References of "2009"
     in
Bookmark and Share    
See detailPhysiologie Digestive
Khan, Naim Akhtar; Roman, Sabine; Peulen, Olivier ULg et al

in Guénard, Hervé (Ed.) Physiologie Humaine (2009)

Detailed reference viewed: 97 (3 ULg)
Full Text
Peer Reviewed
See detailEx vivo expansion of hematopoietic progenitor cells is associated with downregulation of alpha4 integrin- and CXCR4-mediated engraftment in NOD/SCID beta2-microglobulin-null mice
Foguenne, Jacques ULg; Di Stefano; Giet, Olivier ULg et al

in Haematologica (2009), 94

Several studies indicate that ex vivo cytokine-supported expansion induces defective hematopoietic stem cell engraftment. We investigated the role of alpha4 integrin, alpha5 integrin and CXCR4 in ... [more ▼]

Several studies indicate that ex vivo cytokine-supported expansion induces defective hematopoietic stem cell engraftment. We investigated the role of alpha4 integrin, alpha5 integrin and CXCR4 in engraftment of unmanipulated and cytokine-treated human cord blood CD34+ cells. [less ▲]

Detailed reference viewed: 39 (18 ULg)
Full Text
Peer Reviewed
See detailLa conservation du poisson au Senegal : utilisation d’une souche locale de Lactococcus lactis
Diop, Michel; Destain, Jacqueline ULg; Thonart, Philippe ULg et al

in Cahiers Agricultures (2009), 18(4), 337-342

L’effet antimicrobien du surnageant de culture neutralisé (SCN) bactéricide issu de Lactococcus lactis CWBI-B1410 d’origine locale, utilisé seul ou en combinaison avec du chlorure de sodium (NaCl) comme ... [more ▼]

L’effet antimicrobien du surnageant de culture neutralisé (SCN) bactéricide issu de Lactococcus lactis CWBI-B1410 d’origine locale, utilisé seul ou en combinaison avec du chlorure de sodium (NaCl) comme conservateurs, a été évalué sur poissons maigre (Pomadasys jubelini), moyennement gras (Polydactylus quadrifilis) et gras (Arius heudeloti)] au Sénégal. Les poissons ont été achetés dans un marché local, éviscérés, lavés avec de l’eau de robinet potable, puis filetés. Cent millilitres de SCN de CWBI-B1410 non salé et salé ont été additionnés dans 100 grammes de filets (concentration finale de NaCl entre 0 et 7 %) dans des bocaux en verre conservés à 10 °C. L’évolution de la flore mésophile totale (FMT) des filets a été comparée à celles de filets traités avec du SCN non salé et salé (concentration finale de NaCl entre 0 et 7 %), issu de L. lactis LMG6890 ne produisant pas de bactériocine. Un niveau de FMT de 106 micro-organismes par gramme (ufc/g) a été considéré comme la fin de la durée de conservation. Le niveau de la flore mésophile totale des filets crus atteignait 5,74 log ufc/g. L’ajout de SCN de CWBI-B1410 dans les filets de poisson maigre réduit la flore mésophile totale de 1 log ufc/g et stabilise la flore pendant 4 jours – correspondant à la durée de conservation de ces filets a` 10 °C, contre 0,5 jour pour le contrôle négatif. L’addition de SCN de CWBIB1410 salé sur les poissons (NaCl, 7 %) réduit davantage la FMT et retarde sa croissance à 10°C, entraînant comme résultat l’augmentation de la durée de conservation de respectivement 12, 7,5 et 8 jours pour le poisson maigre, moyennement gras et gras. Ces résultats suggèrent que cette stratégie peut constituer un moyen convenable d’améliorer la conservation des produits halieutiques tropicaux. [less ▲]

Detailed reference viewed: 44 (2 ULg)
Full Text
See detailDéveloppement durable des races bovines locales menacées
Bay, Elodie

Article for general public (2009)

Le projet EURECA a pour but d'assister la conservation, le développement et l'utilisation des races bovines locales, et ce en se basant sur l'étude de races locales dans 10 pays européens. Ce projet (d ... [more ▼]

Le projet EURECA a pour but d'assister la conservation, le développement et l'utilisation des races bovines locales, et ce en se basant sur l'étude de races locales dans 10 pays européens. Ce projet (d'une durée totale de 3 ans) est coordonné au niveau belge par le Faculté des Sciences Agronomiques de Gembloux. La première phase du projet, présentée dans cet article, a consisté à interroger des éleveurs et des parties prenantes à l'aide d'un formulaire standard, afin de comprendre comment s'intègre les races locales au niveau des différents intervenants. L'étude a porté sur la Pie Rouge Mixte (PRm) et la Blanc Bleu Mixte (BBm). [less ▲]

Detailed reference viewed: 241 (21 ULg)
Full Text
Peer Reviewed
See detailAre rapid changes in gonadal testosterone release involved in the fast modulation of brain estrogen effects?
Cornil, Charlotte ULg; Stevenson, Tyler J; Ball, Gregory F

in General and Comparative Endocrinology (2009)

Estradiol facilitates the expression of male sexual behavior in Japanese quail within a few minutes. These rapid behavioral effects of estradiol could result from rapid changes in its local production in ... [more ▼]

Estradiol facilitates the expression of male sexual behavior in Japanese quail within a few minutes. These rapid behavioral effects of estradiol could result from rapid changes in its local production in the preoptic area by aromatase, the enzyme converting testosterone into estradiol. Alternatively, aromatase activity may remain constant but fluctuations of local estradiol production could arise from rapid changes in the concentration of the enzymatic substrate, namely testosterone. Rapid increases of circulating testosterone levels have been observed in males of various species following social encounters. Surprisingly, in quail, the interaction with a female seems to result in a decrease in circulating testosterone levels. However, in that study conducted in quail, the samples were collected at intervals longer than the recently observed rapid effects of estradiol on sexual behavior. In the present study we investigated whether plasma testosterone concentrations fluctuate on a shorter time-frame. Eleven male were tested 5 min before and 5, 15 or 30 min after being allowed to have visual access to a female or to copulate with a female for 5 min. Both types of interactions resulted in a significant decline in circulating testosterone levels at latencies as short as 5 min. These data demonstrate that the decrease in testosterone levels is initiated shortly after sexual encounters. Because visual interactions with a female did not result in a rapid increase in testosterone concentrations, these findings rule out the possibility that a rapid rise in circulating testosterone levels participates in the rapid increase in brain estrogen synthesis and its facilitatory effects on copulatory behavior. [less ▲]

Detailed reference viewed: 43 (12 ULg)
Full Text
See detailLes quartiers durables : processus de production et reproductibilité
Marique, Anne-Françoise ULg

Master's dissertation (2009)

Detailed reference viewed: 127 (28 ULg)
Full Text
Peer Reviewed
See detailSélection d'espèces ligneuses adaptées à la fixation biologique de dunes au Niger
Laminou Manzo, Ousmane; Campanella, Bruno ULg; Paul, Roger ULg

in Geo-Eco-Trop (2009), 33

Seven woody species, of which five natives (Acacia senegal, A. raddiana, A. nilotica, Bauhinia rufescens, Balanites aegyptiaca) and two imported (Prosopis juliflora and P. chilensis) have been tested in ... [more ▼]

Seven woody species, of which five natives (Acacia senegal, A. raddiana, A. nilotica, Bauhinia rufescens, Balanites aegyptiaca) and two imported (Prosopis juliflora and P. chilensis) have been tested in terms of biological sand dunes fixation in the Southern east of Niger Republic. In nursery, species underwent a water stress by interrupting the watering during six days. Foliar hydration has been determined in order to evaluate their capacity to limit water loss. In a field experiment, species have been planted on a mechanically prefixed sand dune cord in order to test their ability for stabilization of sand dunes. Survival rates during the first three years have been calculated and height growth was measured. In nursery, results showed that, after six days of water stress, Acacia senegal, A. raddiana, P. chilensis and A. nilotica are the four species limiting the best the water losses. Results on site showed that the best combination in sand dunes fixation, in this zone, would be the association of one or the other of Prosopis (high survival rate and fast growth) with A. raddiana and/or A. nilotica (survival and growth relatively substantial and more important economic interest). [less ▲]

Detailed reference viewed: 31 (1 ULg)
See detailLa fédération canadienne
Fournier, Bernard ULg

in Fournier, Bernard; Reuchamps, Min (Eds.) Le fédéralisme en Belgique et au Canada : comparaison sociopolitique (2009)

Detailed reference viewed: 31 (9 ULg)
Full Text
Peer Reviewed
See detailDe la tolérance d'un solde débiteur d'un compte-espèces lié à un compte d'instruments financiers
Biquet, Christine ULg

in Journal des Juges de Paix = Tijdschrift van de Vrederecters (2009), (3-4), 278-280

Detailed reference viewed: 13 (3 ULg)
Peer Reviewed
See detailTargeted energy transfer for suppressing aeroelastic instability due to unsteady lift
Lee, Y. S.; Vakakis, Alexander F.; Bergman, L. A. et al

in Targeted energy transfer for suppressing aeroelastic instability due to unsteady lift, Palm Springs, 2009 (2009)

Detailed reference viewed: 14 (0 ULg)
Peer Reviewed
See detailNon-native variëteiten van het Nederlands: verwerving en didactiek
Rasier, Laurent ULg

Conference (2009)

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailCorrelation between the roughness of the substrate surface and the debonding risk
Perez, Fabien; Morency, Maxim; Bissonnette, Benoît et al

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

This paper presents the influence of substrate surface preparation on the adhesion strength of repaired beams system. Bond between new and old concrete has been the subject of a number of investigations ... [more ▼]

This paper presents the influence of substrate surface preparation on the adhesion strength of repaired beams system. Bond between new and old concrete has been the subject of a number of investigations, but in most cases, only adhesion strength was addressed. This parameter was used to estimate the durability and/or the debonding risk for repaired structure and it’s a generally accepted auditing standards. Usually, surface preparation of the substrate concrete is considered essential to achieve a durable repair because of its influence on the bond strength. To better understand debonding mechanism, in particular these related to surface preparation, roughness parameters were calculated to quantify the influence of surface preparation on the structural behaviour. Using this approach, repair beams prepared by way of four (4) concrete surface preparations were characterized. Results obtained show that repaired beams presenting a substrate with a rough surface permit to achieve a monolithic behaviour of the repaired system. Opposite structural behaviour, with large debonding, was recorded for those having smooth surface. However, all surface preparations used have promoted the same bond strength regardless the roughness of the substrate. The resulting analysis highlights the relation between roughness parameter αrough and the debonding mechanism of repaired beams. Such results will be useful to better predict the performance of concrete repairs. [less ▲]

Detailed reference viewed: 94 (7 ULg)
Full Text
Peer Reviewed
See detailThe resumptive pronoun in the relative clause in Late Egyptian
Winand, Jean ULg

in Journal of Egyptian Archaeology (2009), 95

Detailed reference viewed: 102 (12 ULg)
Full Text
Peer Reviewed
See detailDecoherence, entanglement and irreversibility in quantum dynamical systems with few degrees of freedom
Jacquod, Ph; Petitjean, Cyril ULg

in Advances in Physics (2009), 58(2), 67-196

In this review we summarize and amplify recent investigations of coupled quantum dynamical systems with few degrees of freedom in the short-wavelength, semiclassical limit. Focusing on the correspondence ... [more ▼]

In this review we summarize and amplify recent investigations of coupled quantum dynamical systems with few degrees of freedom in the short-wavelength, semiclassical limit. Focusing on the correspondence between quantum and classical physics, we mathematically formulate and attempt to answer three fundamental questions. (i) How can one drive a small dynamical quantum system to behave classically? (ii) What determines the rate at which two single-particle quantum-mechanical subsystems become entangled when they interact? (iii) How does irreversibility occur in quantum systems with few degrees of freedom? These three questions are posed in the context of the quantum-classical correspondence for dynamical systems with few degrees of freedom, and we accordingly rely on two short-wavelength approximations to quantum mechanics to answer them: the trajectory-based semiclassical approach on the one hand, and random matrix theory on the other hand. We construct novel investigative procedures towards decoherence and the emergence of classicality out of quantumness in dynamical systems coupled to external degrees of freedom. In particular, we show how dynamical properties of chaotic classical systems, such as local exponential instability in phase space, also affects their quantum counterparts. For instance, it is often the case that the fidelity with which a quantum state is reconstructed after an imperfect time-reversal operation decays with the Lyapunov exponent of the corresponding classical dynamics. For related reasons, but perhaps more surprisingly, the rate at which two interacting quantum subsystems become entangled can also be governed by the subsystem's Lyapunov exponents. Our method allows us to differentiate quantum coherent effects (those related to phase interferences) from classical ones (those related to the necessarily extended envelope of quantal wavefunctions) at each stage in our investigations. This makes it clear that all occurrences of Lyapunov exponents we witness have a classical origin, although they require rather strong decoherence effects to be observed. We extensively rely on numerical experiments to illustrate our findings and briefly comment on possible extensions to more complex problems involving environments with many interacting dynamical systems, going beyond the uncoupled harmonic oscillators model of Caldeira and Leggett. [less ▲]

Detailed reference viewed: 12 (1 ULg)
See detailPrésentation de "Philosophie et histoire des religions" de Béatrice Dessain
Steinmetz, Rudy ULg

Diverse speeche and writing (2009)

Detailed reference viewed: 48 (0 ULg)