming process. Comparisons between measured and predicted force values are performed. This article shows that three factors have an influence on force prediction: the type of finite element, the constitutive law and the identification procedure for the material parameters. In addition, it confirms that a detailed description of the behavior occurring across the thickness of the metal sheet is crucial for an accurate force prediction by FE simulations, even though a simple analytical formula could provide an otherwise acceptable answer. [less ▲]Detailed reference viewed: 112 (32 ULg)
Compte rendu de Hubertus NEUHAUSEN, "Der Zweite Alkibiades. Untersuchungen zu einen pseudoplatonischen Dialog"
in Antiquité Classique : Revue Interuniversitaire d'Etudes Classiques (2011), 80Detailed reference viewed: 6 (0 ULg)
Flow cytometric detection of myeloperoxidase in horse neutrophils: a novel technique in equine diagnostic research.
; Franck, Thierry ; et al
in Veterinary Immunology and Immunopathology (2011), 144(3-4), 417-22
Myeloperoxidase (MPO) is a protein of interest due to its involvement in equine pathologies. Until now, results in equine diagnostic research were achieved through extracellular MPO detection. However ... [more ▼]
Myeloperoxidase (MPO) is a protein of interest due to its involvement in equine pathologies. Until now, results in equine diagnostic research were achieved through extracellular MPO detection. However, studying the cellular MPO content in neutrophils has revealed important insights in human diseases. This study aimed to develop a technique for the specific detection of MPO on the single cell level defining a flow cytometric protocol for the detection of both equine surface-bound and cellular MPO. Both indirect and direct labeling techniques are described which include the comparison of two secondary antibodies and two linking-fluorochromes, respectively. [less ▲]Detailed reference viewed: 15 (4 ULg)
Intérêt d'une augmentation de dose des analogues de la somatostatine dans l'acromégalie
; Beckers, Albert
in Andrologic (2011), 7(4),Detailed reference viewed: 15 (3 ULg)
Muscular forces affecting the outcome of CCL surgery.
; Böhme, Béatrice ; Vroomen, Carl et al
in Proceedings of the 20th ECVS Congress (2011)Detailed reference viewed: 13 (0 ULg)
N/F 10. Themanummer "Pro of contra(stief)? Implicaties van de contrastieve aanpak voor het NVT-onderwijs"
Book published by Van In (2011)Detailed reference viewed: 50 (3 ULg)
Screening for colorectal cancer in asymptomatic average risk patients: role of imaging.
; ; et al
in Acta Gastro-Enterologica Belgica (2011), 74(1), 70-6
Early detection of colorectal cancer or advanced adenomas is a public health priority in many industrialized countries. There are various methods of screening average risk individuals for colorectal ... [more ▼]
Early detection of colorectal cancer or advanced adenomas is a public health priority in many industrialized countries. There are various methods of screening average risk individuals for colorectal cancer, and their effectiveness may depend on subjective parameters like local expertise and patient's preferences. This paper reviews these tests with special emphasis regarding imaging techniques that aim to provide less-invasive alternatives to optical colonoscopy (OC) which is the standard of reference. Both Double-Contrast Barium Enema (DCBE) and Virtual Colonoscopy (VC) have >90% sensitivity compared to OC in the detection of clinically relevant colonic lesions. Nevertheless, VC may have an edge over DCBE for technical and reproductivity reasons, as well as greater learning opportunities. Imaging techniques criticisms regarding diminutive and flat lesions, cost, radiation exposure and effects on gastroenterological practice are addressed. [less ▲]Detailed reference viewed: 14 (3 ULg)
The extension of the INCL model for simulation of shielding in space
Pedoux, Sophie ; Cugnon, Joseph ; Mancusi, Davide et al
in Advances in Space Research (2011), 48(2), 383-389
Radiation hazard for space missions is mainly due to cosmic ray protons, helium nuclei and light ions, whose energy spectrum is maximum around 1 GeV per nucleon but remains non-negligible for energies up ... [more ▼]
Radiation hazard for space missions is mainly due to cosmic ray protons, helium nuclei and light ions, whose energy spectrum is maximum around 1 GeV per nucleon but remains non-negligible for energies up to 15 GeV per nucleon. Nuclear reactions induced by high energy protons are often described by intranuclear cascade plus evaporation models. The attention is focused here on the Liège Intranuclear Cascade model (INCL), which has been shown to reproduce fairly well a great deal of experimental data for nucleon-induced reactions in the 200 MeV to 2 GeV range, when coupled with the ABLA evaporation-fission code. In order to extend the model to other conditions relevant for space radiation, three improvements of INCL are under development. They are reported on here. First, the reaction model has been extended to nucleon-nucleus reactions at incident energies up to 15 GeV, mainly by the inclusion of additional pion production channels in nucleon-nucleon collisions during the cascade. Second, a coalescence mechanism for the emission of light charged particles has been implemented recently. Finally, the model has been modified in order to accommodate light ions as projectiles. First results are shown and compared with illustrative experimental data. Implications for issues concerning radiation protection in space are discussed. [less ▲]Detailed reference viewed: 12 (2 ULg)
L'image du mois. Le comble du coiffeur: avoir un poil dans la main.
CAUCANAS, Marie ; FRANCHIMONT, Claudine ; PIERARD, Gérald
in Revue Médicale de Liège (2011), 66(4), 177-8Detailed reference viewed: 27 (5 ULg)
Determinants of high, median and low rates of caesarean deliveries in Belgium
Absil, Gaëtan ; ; et al
Report (2011)Detailed reference viewed: 74 (22 ULg)
Present day carbon dioxide fluxes in the coastal ocean and possible feedbacks under global change
in da Silva Duarte, P. M.; Santana Casiano, J. M. (Eds.) Oceans and the atmospheric carbon content (2011)Detailed reference viewed: 26 (4 ULg)
De invloed van een muzikale opleiding op de perceptie van de prosodie van een vreemde taal: een verkennend onderzoek
; Rasier, Laurent ;
in Rasier, Laurent; Van Heuven, Vincent; Defrancq, Bart (Eds.) et al Nederlands in het perspectief van uitspraakverwerving en contrastieve taalkunde (2011)Detailed reference viewed: 41 (2 ULg)