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See detailCost-effective media for the rapid and high resolution of small DNA fragments using polyacrylamide-based electrophoresis
Negro, S. S.; Cloots, Rudi ULg; Gemmell, N. J.

in Molecular Ecology Notes (2006), 6(3), 609-612

Current Tris-based solutions for DNA electrophoresis produce a positive feedback loop between current and temperature at high voltage, resulting in long running times for the separation of even small DNA ... [more ▼]

Current Tris-based solutions for DNA electrophoresis produce a positive feedback loop between current and temperature at high voltage, resulting in long running times for the separation of even small DNA fragments. We optimized the separation of small DNA fragments (90-300 bp) in polyacrylamide-based electrophoresis at high voltages (200volts/cm) by substituting Tris with low concentration alkali salts (e.g. 1 mm LiCl and CsCl). These media reduced the heat produced during electrophoresis, enhanced the DNA fragment resolution, and allowed gels to be run at higher voltages, reducing gel running times by 25%. In addition, the elimination of Tris and EDTA from the buffer reduced material costs approximately 10-fold. © 2006 The Authors. [less ▲]

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See detailHet recht op aftrek ratione temporis bis
Peeters, Bart ULg

in Tijdschrift voor Fiscaal Recht (2006)

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See detailClostridia and enterotoxaemia
Mainil, Jacques ULg

Conference (2006)

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See detailUn master en ligne sous la loupe
Poumay, Marianne ULg

in Distances et Savoirs (2006), 4(1),

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See detailPercutaneous coronary intervention for bifurcation disease.A consensus view from the first meeting of the European Bifurcation Club.
Thomas, Martyn; Hildick-Smith, David; Louvard, Yves et al

in EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology (2006), 2(2), 149-53

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See detailSheep do have opinions
Despret, Vinciane ULg

in Latour Bruno, Weibel Peter (Ed.) Making Things Public. Atmospheres of Democracy (2006)

For the past few years the inhabitants of a hamlet on the outskirts of the village of Ingleton in Yorkshire, England, have been witnessing a strange exercise every morning. A woman, said to have been one ... [more ▼]

For the past few years the inhabitants of a hamlet on the outskirts of the village of Ingleton in Yorkshire, England, have been witnessing a strange exercise every morning. A woman, said to have been one of the most renowned primatologists in the English-speaking world, spends her day in a field in front of her house, observing animals that she has put there. As she did during her many years of field work in Africa studying apes, primatologist Thelma Rowell patiently notes all the movements, anecdotes and tiny events making up the daily social life of the animals to which she is currently devoting her time. Admittedly, these animals are different to the ones she was used to spending time with: the relations are not characterized by the same intensity, the behaviors are peculiar to the species, the communication does not always pass by the same channels, and the events seem to take place at another pace. But as far as their social expertise is concerned, these animals are certainly on a par with apes. [less ▲]

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See detailPensions with heterogenous individuals and endogenous fertility
Cremer, Helmuth; Gahvari, Firouz; Pestieau, Pierre ULg

in Journal of Population Economics (2006), (21), 961-981

This paper studies the design of pension schemes in a society where fertility is endogenous and parents differ in their ability to raise children. In a world with perfect information, a pay-as-you-go ... [more ▼]

This paper studies the design of pension schemes in a society where fertility is endogenous and parents differ in their ability to raise children. In a world with perfect information, a pay-as-you-go social security system is characterized by equal pensions for all but different contributions which may or may not increase with the number of children. Additionally, fertility must be subsidized at the margin to correct for the externality that accompanies fertility. In a world of asymmetric information, incentiverelated distortions supplement the Pigouvian subsidy. These may either require an additional subsidy or an offsetting tax on fertility depending on whether the redistribution is towards people with more or less children. In the former case, pensions are decreasing in the number of children; in the latter case, they are increasing. [less ▲]

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See detailExperimental evidences of a structural and dynamical transition in fish school
Becco, Christophe ULg; Vandewalle, Nicolas ULg; Delcourt, Johann ULg et al

in Physica A: Statistical Mechanics and its Applications (2006), 367

We have developed a video tracking system in order to determine all the trajectories of young fish (Oreochromis niloticus L.) within a school. Both individual and collective behaviours have been studied ... [more ▼]

We have developed a video tracking system in order to determine all the trajectories of young fish (Oreochromis niloticus L.) within a school. Both individual and collective behaviours have been studied as a function of the number of fish per unit area. By studying distributions of distances between fish and distributions of relative orientations, structural effects and cooperative motions have been evidenced. Signatures of a phase transition have been found, as predicted by some numerical models. This work opens new perspectives in the study of collective phenomena in biological systems since it is the first time that such measurements are possible. [less ▲]

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See detailMechanochemistry: targeted delivery of single molecules
Duwez, Anne-Sophie ULg; Cuenot, Stéphane; Jérôme, Christine ULg et al

in Nature Nanotechnology (2006), 1

The use of scanning probe microscopy-based techniques to manipulate single molecules(1) and deliver them in a precisely controlled manner to a specific target represents a significant nanotechnological ... [more ▼]

The use of scanning probe microscopy-based techniques to manipulate single molecules(1) and deliver them in a precisely controlled manner to a specific target represents a significant nanotechnological challenge(2,3). The ultimate physical limit in the design and fabrication of organic surfaces can be reached using this approach. Here we show that the atomic force microscope (AFM), which has been used extensively to investigate the stretching of individual molecules(4-12), can deliver and immobilize single molecules, one at a time, on a surface. Reactive polymer molecules, attached at one end to an AFM tip, are brought into contact with a modified silicon substrate to which they become linked by a chemical reaction. When the AFM tip is pulled away from the surface, the resulting mechanical force causes the weakest bond - the one between the tip and polymer - to break. This process transfers the polymer molecule to the substrate where it can be modified by further chemical reactions. [less ▲]

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See detailNew host and geographical distribution for the pearlfish Carapus mourlani (Pisces, Carapidae) with a discussion on Carapini nomenclature and biogeography
Parmentier, Eric ULg; Mercier, Annie; Hamel, Jean-François

in Copeia (2006), 2006

Specimens of the pearlfish Carapus mourlani (Carapidae) were observed for the first time in association with the sea cucumber Isostichopus fuscus (Holothuroidea: Echinodermata) along the coast of Ecuador ... [more ▼]

Specimens of the pearlfish Carapus mourlani (Carapidae) were observed for the first time in association with the sea cucumber Isostichopus fuscus (Holothuroidea: Echinodermata) along the coast of Ecuador. Out of 4345 sea cucumbers collected from various depths between 5 and 60 m, 12 harbored a pearlfish either in the coelomic cavity, the respiratory tree, or the digestive tract, yielding a prevalence of ca. 0.0028. The presence of C. mourlani appeared to be detrimental to the holothurian host in some cases. Side effects resulting from coelomic cavity infections included less advanced gonad maturity (reduced gonadal tubule diameter and length, lower ratio of mature oocytes) and a significant proportion of necrotic and shriveled gonadal tubules, devoid of gametes. Aside from discussing this evidence, the present paper briefly describes the biology of the pearlfish, its relationship with the host, and its daily activity cycle. [less ▲]

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See detailEvaluation of a portable equine metabolic measurement system
Duvivier, V. H.; Van Erck, Emmanuelle; De Moffarts, Brieuc et al

in 7th International Conference on Equine Exercise Physiology (2006)

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See detailRéseaux et bases de données
Dozo, Björn-Olav ULg; Fréché, Bibiane

in Denis, Benoît; de Marneffe, Daphné (Eds.) Les Réseaux littéraires (2006)

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See detailRole of lipopeptides in the biological control activity of Bacillus subtilis
Ongena, Marc ULg; Jourdan, E.; Adam, A. et al

Conference (2006)

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See detailEvolution of a dozen non-CO2 greenhouse gases above Central Europe since the mid-1980s.
Zander, Rodolphe ULg; Mahieu, Emmanuel ULg; Demoulin, Philippe ULg et al

in Proceedings of the 4th International Symposium on Non-CO2 Greenhouse Gases (2006)

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See detailAperçu de l’histoire du Trésor de la cathédrale de Liège
George, Philippe ULg

in Bulletin de la Société Royale Le Vieux-Liège (2006), t. XV, n° 314

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See detailInvasion intracellulaire des cellules non-phagocytaires par Staphylococcus aureus
Boulanger, Delphine; Bureau, Fabrice ULg; Lekeux, Pierre ULg

in Annales de Médecine Vétérinaire (2006), 150(1), 27-42

Intracellular invasion of Staphyloccocus aureus in nonphagocytic cells Staphylococcus aureus often causes chronic diseases. It is now believed that recurrence of these infections could be related to the ... [more ▼]

Intracellular invasion of Staphyloccocus aureus in nonphagocytic cells Staphylococcus aureus often causes chronic diseases. It is now believed that recurrence of these infections could be related to the ability of S. aureus to invade and persist within nonphagocytic cells. Adherence to eucaryotic cells is crucial for S. aureus to invade and persist within invasion and depends on interactions between bacterial fibronectin-binding proteins, fibronectin and the host cell fibronectin receptor, integrin alpha(5)beta(1). It is currently established that fibronectin acts as a bridging molecule. Penetration of S. aureus in host cells requires also activation of protein tyrosine kinases that mediate signal transduction and actin polymerization leading to cytoskeletal rearrangements. After internalization, S. aureus either remains in membrane-bound vacuoles or appears free in the cytoplasm. After bacterial proliferation, S. aureus induces host cell apoptosis or persist inside cells as small colony variants, which represent a less virulent subpopulation of S. aureus that grows slower. Although numerous in vitro and in vivo studies have demonstrated the ability of S. aureus to invade nonphagocytic cells, additional experiments have to be realized to understand the relevance of intracellular localization in vivo. [less ▲]

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See detailLe rôle prépondérant de la sanction financière et sa proportionnalité en droit pénal social
Kefer, Fabienne ULg

in Born, Michel; Lemaître, André (Eds.) Une criminologie de la tradition à l'innovation, En hommage à Georges Kellens (2006)

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