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See detailDivergences et convergences des politiques d'intégration dans la Belgique multinationale. Le cas de parcours d'intégration pour les immigrés
Martiniello, Marco ULg; Ilke, Adam

in Revue Européenne des Migrations Internationales (2013), 29(2), 77-93

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See detailDivergences institutionelles et convergences mimétiques
Renard, Hugues ULg; Petit Jean, Maxime

Conference (2012, July)

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See detailDivergences morphologiques et génétiques chez une espèce de demoiselle (Pomacentridae): Pomacentrus coelestis
Frederich, Bruno ULg; Liu, Shang-Yin

Conference (2012, March 30)

La différentiation des populations est l’un des principaux thèmes de la biologie de l’évolution. Mise à part l’étude des variations des patrons de coloration, très peu d’études concernent les divergences ... [more ▼]

La différentiation des populations est l’un des principaux thèmes de la biologie de l’évolution. Mise à part l’étude des variations des patrons de coloration, très peu d’études concernent les divergences morphologiques entre les populations de poissons des récifs coralliens. Dans ce travail, nous avons étudié la différentiation morphologique et génétique entre plusieurs populations de l’espèce de demoiselle, Pomacentrus coelestis Jordan & Starks, 1901, dans le Nord-Ouest de l’océan Pacifique. Cette espèce, inféodée aux récifs coralliens, se nourrit principalement de zooplancton. Elle est particulièrement abondante dans cette région du monde. Les formes des mâchoires buccales (c’est-à-dire la mandibule et le prémaxillaire) ont été étudiées au moyen des méthodes de morphométrie géométrique et la structure génétique des populations a été caractérisée au moyen de cinq microsattelites (POM3, POM2, AC1578, Pom2269 et Pom2416). Différents tests statistiques ont révélé une variation significative de forme entre les populations de P. coelestis pour chacune des deux pièces squelettiques. Les variations de forme de la mandibule et du prémaxillaire apparaissent non-corrélées. Les variations morphologiques de la mandibule accompagne une rupture génétique entre des populations de l’île principale du Japon et les îles d’Okinawa et Taiwan. Cependant, les tests de Mantel et Procrustes n’ont révélé aucune congruence entre les structures génétiques et morphologiques. Des variables géographiques telles que la latitude, la longitude et les distances kilométriques expliquent peu ou pas les variances morphologiques observées. Dans notre discussion, nous illustrons que la plasticité phénotypique serait un mécanisme évolutif potentiel sous-jacent à la différence de formes entre les populations de P. coelestis. Cependant l’hypothèse d’une divergence adaptative ne pourrait cependant pas être exclue vu que nous avons uniquement étudié des marqueurs génétiques neutres (microsattelites). Une approche écomorphologique suggère que des régimes alimentaires différents pourraient être liés aux variations de forme des mâchoires buccales. A titre d’exemple, les individus des populations de l’île principale du Japon ont des mandibules plus massives suggérant des activités de broutage et/ou de morsure plus fréquentes. Inversément, les individus de Taiwan et d’Okinawa arborent un processus ascendant du prémaxillaire proportionellement plus long que les poissons des autres populations. Cette caractéristique, directement liée à l’efficacité de protrusion des mâchoires supérieures, confirmerait un degré de zooplanctonophagie plus élevé chez ces deux populations. [less ▲]

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See detailDiverse assemblages of Mid Devonian megaspores from Libya
Steemans, Philippe ULg; Breuer, Pierre; Petus, Elodie ULg et al

in Review of Palaeobotany and Palynology (2011), 165

[en] A restudy of Devonian palynological assemblages of samples from the A1-69 borehole, drilled in the Ghadamis Basin, western Libya, North Africa has led to the discovery of numerous well-preserved ... [more ▼]

[en] A restudy of Devonian palynological assemblages of samples from the A1-69 borehole, drilled in the Ghadamis Basin, western Libya, North Africa has led to the discovery of numerous well-preserved megaspores amongst abundant miospores, rare acritarchs and rare chitinozoans. Thirteen samples from base to top, 1496 ft (456 m) up to 965 ft (294 m), contain the richest Devonian megaspore assemblages from northwestern Gondwana. The section is dated by a rich diverse miospore assemblage indicating the presence of the upper part of the AD pre-Lem Biozone up to the lower part of the TCo Oppel Zone, ranging from a latest Eifelian or earliest Givetian age up to a latest Givetian or an earliest Frasnian age. Seventeen megaspore taxa have been identified. Among them, two new species (Biharisporites lugardonii and Lagenicula milleri) and four new varieties (Corystisporites acutispinosus var. acutispinosus and var. bullatus, Heliotriletes longispinosus var. longispinosus and var. radiatus) are described. One new possible megaspore species is also described: Verruciretusispora labiosa sp. nov. One core sample (1293 ft, 394 m) contains several specimens of very large megaspores (ca. 1 mm), the largest known from Devonian localities (except for one specimen observed in the Givetian from Belgium). Among the 17 megaspore taxa from Libya, 6 are present on the Euramerican Continent. This observation is in accordance with previous palynological conclusions that favour the absence of palaeogeographic barriers between the Euramerican and Gondwanan continents that are suggested to be grouped together in a “Pre-Pangea” land mass. [less ▲]

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See detailDiverse phenotypic profile of uterine tumors resembling ovarian sex cord tumors: an immunohistochemical study of 12 cases.
de Leval, Laurence ULg; Lim, Gkeok Stzuan Diana; Waltregny, David ULg et al

in American Journal of Surgical Pathology (2010), 34(12), 1749-61

BACKGROUND: Uterine tumors resembling ovarian sex cord tumors (UTROSCTs) are rare neoplasms thought to be of putative endometrial stromal origin and solely composed of sex cord elements. Our study aimed ... [more ▼]

BACKGROUND: Uterine tumors resembling ovarian sex cord tumors (UTROSCTs) are rare neoplasms thought to be of putative endometrial stromal origin and solely composed of sex cord elements. Our study aimed to delineate the immunophenotype of these tumors and to verify whether their morphology reflects true sex cord-like differentiation. DESIGN: Representative paraffin blocks from 12 UTROSCTs were selected after confirmation of the diagnosis. Cords and/or trabeculae were seen in all tumors, whereas tubules, diffuse areas, and a retiform pattern were present in 9, 6, and 2 cases, respectively. Tumors were stained for sex cord (inhibin, calretinin, WT1, and melan-A), epithelial (KL1 and epithelial membrane antigen), and smooth muscle markers (smooth muscle actin, desmin, smooth muscle myosin heavy chain, h-caldesmon, and histone deacetylase-8), CD10, HMB45, S100, and CD117. Intensity and percentage of staining were recorded. RESULTS: Six out of 12 tumors were positive for sex cord markers (inhibin 3 of 12, calretinin 4 of 12, WT1 4 of 12, and melan-A 3 of 11) with 4 tumors coexpressing more than one marker. Half of the UTROSCTs showed positivity for KL1, with 2 tumors coexpressing epithelial membrane antigen. All but one tumor expressed one or more smooth muscle markers, with smooth muscle actin, desmin and histone deacetylase-8 being most commonly expressed. CD10 was positive in 6 of 12 tumors, CD117 in 4 of 12, and S100 in 2 of 11 tumors, whereas HMB45 was negative in 11 tumors tested. CONCLUSIONS: UTROSCTs have a diverse immunohistochemical profile often coexpressing sex cord, epithelial, and smooth muscle markers. The expression of smooth muscle markers in these tumors does not imply a smooth muscle origin as endometrial and sex cord stromal tumors are not infrequently positive for these markers. Positivity for sex cord markers supports a true sex cord/steroid phenotype. Although the immunohistochemical profile of these tumors overlaps with that of endometrial stromal tumors with sex cord-like differentiation as well as ovarian sex cord stromal tumors, the origin of UTROSCT remains uncertain. [less ▲]

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See detailDiverses méthodes de philosophie avec les enfants
Herla, Anne ULg

Conference given outside the academic context (2007)

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See detailDiversidad genética del Virus de la Leucemia Bovina: una aproximación filogenética
Rodriguez, Sabrina ULg; Trono, K.; Jones, L.R.

Poster (2008, September 22)

Diversidad genética del Virus de la Leucemia Bovina: una aproximación filogenética Sabrina M. Rodríguez1, Karina Trono1, Leandro R. Jones2 1 Instituto de Virología, CICVyA, INTA-Castelar. C.C. 77. C.P ... [more ▼]

Diversidad genética del Virus de la Leucemia Bovina: una aproximación filogenética Sabrina M. Rodríguez1, Karina Trono1, Leandro R. Jones2 1 Instituto de Virología, CICVyA, INTA-Castelar. C.C. 77. C.P. 1712. Castelar, Buenos Aires, Argentina. 2 Estación de Fotobiología Playa Unión. C.C. 15. C.P. 9103. Rawson, Chubut, Argentina. *E-mail: srodriguez@cnia.inta.gov.ar El virus de la leucemia bovina (BLV), agente etiológico de la Leucemia Bovina Enzoótica (LBE), pertenece al género Deltaretrovirus, dentro de la familia Retroviridae. En Argentina, la infección por BLV presenta niveles de seroprevalencia individual del 32,8% y del 84% a nivel predial. En trabajos anteriores, las cepas de BLV han sido clasificadas en dos grupos: uno Europeo y otro que incluye cepas de Japón y Estados Unidos (USA). En dos trabajos mas recientes se observo que la mayoría de las cepas argentinas se agrupan en un clado, mientras que una proporción minoritaria se agrupa con cepas de diverso origen. En uno de estos trabajos se propuso la existencia de cuatro genogrupos (Clusters I a IV), uno de los cuales (Cluster II) seria exclusivo de Argentina. Estas clasificaciones fueron propuestas en base a análisis realizados a partir de matrices de distancias obtenidas a partir de secuencias parciales (444/1547 pb.) del gen env. Las distancias fueron calculadas asumiendo el modelo evolutivo de Kimura con dos parámetros (K2P) y los árboles se obtuvieron mediante el algoritmo Neighbor-Joining (NJ). Actualmente, existen métodos específicos y objetivos para la selección de modelos evolutivos. Se ha demostrado que el uso de modelos arbitrarios puede conducir a resultados inesperados y erróneos. Por otro lado, el algoritmo NJ ha sido ampliamente superado por métodos más exhaustivos y modernos cómo Parsimonia y Máxima Verosimilitud. En este trabajo se caracterizaron 28 provirus argentinos mediante la secuenciación del gen env (1333/1547 pb.). Estas secuencias, junto con otras 42 secuencias seleccionadas de forma tal de abarcar toda la diversidad conocida y de incluir representantes de la mayor cantidad posible de locaciones geográficas, fueron analizadas mediante Parsimonia con el objeto de examinar las clasificaciones previas. Como outgroup (OG), se utilizaron secuencias homólogas de HTLV-1, HTLV-2, STLV-1 y STLV-2. Las secuencias fueron alineadas usando el programa Muscle 3.6. Los alineamientos fueron analizados con el programa TNT 1.1, mediante el cual se realizaron 1000 adiciones al azar (RAS) seguidas de Tree Bisection Reconection (TBR). La estimación del soporte de los grupos identificados se realizó mediante Symetric Jackniffing, utilizando el programa TNT. Nuestros resultados soportan la existencia del clado de secuencias de Japón y USA. Los árboles obtenidos en este trabajo no apoyan ni contradicen el grupo europeo, ya que el mismo podría estar presente en algunas de las posibles resoluciones del árbol sin raíz. Las secuencias de Argentina no se ubicaron en un único grupo sino que se mezclaron con cepas de diverso origen. Nuestros resultados no soportaron la hipótesis de que exista regionalización de las cepas de BLV, tal como se ha observado en HTLV. El árbol consenso de los árboles derivados del análisis incluyendo el outgroup, presentó una resolución relativamente baja con respecto al árbol consenso derivado del análisis sin raíz. Esto parece deberse a que las secuencias utilizadas como outgroup son extremadamente divergentes con respecto al ingroup, lo cual queda en evidencia luego de una simple inspección visual del correspondiente alineamiento. El resultado de esto es que muchas regiones de la matriz constituyen alineamientos al azar (es decir asignaciones de homología primaria incorrectas y aleatorias), con la consecuente pérdida de información. Esta última observación es de particular interés dado que HTLV y STLV han sido utilizados como OG en una gran cantidad de trabajos, lo cual está justificado ya que son los grupos conocidos más próximos a BLV. Nuestros análisis, sin embargo, sugieren fuertemente que es necesario identificar outgroups más adecuados para lograr una comprensión más acabada de la diversidad de estos virus. [less ▲]

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See detailDiversidad genética molecular de Mirabilis expansa mediante RAPD
Chia, J. W.; Lopez, C. B.; Blas, R. et al

in Ecologia Aplicada (2006), 5(1,2), 81-86

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See detailDe diversificatie van de Belgische verscheidenheid
Martiniello, Marco ULg

in Martiniello, Marco; Swyngedouw, Marc (Eds.) Belgische Toestanden. De lotgevallen van een kleine bi-culturele democratie (1998)

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See detailDiversification among damselfishes (Pomacentridae): a comparison of ontogenetic trajectories
Frederich, Bruno ULg; Vandewalle, Pierre ULg

Poster (2006, August)

The Pomacentridae family, or damselfishes, includes more than 330 species living mainly in a coral reef environment. They have a complex life cycle involving a pelagic dispersion period of larvae and a ... [more ▼]

The Pomacentridae family, or damselfishes, includes more than 330 species living mainly in a coral reef environment. They have a complex life cycle involving a pelagic dispersion period of larvae and a juvenile and adult benthic life period associated to reef. The colonisation is associated with a metamorphosis allowing the fish to adapt to their new environment. Our study focused on morphological modifications, as skeletal shape changes, occurring during the development from settling larvae to juvenile and leading to diversification of adult species. To test allometry and to examine diversification in shapes, geometric morphometrics were used. This method, which allows description and statistical analysis of form, is applied to define ontogenetic shape changes and to compare allometries responsible for species diversification. It is applied here for skull structures involved in food capture as neurocranium, suspensorium, opercle, premaxillary bone and mandible. Six species were studied: Chromis viridis, Dascyllus aruanus, Dascyllus carneus, Pomacentrus pavo, Chrysiptera glauca and Stegastes nigricans. At the end of larval stage, structures in fishes are rather similar. None of the species has an isometric growth. Ontogenetic allometries concern each skeletal unit. The two species of Dascyllus are the lone to have a common ontogenetic transformation, and it appears that allometries giving the shapes’diversification correspond to ecological adaptations of each species. From a functional point of view, the general trend in skeletal shape changes corresponds to an optimisation of the suction feeding apparatus (for example: development in height and length of the suspensorium and opercle, shortening of the mandible). [less ▲]

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See detailDiversification and epidemic risks of poultry production systems in Hanoi suburb
Phan Dang, Thang; Duquesne, Brigitte ULg; Lebailly, Philippe ULg et al

in J. Sci. Dev. (2010), 8((Engl.Iss.2)), 203-215

This research aims to address this question and to improve the income of small poultry producers through identification of poultry production systems and the supply chains with their various constraints ... [more ▼]

This research aims to address this question and to improve the income of small poultry producers through identification of poultry production systems and the supply chains with their various constraints, including the diseases and to analyze the explicative factors of the poultry development at local level. The research was conducted by interviewing and production record keeping system at the household farms which have poultry production at different scales in Hanoi suburb from December 2008 to November 2009. There are four poultry production systems (1) integrated poultry production system with a good bio-safety level; (2) layer/reproductive poultry production system at the semi-commercial scale with minimal to moderate bio-safety level; (3) broiler production system at the semi-commercial scale with the low to minimal bio-safety level and; (4) backyard poultry production system with low bio-safety level. Only the chicken flocks in the system 1 and the layer/reproductive hens in the system 2 are regularly vaccinated. This research showed that farmers’ know-how is still limited, negatively affecting income and economic efficacy of the systems. In order to have sustainable development in the next years to come, it is necessary to equip farmers with good scientific knowledge or to support them to build improved poultry production systems such as a practical system for disease prevention and food safety, the HACCP. [less ▲]

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See detailDiversification and epidemic risks of poultry production systems in Hanoi suburban
Phan Dang, Thang ULg; Duquesne, Brigitte; Lebailly, Philippe ULg et al

in Hanoi University of Agriculture; Francophone Joint University Council (CIUF) (Eds.) Proceedings of Scientific Research Results - Institutional University Cooperation Program 2008-2012 (2013)

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See detailDiversification artistique et politiques culturelles dans les villes multiculturelles
Martiniello, Marco ULg

in SociologieS [Online], Files, Diversification artistique et politiques culturelles (2014)

Cet article introductif part du constat que la mondialisation se traduit par une diversification culturelle des villes européennes. Cette diversité donne lieu à deux tendances contradictoires. D'une part ... [more ▼]

Cet article introductif part du constat que la mondialisation se traduit par une diversification culturelle des villes européennes. Cette diversité donne lieu à deux tendances contradictoires. D'une part, on observe une tendance à la polarisation et à la fragmentation ethniques dans de nombreuses villes. D'autre part, on observe des mouvements vers plus d'intégration résidentielle et la formation de quartiers multi-ethniques dans lesquels se développent la co-inclusion et les interactions entre les citoyens de différentes origines ethniques et sociales. Ces tendances contradictoires se marquent aussi dans le domaine artistique qui est assez peu étudié dans les débats sociologiques et politiques sur l’immigration, l’intégration et le multiculturalisme. Après avoir proposé un cadre pour cette étude ainsi que les enjeux principaux de la question artistique dans les villes post-migratoires, l’article présente brièvement les autres contributions qui composent ce dossier. [less ▲]

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See detailDiversification dans le secteur agricole
Burny, Philippe ULg

Conference given outside the academic context (1998)

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See detailLa diversification de la production forestière ligneuse : un maillon stratégique de la filière bois
Rondeux, Jacques ULg; Fraipont, L.; Mottet, A.

Scientific conference (1986, March 07)

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See detailLa diversification des cultures urbaines : Réflexions sur Naples et Liège
Martiniello, Marco ULg

Scientific conference (2014, November 13)

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See detailLa diversification en productions animales
Wavreille, José; Rondia, Pierre; Decruyenaere, Virginie et al

in CRA-W; FUSAGx (Eds.) 10ème Carrefour des Productions animales : L’élevage : hier, aujourd’hui, demain quelles attentes pour quels enjeux ? (2005, January 26)

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See detailDiversification et circuit court
Burny, Philippe ULg

in Burny, Philippe; Mathijs, E.; Mottoulle, A. (Eds.) et al Défis à l'économie rurale : Livre commémoratif du 20e anniversaire de l'Association Belge d'Economie Rurale (1999)

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See detailDiversification of agricultural productions in Belgium
Burny, Philippe ULg

Conference (1992)

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See detailThe diversification of early eukaryotes
Javaux, Emmanuelle ULg

Conference (2012, September)

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