References of "2009"
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See detailGeneration of total angular momentum eigenstates in remote qubits
Maser, A.; Schilling, U.; Bastin, Thierry ULg et al

in Physical Review. A (2009), 79

We propose a scheme enabling the universal coupling of angular momentum of N remote noninteracting qubits using linear optical tools only. Our system consists of N single-photon emitters in a ... [more ▼]

We propose a scheme enabling the universal coupling of angular momentum of N remote noninteracting qubits using linear optical tools only. Our system consists of N single-photon emitters in a configuration that are entangled among their long-lived ground-state qubits through suitably designed measurements of the emitted photons. In this manner, we present an experimentally feasible algorithm that is able to generate any of the 2N symmetric and nonsymmetric total angular momentum eigenstates spanning the Hilbert space of the N-qubit compound. [less ▲]

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See detailAfrican American and Caribbean Literatures in Belgium: So Close, Yet So Far Apart
Ledent, Bénédicte ULg

in Transatlantica: Revue d'études américaines / American studies journal (2009), 1

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See detailHyperforin and aristoforin inhibit lymphatic endothelial cell proliferation in vitro and suppress tumor-induced lymphangiogenesis in vivo
Rothley, M.; Schmid, A.; Thiele, W. et al

in International Journal of Cancer = Journal International du Cancer (2009), 125(1), 34-42

The phloroglucinol derivative hyperforin, a major bioactive constituent of St. John's wort, is increasingly recognized as being able to regulate a variety of pathobiological processes and, thus, to ... [more ▼]

The phloroglucinol derivative hyperforin, a major bioactive constituent of St. John's wort, is increasingly recognized as being able to regulate a variety of pathobiological processes and, thus, to possess potential therapeutic properties. In the context of cancer, hyperforin induces the apoptosis of cancer cells, inhibits angiogenesis and suppresses metastasis formation. Here, we report a new pharmacological function of hyperforin and its stabilized derivative aristoforin, namely the suppression of lymphatic endothelial cell (LEC) growth and lymphangiogenesis. At concentrations less than 10 M, we found that these compounds induce cell cycle arrest of LECs, and at higher concentrations induce apoptosis. The loss of mitochondrial membrane potential and the activation of caspase-9 during the induction of apoptosis indicate that the intrinsic pathway of apoptosis is stimulated by these compounds, similar to the situation in tumor cells. In thoracic duct ring outgrowth assays, hyperforin and aristoforin both inhibited lymphangiogenesis, as evidenced by the suppression of lymphatic capillary outgrowth. In an in vivo animal model, both compounds were able to inhibit tumor-induced lymphangiogenesis. Together these data substantiate a new role for hyperforin and its derivatives as suppressors of lymphangiogenesis, and support their further investigation as potential anticancer drugs that target tumor growth and metastasis at multiple levels. [less ▲]

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See detailGlucosinolates and their measurement
Wathelet, Jean-Paul ULg

Conference (2009)

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See detailTraitements actuels du lymphome folliculaire
Bonnet, Christophe ULg; Beguin, Yves ULg; De Prijck, Bernard ULg et al

in Revue Médicale Suisse (2009), 5

After diffuse large B-cell lymphoma, follicular lymphoma is the most frequent non-Hodgkin's lymphoma. It remains incurable, except for localized diseases. Advanced disease has to be treated only in the ... [more ▼]

After diffuse large B-cell lymphoma, follicular lymphoma is the most frequent non-Hodgkin's lymphoma. It remains incurable, except for localized diseases. Advanced disease has to be treated only in the presence of clinical and/or biology aggressiveness. These patients should be treated by rituximab (Mab-Thera) associated to polychemotherapy comprising cyclophosphamide, vincristine and prednisone. After this therapy, the benefit of rituximab in maintenance has to be confirmed. Autologous stem cell transplantation is also an interesting option. The other therapeutic options comprise radio-immunotherapy with 90Y ibritumomab tiuxetan (Zevalin) and bortezomib (Velcade). [less ▲]

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See detailChemical Composition and Antioxydant Activity of Laurus nobilis Floral Buds Essential Oil
Bouzouita, N.; El Omri, A.; Kachouri, F. et al

in Journal of Essential Oil Research (2009)

The essential oil of Laurus nobilis floral buds (FB) collected in Tunisia was obtained by hydrodistillation and analysed by GC-MS. Twenty three constituents were identified. The main components of this ... [more ▼]

The essential oil of Laurus nobilis floral buds (FB) collected in Tunisia was obtained by hydrodistillation and analysed by GC-MS. Twenty three constituents were identified. The main components of this oil were α-terpinyl acetate (28.43 %), methyl eugenol (19.57 %), eugenol (7.42 %) and elemicin (4.41 %). The antioxidant activity of the oil of Laurus nobilis FB was evaluated by two methods, β-carotene bleaching (BCB) test and 2.2-diphenyl-β-picrylhydrazyl (DPPH) assay using respectively butylated hydroxytoluene (BHT), trolox, gallic acid, caffeic acid and δ-tocopherol as standards. It was found that the Laurus nobilis FB oil have a significant antioxidant effect when tested by each method respectively. The antioxidant activity of this oil is more effective than the synthetic antioxidant (BHT) at 200 ppm and can be attributed to the active compounds eugenol, elemicin and methyl eugenol present in this essential oil. [less ▲]

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See detailPAI-1 Regulates the Invasive Phenotype in Human Cutaneous Squamous Cell Carcinoma
Freytag, J.; Wilkins-Port, C. E.; Higgins, C. E. et al

in Journal of Oncology Management : The Official Journal of the American College of Oncology Administrators (2009)

The emergence of highly aggressive subtypes of human cutaneous squamous cell carcinoma (SCC) often reflects increased autocrine/paracrine TGF-β synthesis and epidermal growth factor receptor (EGFR ... [more ▼]

The emergence of highly aggressive subtypes of human cutaneous squamous cell carcinoma (SCC) often reflects increased autocrine/paracrine TGF-β synthesis and epidermal growth factor receptor (EGFR) amplification. Cooperative TGF-β/EGFR signaling promotes cell migration and induces expression of both proteases and protease inhibitors that regulate stromal remodeling resulting in the acquisition of an invasive phenotype. In one physiologically relevant model of human cutaneous SCC progression, TGF-β1+EGF stimulation increases the production of several matrix metalloproteinases (MMPs), among the most prominent of which is MMP-10—an MMP known to be elevated in SCC in situ. Activation of stromal plasminogen appears to be critical in triggering downstream MMP activity. Paradoxically, PAI-1, the major physiological inhibitor of plasmin generation, is also upregulated under these conditions and is an early event in progression of incipient epidermal SCC. One testable hypothesis proposes that TGF-β1+EGF-dependent MMP-10 elevation directs focalized matrix remodeling events that promote epithelial cell plasticity and tissue invasion. Increased PAI-1 expression serves to temporally and spatially modulate plasmin-initiated pericellular proteolysis, further facilitating epithelial invasive potential. Defining the complex signaling and transcriptional mechanisms that maintain this delicate balance is critical to developing targeted therapeutics for the treatment of human cutaneous malignancies. [less ▲]

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See detailIntegracion Numerica del Problema Viscoplastico
Andia Fages, Susana; Raichman, Silvia; Mirasso, Anibal et al

(2009)

En este trabajo se discute la integración numérica para el modelo viscoplástico de Perzyna, que conduce a una ecuación de consistencia viscoplástica no lineal, de acuerdo a un trabajo previo de Ponthot ... [more ▼]

En este trabajo se discute la integración numérica para el modelo viscoplástico de Perzyna, que conduce a una ecuación de consistencia viscoplástica no lineal, de acuerdo a un trabajo previo de Ponthot. Esta ecuación no lineal se resuelve mediante elMétodo de Newton Raphson y el algoritmo resultante se implementa en MATLAB. Los resultados obtenidos con el programa desarrollado ajustan muy bien con soluciones cerradas disponibles en la literatura para algunos casos particulares. En este trabajo además se propone una solución cerrada para el caso de sensitividad viscosa lineal (m=1) y exponente de endurecimiento viscoplástico lineal (n=1). Se estudia además la respuesta del algoritmo frente a la variación de diferentes parámetros como el coeficiente de viscosidad. El código obtenido en una etapa posterior del estudio se podrá utilizar para resolver otros problemas de interés y, además, permitirá su implmentación en un código de elementos finitos con capacidades no lineales. [less ▲]

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See detailGestion des risques lors du transfert de méthodes analytiques
Rozet, Eric ULg; Dewe, W.; Hubert, Philippe ULg

Scientific conference (2009)

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See detailRole of A Disintegrin and Metalloprotease-12 in Neutrophil Recruitment Induced by Airway Epithelium.
Rocks, Natacha ULg; Estrella, C; Paulissen, Geneviève ULg et al

in American Journal of Respiratory Cell and Molecular Biology (2009), 41(4), 449-58

Among proteases, metalloproteases are implicated in tissue remodeling, as shown in numerous diseases including allergy. ADAMs (A Disintegrin And Metalloprotease) metalloproteases are implicated in ... [more ▼]

Among proteases, metalloproteases are implicated in tissue remodeling, as shown in numerous diseases including allergy. ADAMs (A Disintegrin And Metalloprotease) metalloproteases are implicated in physiologic processes such as cytokine and growth factor shedding, cell migration, adhesion, or repulsion. Our aim was to measure ADAM-12 expression in airway epithelium and to define its role during the allergic response. To raise this question, we analyzed the ADAM-12 expression ex vivo after allergen exposure in patients with allergic rhinitis and in vitro in cultured primary human airway epithelial cells (AEC). Clones of BEAS-2B cells transfected with the full-length form of ADAM-12 were generated to study the consequences of ADAM-12 up-regulation on AEC function. After allergen challenge, a strong increase of ADAM-12 expression was observed in airway epithelium from patients with allergic rhinitis but not from control subjects. In contrast with the other HB-epidermal growth factor sheddases, ADAM-10 and -17, TNF-alpha in vitro increased the expression of ADAM-12 by AEC, an effect amplified by IL-4 and IL-13. Up-regulation of ADAM-12 in AEC increased the expression of alpha3 and alpha4 integrins and to the modulation of cell migration on fibronectin but not on collagen. Moreover, overexpression of ADAM-12 in BEAS-2B enhanced the secretion of CXCL1 and CXCL8 and their capacity to recruit neutrophils. CD47 was strongly decreased by ADAM-12 overexpression, a process associated with a reduced adhesion of neutrophils. These effects were mainly dependent on epidermal growth factor receptor activation. In summary, ADAM-12 is produced during allergic reaction by AEC and might increase neutrophil recruitment within airway mucosa. [less ▲]

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See detailCaractérisation paysanne de Hippopotamus amphibius Linné 1758, dans la Réserve de Biosphère de la Mare aux Hippopotames, en zone sud soudanienne du Burkina Faso
Dibloni, O. T.; Coulibaly, N. D.; Guenda, W. et al

in International Journal of Biological and Chemical Sciences (2009), 3(2), 386-397

L’étude de la caractérisation de l’hippopotame par les populations villageoises a visé à inventorier les savoirs endogènes sur l’espèce dans la Réserve de Biosphère de la Mare aux Hippopotames du Burkina ... [more ▼]

L’étude de la caractérisation de l’hippopotame par les populations villageoises a visé à inventorier les savoirs endogènes sur l’espèce dans la Réserve de Biosphère de la Mare aux Hippopotames du Burkina Faso. L’inventaire de ces savoirs a porté sur l’effectif des populations d’hippopotames, la différenciation sexuelle, le régime alimentaire, les valeurs socioéconomiques et culturelles ainsi que les dégâts dus à cette espèce. L’enquête a été conduite dans six villages de l’ethnie Bobo et a concerné un échantillon de 77 personnes. Les personnes enquêtées savent que les hippopotames sont présents dans la réserve et estiment leur effectif à environ 33 individus. A l’aide de critères morphologiques et éthologiques, les villageois opèrent une différenciation sexuelle chez ces animaux. Le régime alimentaire est connu et comprendrait selon eux une quarantaine d’espèces végétales. Outre les valeurs socioéconomiques, culturelles et touristiques que la présence des hippopotames procure, les populations savent aussi que ces animaux participent au maintien de la biodiversité et à la fertilisation de la mare pour la production de poissons. Toutefois, l’espèce serait également à l’origine de la destruction des filets de pêche, de dégâts sur les cultures céréalières et de quelques accidents mortels. [less ▲]

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See detailDe meisje heeft de boek niet gelezen, maar wel het krant. Genus in het Nederlands van anderstaligen
Rasier, Laurent ULg; Hiligsmann, Philippe

Conference (2009)

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See detailGezelle met valse noten
Steyaert, Kris ULg

in Spiegel der Letteren (2009), 51(3), 410-413

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See detailLa géographie, ça sert, d'abord, à faire le Monde
Breuer, Christophe ULg

in Bulletin de la Société Géographique de Liège (2009), 52

The geography is directly confronted with the societies’ problems, which it tries to answer by using its particular point of view. Specificities of the discipline generate innovation and at same time pose ... [more ▼]

The geography is directly confronted with the societies’ problems, which it tries to answer by using its particular point of view. Specificities of the discipline generate innovation and at same time pose a permanent epistemological questioning, which makes the orientation of the young geographers particularly complex. [less ▲]

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See detailResponse of floodplain sedimentation to catchment disturbances in different environments
Notebaert, Bastiaan; Houbrechts, Geoffrey ULg; Verstraeten, Gert et al

Poster (2009)

Holocene floodplain sediments are an important environmental archive, that can be accesed for reconstructing the past landscape dynamics either qualitatively (e.g. palynology) and quantitatively (e.g ... [more ▼]

Holocene floodplain sediments are an important environmental archive, that can be accesed for reconstructing the past landscape dynamics either qualitatively (e.g. palynology) and quantitatively (e.g. sediment budgeting). In this study Holocene alluvial sediment deposition in two contrasting Belgian catchments was quantified and dated: the Lienne (148 km²) in the Ardennes massif and the Dijle (750 km2) in the loess region. These catchments experienced a comparable Holocene climatic variation, but differ in topography and geology with highest relief energy in the Lienne catchment. Land use history also differs with high land use intensities in the Dijle catchment since Roman times, but at least since the Middle Ages there were also large deforestations in the Lienne catchment. Detailed cumulative Holocene sediment deposition was assessed for each catchment using more then 1000 hand augerings. Detailed radiocarbon dating of fluvial deposits was performed in the Dijle catchment, while iron slag was used as a tracer for sediments deposited after 1350 AD in the Lienne catchment. Results show that sediment deposition is much larger in the Dijle catchment (~4.5 Mg ha-1 catchment area) then in the Lienne catchment (~0.2 Mg ha-1 catchment area). Dating results from the Dijle catchment show an increase of sediment deposition in the late Holocene, first starting in the colluvial valleys and later on prograding towards the main valleys. Variations in sedimentation rates can clearly be related to anthropogenous land use pressure, and the majority of the sediments found in colluvial and alluvial valleys were deposited in the last 4000 years, and in many cases even in the last 1000 years. Variations in sediment deposition within the catchment can partially be explained by differences in river valley physical settings (mainly valley slope), while in other cases hill slope sediment delivery (upstream erosion, connectivity between hill slopes and the river system) is the explaining factor. In the Lienne catchment, between 80 and 100% of the sediments present in the main valley were deposited before 1350AD, thus before the main period of forest clearance. On the other hand, about 50% of the Holocene sediment present in a main tributary was deposited after 1537 (local start of iron industry). This difference with the main valley can be explained by a difference in physical settings of the river (valley slope, stream power). These results show that the physical settings of river valleys determine how sensible the river systems are to catchment disturbances. Floodplain deposition is determined by an interplay of hill slope sediment delivery (hill slope erosion and connectivity) and physical settings of the valley itself (valley slope, discharge). As a result, quantification of floodplain deposition alone, cannot be used as a measure for historic soil erosion within a catchment or to determine intensity of human impact on the catchment. [less ▲]

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See detailNormalizing speech transcriptions for Natural Language Processing
Dister, Anne; Constant, Matthieu; Purnelle, Gérald ULg

in Proceedings of the 3rd International Conference on Spoken Communication (GSCP'09) (2009)

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See detailFirst record of the 'bathroom mothmidge' Clogmia albipunctata, a conspicuous element of the Belgian fauna that went unnoticed (Diptera: Psychodidae)
Boumans, Louis; Zimmer, Jean-Yves ULg; Verheggen, François ULg

in Phegea (2009), 37(4), 153-160

The 'bathroom fly' Clogmia albipunctata (Williston, 1893) (Diptera: Psychodidae) is a cosmopolitan species that is commonly found in bathrooms, kitchens, sewage treatment plants and compost heaps. Of ... [more ▼]

The 'bathroom fly' Clogmia albipunctata (Williston, 1893) (Diptera: Psychodidae) is a cosmopolitan species that is commonly found in bathrooms, kitchens, sewage treatment plants and compost heaps. Of circumtropical origin, the species probably spread to synanthropic habitats in northern and central Europe during the past decades. The first documented findings in Belgium are discussed, together with general information on the biology and recognition of the species. [less ▲]

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See detailEvaluation of saturation and microcracking of the superficial zone of concrete: new developments
Courard, Luc ULg; Lenaers, Jean-François

in Alexander, M. G.; Beushausen, H.-D.; Dehn, F. (Eds.) et al Concrete Repair, Rehabilitation and Retrofitting II (2009)

Proper surface preparation is essential for the durability of the repaired structure as well as specific saturation level of the concrete. Moreover, the repair material is often blamed for “not sticking” ... [more ▼]

Proper surface preparation is essential for the durability of the repaired structure as well as specific saturation level of the concrete. Moreover, the repair material is often blamed for “not sticking”, but the general source of the trouble lies with the substrate surface conditioning. The extensive research project has been undertaken to develop specifications and performance criteria for surface preparation of concrete substrates, one of the tasks of which was to develop a field test to evaluate the optimum moisture conditioning of the substrate concrete prior to application of repair material. The Autocalm system has been calibrated and compared with destructive and non destructive tests (Schmidt hammer, microscope observations and water absorption) on three types of concrete and two types of surface preparation. In order to evaluate different saturation levels, concrete samples have been stored in more than 12 modes of conservation. [less ▲]

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