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See detailDrawing-up of pesticide selectivity lists to beneficial arthropods for IPM programmes in potato.
Hautier, L.; Jansen, J. P.; Schiffers, Bruno ULg et al

in Communications in agricultural and applied biological sciences (2004), 69(3), 171-182

In order to promote IPM programmes in potato, the toxicity of 19 fungicides, 4 herbicides and 11 insecticides commonly used in this crop in Belgium was assessed on three beneficial arthropods. These ... [more ▼]

In order to promote IPM programmes in potato, the toxicity of 19 fungicides, 4 herbicides and 11 insecticides commonly used in this crop in Belgium was assessed on three beneficial arthropods. These species were representative of the most important aphid specific natural enemies encountered in potatoes: a parasitic wasp--Aphidius rhopalosiphi (De Stefani-Perez) (Hym., Aphidiidae), a ladybird--Adalia bipunctata (L.) (Col., Coccinellidae) and a hoverfly--Episyrphus balteatus (Dipt., Syrphidae). In a first time, pesticides were tested on glass plates on A. rhopalosiphi adults and A. bipunctata and E. balteatus larvae. For each insect, products inducing corrected mortality (Mc) lower than 30% were directly classified in a positive list for harmless products (green list). The other compounds were further tested on plants and listed in toxicity classes according to mortalities induced during this extended laboratory test: harmless (Mc < 30%), slightly harmful (30% < Mc < 60%), moderately harmful (60% < Mc < 80%) and harmful (Mc > 80). A chemical determination of pesticides residues was also performed for each experiment in order to determine the exposure of beneficial arthropods to pesticide residues and to validate the application of chemicals on tested substrates. On the basis of the results of acute toxicity tests, the period of each pesticide use according to normal agricultural practices and the abundance and importance of the three different groups of aphid natural enemies at different periods of the year, four pesticides lists were built up. Each list corresponded to a different period of pesticides application: Period I--from seedling to beginning of June (based on A. rhopalosiphi tests), Period II--beginning to end of June (based on A. rhopalosiphi tests), Period III beginning to end of July (based on E. balteatus and A. bipunctata tests) and Period IV--August to harvest (no exposure of beneficials). Results showed that herbicides were not toxic to the three species and can be used according to normal agricultural practices without restrictions. All fungicides can also be used without restrictions at recommended rates. Only the mixture Metalaxyl-M + Fluazinam was slightly harmful to A. bipunctata but had no effects on A. rhopalosiphi and E. balteatus. Results were more contrasted for insecticides and none of them was totally selective for all the 3 beneficial arthropods. Therefore, they can only be used with restrictions at periods II and III, according to the beneficial species that need to be protected. [less ▲]

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See detailDrawn in by the unpredictable: reward uncertainty broadens the spotlight of incentive salience attribution
Robinson, Mike J.F.; Fischer, Adam M.; Anselme, Patrick ULg et al

Poster (2012, May 19)

The motivational value assigned to cues (CSs) associated with reward (UCS) is known as incentive salience, and is determined through the synergy of previous learning of the CS-UCS association (the sum of ... [more ▼]

The motivational value assigned to cues (CSs) associated with reward (UCS) is known as incentive salience, and is determined through the synergy of previous learning of the CS-UCS association (the sum of experiences an individual has with that cue-reward combination) and the mesolimbic state of the individual at the time of cue re-encounter. Typically, the amount of incentive salience attributed to a cue is believed to increase with the relative reliability that the cue predicts reward, where cues that consistently predict reward become powerful motivational magnets, eliciting approach and even consummatory behaviors (similar to those produced by the reward itself). In contrast, cues that predict reward with a lesser degree of certainty should theoretically be less attractive, and accrue lower levels of incentive salience. However, in some cases, cues that predict reward with maximal levels of uncertainty, such as in gambling, may generate higher levels of incentive salience attribution and become very attractive. In order to examine the impact of uncertainty, we used a Pavlovian conditioned approach task (autoshaping), where a bright noisy lever cue precedes delivery of a sucrose reward pellet. We have previously shown that a cue that predicts a reward only half the time (probability = 50%), but where the value of that reward can vary (1, 2 or 3 sucrose pellets), attracts more incentive value than a cue that systematically (probability = 100%) predicts a single sucrose reward pellet. Here we examined whether the increased incentive value attributed to uncertain cues was equally distributed across cues that were proximal (5 cm) or distal (20 cm) to the site of reward (magazine). Our results confirm that incentive value is greater for uncertain cues, and show that it is equally distributed across proximal and distal cues. In contrast, when the CS cue predicts the UCS reward with absolute certainty, incentive value is preferentially given to proximal cues, with distal cues being almost ignored. This suggests that reward uncertainty not only attributes more incentive value to cues, but that it may also act by recruiting a broader range of cues. However, since the learnt predictive value of the cue is low, this increase in incentive salience may be generated through greater mesolimbic activity driven by anticipation and/or stress of an unpredictable reward. In conclusion, reward uncertainty may transform a broad array of cues into powerful motivational magnets, which in turn could help explain what makes gambling so attractive. [less ▲]

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See detailDRC1 expression on normal and pathological lymphoid cells.
Antoine, Nadine ULg; Heinen, Ernst ULg; Marcoty, C. et al

in Advances in Experimental Medicine and Biology (1993), 329

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See detailDre-miR-2188 Targets Nrp2a and Mediates Proper Intersegmental Vessel Development in Zebrafish Embryos.
Soares, Ana R.; Reverendo, Marisa; Pereira, Patricia M. et al

in PLoS ONE (2012), 7(6), 39417

BACKGROUND: MicroRNAs (miRNAs) are a class of small RNAs that are implicated in the control of eukaryotic gene expression by binding to the 3'UTR of target mRNAs. Several algorithms have been developed ... [more ▼]

BACKGROUND: MicroRNAs (miRNAs) are a class of small RNAs that are implicated in the control of eukaryotic gene expression by binding to the 3'UTR of target mRNAs. Several algorithms have been developed for miRNA target prediction however, experimental validation is still essential for the correct identification of miRNA targets. We have recently predicted that Neuropilin2a (Nrp2a), a vascular endothelial growth factor receptor which is essential for normal developmental angiogenesis in zebrafish, is a dre-miR-2188 target. METHODOLOGY: Here we show that dre-miR-2188 targets the 3'-untranslated region (3'UTR) of Nrp2a mRNA and is implicated in proper intersegmental vessel development in vivo. Over expression of miR-2188 in zebrafish embryos down regulates Nrp2a expression and results in intersegmental vessel disruption, while its silencing increases Nrp2a expression and intersegmental vessel sprouting. An in vivo GFP sensor assay based on a fusion between the GFP coding region and the Nrp2a 3'UTR confirms that miR-2188 binds to the 3'UTR of Nrp2a and inhibits protein translation. CONCLUSIONS: We demonstrate that miR-2188 targets Nrp2a and affects intersegmental vessel development in zebrafish embryos. [less ▲]

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See detailDREAM 2012: DEVELOPMENT OF LAPAROSCOPIC SURGERY AT THE UNIVERSITY HOSPITAL OF KINSHASA, DRC
Nsadi Fwene, Berthier ULg; Veyi, D; Kazadi, J et al

in Acta Chirurgica Belgica (2012, May), 112(3), 8240

Objectives: The technical nature of laparoscopy, and the required specific laparoscopic tools and medical skills, may render this approach difficult in developing countries. We hypothesized that ... [more ▼]

Objectives: The technical nature of laparoscopy, and the required specific laparoscopic tools and medical skills, may render this approach difficult in developing countries. We hypothesized that laparoscopy may be developed in the Cliniques Universitaires de Kinshasa (CUK), and may be cost-effective. The final aim of this program is to bring the benefits of laparoscopy to the DRC population, by allowance of adequate training on the UNIKIN personnel, including anaesthetists, surgeons and nurses, who in the future will have to locally form the DRC medical and nursery students. Methods: With the financial support from Wallonie-Bruxelles International (WBI), a complete CUK team, including a surgeon (2 years training in Belgium), an anaesthetist and nurses, were trained in Belgium and then afterwards in DRC. The laparoscopic equipment was sent to Kinshasa, and three theoretical and practical missions of Belgian teams were organised. Results: Over a 2 year period, 116 laparoscopic procedure were performed, including 32 appendectomies, 41 cholecystectomies, 11 hernia repairs, 9 laparoscopy explorations for peritoneal carcinoma assessment and biopsy, 8 procedures for catheter of dialysis peritoneal, 5 gynecologics procedures, and 10 other miscellaneous procedures. Conclusions: A joined approach, taking into account on one hand the training of the skills locally trained to adapt itself to some difficulties, on the other hand institutions of scientific support and a real program and local will of development of this new procedure are the wages of development, accessibility and durability of such news approach in developing countries. All University and non-University team willing to join such a project are welcome. [less ▲]

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See detailDREAM 2020: Development of laparoscopic surgery and endoscopy in the university hospital of Kinshasa, DRC
Nsadi, Berthier; Veyi, D.; Kazadi, J. et al

in Acta Gastro-Enterologica Belgica (2011, March), 74(1), 14

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See detailDream and emotion regulation: insight from the ancient art of memory.
Desseilles, Martin ULg; Duclos, Catherine

in The Behavioral and brain sciences (2013), 36(6), 614634-59

During dreaming, as well as during wakefulness, elaborative encoding, indexing and ancient art of memory (AAOM) techniques, such as the method of loci, may coincide with emotion regulation. These ... [more ▼]

During dreaming, as well as during wakefulness, elaborative encoding, indexing and ancient art of memory (AAOM) techniques, such as the method of loci, may coincide with emotion regulation. These techniques shed light on the link between dreaming and emotional catharsis, post-traumatic stress disorder, supermemorization during sleep as opposed to wakefulness, and the developmental role of rapid eye movement (REM) sleep in children. [less ▲]

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See detailDreaming: a neuroimaging view
Dang Vu, Thien Thanh ULg; Desseilles, Martin ULg; Albouy, Geneviève ULg et al

in Schweizer Archiv Fur Neurologie und Psychiatrie (2005), 156

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See detailDreaming: A Neuropsychological View
Schwartz, Sophie; Dang Vu, Thien Thanh ULg; Ponz, Aurelie et al

in Schweizer Archiv für Neurologie und Psychiatrie = Archives Suisses de Neurologie et de Psychiatrie = Archivio Svizzero di Neurologia e Psichiatria (2005), 156(8), 426-439

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See detailDrei Auferweckungsszenen Lüttich (?) um 1030-1050
George, Philippe ULg

in Canossa. Erschütterung der Welt, t. II Catalogue n° 453, p. 348-350. (2007)

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See detailDrei Thesen zur Literaturdidaktik im Fremdsprachenunterricht
Vanhaegendoren, Koen ULg

in Epos. Revista de filología (2004), 20-21

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See detailDas Drei-Körper-Coulombproblem unter periodischem Antrieb
Schlagheck, Peter ULg

Doctoral thesis (1999)

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See detailLa drépanocytose : affection exotique ou problème de santé publique en Belgique?
Gulbis, B; Ferster, A; Kentos, A et al

in Revue Médicale de Bruxelles (2005), 26(4), 309-13

Sickle cell disease is a genetic disorder involving the haemoglobin designated as haemoglobin S, an autosomic recessive hereditary disease. It is the most frequent hereditary disease in sub-Saharan Africa ... [more ▼]

Sickle cell disease is a genetic disorder involving the haemoglobin designated as haemoglobin S, an autosomic recessive hereditary disease. It is the most frequent hereditary disease in sub-Saharan Africa, however epidemiological studies performed with a systematic neonatal screening in Brussels and Liège have proven that more than one neonate over 2.000 has a sickle cell disease. If this amount is significant, at the level of each physician the number of patient-contacts will be weak. Another aspect of the disease is the variability in its expression: some patients suffer from multiple and chronic organ alterations while other suffer also from acute events which might lead to death if not treated appropriately. The poor experience of each physician, the lack of the disease knowledge by the population, the symptoms complexity, and the socio-economical aspects of sickle cell disease explain that it can be considered as an "exotic" disease but also as a public health problem. A global and dedicated approach of the patient as a whole must be implemented. This is the reason for the existence of the "Réseau des Hémoglobinopathies": http://www.redcellnet.be/. [less ▲]

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See detailDrift of tilted shielded rotary atomisers based on wind tunnel measurements
Ouled Taleb Salah, Sofiene ULg; Massinon, Mathieu ULg; De Cock, Nicolas ULg et al

in Proceedings of International Symposium on Crop Protection Ghent 2015 (2015)

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See detailDrift potential of tilted shielded rotary atomisers based on wind tunnel measurements
Ouled Taleb Salah, Sofiene ULg; Massinon, Mathieu ULg; De Cock, Nicolas ULg et al

in 67th International Symposium on Crop Protection (2015, May 19)

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See detailA drifting impact oscillator with periodic impulsive loading: Application to percussive drilling
Depouhon, Alexandre ULg; Denoël, Vincent ULg; Detournay, Emmanuel

in Physica D: Nonlinear Phenomena (2013), 258(0), 1--10

Detailed reference viewed: 27 (2 ULg)