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See detailPhospholipids quantification in vegetable oil degumming residues by HPLC-ELSD
Pierart, Céline ULg; Danthine, Sabine ULg; Wathelet, B et al

Poster (2008)

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Peer Reviewed
See detailUse of supercritical fluids technology (PGSS) for the production of betametazone loaded solid lipid microparticles
Nizet, Dominique; Jaspart, Séverine ULg; Brion, Michael et al

Poster (2008)

Detailed reference viewed: 59 (3 ULg)
Peer Reviewed
See detailCompositional protein analysis of HDL by SELDI-TOF MS during experimental endotoxemia
Levels, Johannes HM; Marée, Raphaël ULg; Geurts, Pierre ULg et al

Poster (2008)

Detailed reference viewed: 18 (0 ULg)
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See detailInfluence of nitrogen fertilizer treatments on soft wheat starch characteristics
Massaux, Carine; Sindic, Marianne ULg; Lenartz, Jonathan et al

Poster (2008)

Detailed reference viewed: 32 (0 ULg)
See detailAIRE role in melanoma
Conteduca, Giuseppina ULg

Poster (2008)

Polymorphisms of AIRE, a transcription factor that up-regulates intrathymic expression of tissue-specific antigens including melanoma-associated antigens (MAAs), may variably affect the selection of MAAs ... [more ▼]

Polymorphisms of AIRE, a transcription factor that up-regulates intrathymic expression of tissue-specific antigens including melanoma-associated antigens (MAAs), may variably affect the selection of MAAs-specific thymocytes, generating T-cell repertoires protecting or predisposing individuals to melanoma. We found that AIRE single nucleotide polymorphisms (SNPs) rs1055311, rs1800520 and rs1800522 were significantly more frequent in healthy subjects than in melanoma patients, independently from sex, age and stages of melanoma. The presence of these SNPs was associated with increased frequency of two T-cell clonotypes specific for MAGE-1 linking their protective effect to selection/expansion of MAA-specific T cells. Interestingly, mRNA transcribed on the rs1800520 SNP showed increased free energy than the wild type suggesting that its reduced stability may be responsible for the different activity of the polymorphic AIRE molecule. This finding may contribute at identifying subjects with increased risk of developing melanoma or patients with melanoma that may take benefit from immunotherapy. [less ▲]

Detailed reference viewed: 6 (0 ULg)
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See detailOptimisation of blocked designs in fMRI studies
Maus, Bärbel ULg; van Breukelen, G. J. P.; Goebel, R. et al

Poster (2008)

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See detailCesàrolite, a possible member of the birnessite group of minerals
Perchiazzi, Natale; Hatert, Frédéric ULg; Merlino, Stefano et al

Poster (2008)

Detailed reference viewed: 6 (0 ULg)
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See detailMechanisms of ATM regulation by TGF-beta
Paupert, Jenny ULg; Barcellos-Hoff, Mary-Helen

Poster (2008)

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See detailUrbanisme durable - Outil d'évaluation et d'aide à la conception de projets
Boniver, Véronique ULg; Dopagne, Claude ULg; Melin, Eric ULg et al

Poster (2008)

L'outil Urbadur mis au point permet de tester, d'évaluer et d'aider à la conception de nouveaux projets de constructions neuves. Il est accessible librement sur internet et permet à tout utilisateur ... [more ▼]

L'outil Urbadur mis au point permet de tester, d'évaluer et d'aider à la conception de nouveaux projets de constructions neuves. Il est accessible librement sur internet et permet à tout utilisateur potentiel de tester en amont un projet concret en répondant à une série de questions. Dans un second temps, sur base de l'évaluation obtenue et des commentaires fournis, l'utilisateur peut modifier son projet pour augmenter sa durabilité environnementale et tester celui-ci une nouvelle fois. L'outil pourrait être amélioré mais il permet déjà, dans sa version actuelle, de concevoir progressivement des projets de construction plus durables d'un point de vue environnemental. [less ▲]

Detailed reference viewed: 56 (14 ULg)
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See detailDINEOF univariate reconstruction of missing satellite data from the North Sea Belcolour-1 database.
Sirjacobs, Damien ULg; Alvera Azcarate, Aïda ULg; Barth, Alexander ULg et al

Poster (2008)

The Belcolour-1 database holds more than 4 years of uniformly resampled MERIS chlorophyll (CHL), total suspended matter (TSM), MODIS-AQUA CHL, TSM and sea surface temperature (SST) over the North Sea. A ... [more ▼]

The Belcolour-1 database holds more than 4 years of uniformly resampled MERIS chlorophyll (CHL), total suspended matter (TSM), MODIS-AQUA CHL, TSM and sea surface temperature (SST) over the North Sea. A first step of the RECOLOUR* project consists in the univariate reconstruction of missing data with the DINEOF method (Data Interpolating Empirical Orthogonal Functions). In particular, the DINEOF treatment of MERIS CHL and TSM images available for the year 2003 allowed an efficient synthesis of the coherent modes of variability existing at the scale of the whole North Sea. For both parameters, 4 modes were retained by general cross validation as an optimum for the reconstruction of missing data. For CHL, the first spatial mode shows the high influence of coastal nutrients outputs (mainly continental estuaries and diffused coastal sources) and the lower concentration in the well stratified central and northern part of the North Sea compared to the southern bight and the eastern English Channel. The spatial trends described by the first mode are permanent features during the year, although slightly enhanced during the summer and reduced during winter. The second spatial mode correspond to the main algal blooming events (spring and autumn) with increased concentrations in the whole southern bight of the north sea, around the Isle of Wight and in frontal alike structure north-west from Denmark. The third Eofs describes well the dynamics of an early phytoplankton bloom occurring in march along the Norwegian coast, where a strong stratification induced by an output of cold water from Baltic Sea provides good light conditions to phytoplankton. Concerning TSM, the first spatial mode shows the dominant influence of large estuaries and of resuspension from shallow coastal sedimental plains. The patterns suggest a general transport of sediments from south-east England up to the northern Dutch coastal waters, as a clear distinction between the stratified northern part and the well mixed and charged southern and German bights. Although these trends are permanent during the year, the range of the spatial variations are slightly reduced during the summer, following the reduction of resuspension, of total sediment outputed by rivers and of advection along continental coasts. The second mode shows a clear seasonal signal. The winter influence of the second spatial mode can be understood as general sediment enrichment due to higher resuspension, but a clear influence of intense winter terrestrial water outflows leading to lower sediment concentration in the plumes then in the surrounding waters. This is clear for the Elbe river discharge, the whole natural part of the Wadden Sea and the Seine river plume. The Scheelde and Thames rather seems to be just neutralizing the seasonal TSM resuspension signal. The Rhine river discharge seems to make exception as no influence is detected in the second spatial mode. During summer, the contribution of the second EOF is reversed with a general reduction of suspended matter concentration in most part of the area but some local sediment enrichment at specific river discharges. Original MERIS CHL and TSM images were filled and reconstructions were produced at a daily interval based on a linear interpolation of the temporal modes. From this, weekly averages could be calculated at stations such as the turbidity maximum of the Scheelde river plume, showing the onset of the spring bloom co-occurring with a period characterised both by the TSM seasonal reduction and by important TSM temporal variability. [less ▲]

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See detailDating an early medieval church by the luminescence method: the case of St Martin at Angers (France)
Blain, Sophie ULg; Prigent, Daniel; Guibert, Pierre et al

Poster (2008)

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See detailNew insights in auditory organ development: the inner pillar cell goes it own way
Thelen, Nicolas; Malgrange, B; Thiry, Marc ULg

Poster (2008)

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See detailAnalysis of lateral mobility of Ardenne rivers during the last centuries using iron slag
Houbrechts, Geoffrey ULg; Snijders, Jean-Philippe; Petit, François ULg

Poster (2008)

In the Ardenne region, old maps of different periods indicate that the layout of major rivers has been relatively stable since the end of the 18th century. However, given the scale of the different ... [more ▼]

In the Ardenne region, old maps of different periods indicate that the layout of major rivers has been relatively stable since the end of the 18th century. However, given the scale of the different documents and the relative inaccuracy of their georeferencing, it is not possible to precisely measure the rivers’ lateral erosion or to study the dynamic of small rivers. Moreover, maps older than the 18th century are not precise enough to permit this type of approach. Quantities of slag elements are present in the Ardenne rivers. These waste products come from hundreds of ironworks (blast furnaces and bloomeries) built close to different-sized rivers between the 14th and the 19th centuries. Slag was piled onto the floodplains and frequently thrown out directly into the rivers. For centuries, these slag elements were carried away during floods and were spread out along rivers. Given their properties, slag elements can be easily identified in sediments. When the slag elements are present in fine sediments at the point of contact with the gravel sheet, it means that the river has moved laterally since the inception of the iron industry, swept away older sediments and deposited more recent sediments contaminated by the slag. From historical studies, we precisely dated the periods of ironwork activity in several valleys. We also analysed the vertical concentrations of slag elements in several borings carried out along perpendicular cross sections. These data allowed us to estimate the lateral erosion velocity of some channels over several centuries. Moreover, we reconstructed the topography of several alluvial plains at the time ironworks were established and we evaluated sedimentation rates. [less ▲]

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See detailOperational monitoring of multi-qubit entanglement classes via tuning of local operations
Bastin, Thierry ULg; Thiel, C.; von Zanthier, J. et al

Poster (2008)

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailMechanism of sound production in Oreochromis niloticus
longrie, Nicolas; van Wassemberg, Sam; Mauguit, Quentin et al

Poster (2008)

Detailed reference viewed: 5 (0 ULg)
See detailOperational monitoring of multi-qubit entanglement classes with trapped ions
Bastin, Thierry ULg; Thiel, C.; von Zanthier, J. et al

Poster (2008)

Detailed reference viewed: 5 (1 ULg)
Peer Reviewed
See detailHistology and ultrastructure of the elastic spring apparatus in Synodontis eupterus
Fabri, Grégory; Montchowui, E; Vandewalle, Pierre ULg et al

Poster (2008)

Detailed reference viewed: 12 (0 ULg)
See detailSwitching entanglement classes via local operations
Bastin, Thierry ULg; Thiel, C.; von Zanthier, J. et al

Poster (2008)

Detailed reference viewed: 8 (0 ULg)
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See detailSox10 is not necessary for auditory neurons survival
Breuskin, I; Bodson, M; Thelen, Nicolas ULg et al

Poster (2008)

Detailed reference viewed: 5 (0 ULg)
See detailProgress towards new atomic species laser cooling
Krins, Stéphanie ULg; Saint-Georges, P.; Bastin, Thierry ULg

Poster (2008)

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailPurification of nuclear mRNPs, characterization of their content and function in transcription
Close, Pierre ULg; Skehel, M; East, P et al

Poster (2008)

Detailed reference viewed: 6 (0 ULg)
See detailTowards an iron magneto-optical trap
Krins, Stéphanie ULg; Saint-Georges, P.; Bastin, Thierry ULg

Poster (2008)

Detailed reference viewed: 41 (4 ULg)
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See detailRegulation of HIV late phase transcription by CTIP2
Cherrier, Thomas ULg; Rohr, Olivier

Poster (2008)

Detailed reference viewed: 1 (0 ULg)
See detailGeneration of symmetric Dicke states
Thiel, C.; von Zanthier, J.; Bastin, Thierry ULg et al

Poster (2008)

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailMagnetic resonance imaging arteriography of canine normal brain: an anatomic study
Jacqmot, Olivier ULg; Hoffmann, A. C.; Bustin, P. H. et al

Poster (2008)

Detailed reference viewed: 28 (8 ULg)
See detailLaser cooling of new atomic species - scheme of operation
Saint-Georges, P.; Krins, Stéphanie ULg; Bastin, Thierry ULg

Poster (2008)

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailProtein synthesis and folding is a rate limiting step for bacterial growth at low temperatures.
Piette, Florence; D'Amico, Salvino; Leprince, Pierre ULg et al

Poster (2008)

Detailed reference viewed: 8 (1 ULg)
See detailInteraction-free Generation of Angular Momentum Eigenstates in Remote Qubits
Thiel, C.; Maser, A.; Bastin, Thierry ULg et al

Poster (2008)

Detailed reference viewed: 2 (0 ULg)
Peer Reviewed
See detailDecreased Thymosin Beta 4 Expression Results in Poor Prognosis and Decreased Survival in Multiple Myeloma
CAERS, Jo ULg; Hose, Dirk; Kuipers, Ine et al

Poster (2008)

Detailed reference viewed: 14 (1 ULg)
Peer Reviewed
See detailIsolation of novel hydrolytic genes from an Antarctic metagenomic library
Pipers, D.; Berlemont, R.; Power, P. et al

Poster (2008)

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See detailThe effects of cognitive remediation therapy on AM deficits in schizophrenia patients
Boulanger, Marie ULg; Collet, Denis; Cornet, Lidvine et al

Poster (2008)

Schizophrenia is accompanied by deficit in autobiographical memories (AM). These impairments are correlated to difficulties in imagining specific events that might happen to them in the future ... [more ▼]

Schizophrenia is accompanied by deficit in autobiographical memories (AM). These impairments are correlated to difficulties in imagining specific events that might happen to them in the future (D’Argembeau, Raffard et Van-der-Linden, 2008). Previous study suggested that the specific autobiographical memory (past and future) may be improved by an AM remediation therapy (Blairy et al., accepted). The aim of the present study was to compare performances from individuals involved in an AM remediation intervention to individuals involved in the cognitive remediation therapy program from Brenner (IPT) (Pomini, Neis, Brenner, Hodel et Roder, 1998). The results showed that the participants tend to recall more specific events after therapies, confounded pass and future events (t(7) = 3.28 ; p = .013). These results would be promising for future research. [less ▲]

Detailed reference viewed: 36 (1 ULg)
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See detailThe TNF receptor signalling network: Modular modelling and cell-type specific analysis
Waldherr, S; Doszczak, M; Schliemann, Monica ULg et al

Poster (2008)

Detailed reference viewed: 17 (0 ULg)
Peer Reviewed
See detailFra-1 and its associated transcriptome are central determinants of human breast cancer metastasis
Desmet, Christophe ULg; Prieur, A; Reyal, F et al

Poster (2008)

Detailed reference viewed: 22 (1 ULg)
See detailBioethanol subproducts as a basis of plant biorefinery
Destain, Jacqueline ULg; Laurent, Pascal ULg; Ndoye, Bassirou et al

Poster (2008)

The philosophy of our research is built on the behaviour of non-sugar compounds from biomass during ethanolic fermentation. Saccharomyces cerevisiae, industrially used to bioconvert sugar into ethanol ... [more ▼]

The philosophy of our research is built on the behaviour of non-sugar compounds from biomass during ethanolic fermentation. Saccharomyces cerevisiae, industrially used to bioconvert sugar into ethanol under anaerobic conditions, assimilates some compounds present in the fermentable juice (proteins, amino acids,...). But others compounds are not used by the yeast. They leave in the vinasse after ethanol distillation and are thus concentrated by the process. Our purpose is to discuss the behaviour of betaine, saponins and raffinose in sugar juices (raw juice, thin juice, thick juice) and in vinasse after ethanolic fermentation. An attention will be given to some high added value products (like betaine) and the potentialities to use fermentation as a tool of purification in white chemistry. [less ▲]

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See detailMorphological echocardiographic measurements: reference values as a function of body size in equids
Al Haidar, A; Sandersen, Charlotte ULg; Van Erck, Emmanuelle et al

Poster (2008)

Detailed reference viewed: 11 (1 ULg)
Peer Reviewed
See detailPotential implication of host/symbiont recognition mechanisms in coral bleaching
Vidal-Dupiol, Jérémie; Mitta, Guillaume; Roger, Emmanuel et al

Poster (2008)

Bleaching in corals can be attributed to loss of endosymbiotic zooxanthellae and/or loss of photosynthetic pigments within zooxanthellae. This major disturbance of the reef ecosystem is principally ... [more ▼]

Bleaching in corals can be attributed to loss of endosymbiotic zooxanthellae and/or loss of photosynthetic pigments within zooxanthellae. This major disturbance of the reef ecosystem is principally induced by increases in water temperature. Since the beginning of the 80ís and the onset of global climate change, this phenomenon has been occurring at increasing rates and scales, and with increasing severity. In this study, we focused on finding early regulated genes involved in bleaching. In aquaria, one set of Pocillopora damicornis nubbins was subjected to a gradual seawater temperature increase from 28°C to 32°C over 15 days, and a second control set remained at constant temperature (28°C). Bleaching was monitored by measuring zooxanthellae density. The mRNA differentially expressed between the stressed state (sampled just before the onset of bleaching) and the non stressed state (control) were isolated from the nubbins by Suppression Subtractive Hybridization. The corresponding cDNA were sequenced and confronted to sequence databases to obtain gene similarities. Finally, transcription rates of the most interesting genes were conducted by Q-PCR. Two particularly interesting candidate genes showed an important decrease in their transcription rates following thermal stress and before zooxanthellae loss. These two genes show similarities with genes involved in host/symbiont and host/parasite models. The implication of these molecular actors suggests a possible role of recognition mechanisms between the host and its symbiont, in the breakdown of the symbiosis during the bleaching phenomenon. Experiments such as RACE-PCR, in situ hybridization and immunohistochemistry are currently underway to confirm our hypotheses. [less ▲]

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See detailA Critical Study of Primate Reintroduction Projects in the Mesoamerican Region.
Martin, Sarah ULg; Huynen, Marie-Claude ULg; Libois, Roland ULg

Poster (2008)

Very little is known about primate reintroduction projects in Mesoamerica. The aim of this study was to focus on existing projects concerning primate re-introductions, conservation-introduction ... [more ▼]

Very little is known about primate reintroduction projects in Mesoamerica. The aim of this study was to focus on existing projects concerning primate re-introductions, conservation-introduction, translocation, as well as on reinforcement-supplementation of parallel initiatives. In order to create a database, a survey was sent to a panel of scientists in Mexico, Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica and Panama, and we visited five projects in Costa Rica from March to August 2006. A total of 19 projects were found: Costa Rica hosted the higher number (7) while Salvador and Nicaragua did not host any. Fourteen out of those 19 projects concerned confiscated animals. Six of the 7 Costa Rican projects used confiscated primates; the other ones came from wild populations or were born in captivity. Alouatta palliata and Ateles geoffroyi are the most common species subject to reintroduction effort in the Mesoamerican region. A wide range of factors seem to influence reintroduction success such as: the project’s budget, the release site, the mode of transportation, the caging setting, the support from local communities, the presence of environmental education programs, but also the age of primates, etc. Each project seems to work as a completely separated entity, with its own definition of reintroduction success and its own policy. There’s no communication between the projects, no matter if they are based in the same country or work on the same species. A reintroduction guideline for this region should be established as well as a regional network coordinating the information. [less ▲]

Detailed reference viewed: 117 (11 ULg)
See detailSkill Learning and Repetition Priming in Alzheimer’s Disease
Merbah, Sarah ULg; Meulemans, Thierry ULg

Poster (2008)

Several studies have shown with the mirror reading paradigm that procedural learning and repetition priming might be preserved in the early stages of Alzheimer’s disease (Deweer et al., 1994). Repetition ... [more ▼]

Several studies have shown with the mirror reading paradigm that procedural learning and repetition priming might be preserved in the early stages of Alzheimer’s disease (Deweer et al., 1994). Repetition priming is demonstrated by the reading times improvement for repeated words, while procedural learning is demonstrated when this improvement is also observed for new words. Our hypothesis was that this improvement could be due to a repetition priming effect for the letters rather than to the learning of a mirror reading skill. Indeed, because the same letters are presented throughout the task, a repetition priming effect could be sufficient to explain the improvement of performance. In order to test this hypothesis, we have administered to 20 young and elderly subjects and to 20 Alzheimer’s patients a new mirror reading task including two phases: an acquisition phase comprising pseudo-words constructed with one part of the alphabet, and a test phase in which both pseudo-words constructed with the same part of the alphabet and pseudo-words constructed with another part of the alphabet were presented. Reading faster the new pseudo-words composed with the repeated letters would reflect a repetition priming effect, while reading faster pseudo-words composed with “new” letters would reflect a procedural learning effect. Results show comparable repetition priming effects in Alzheimer’s patients and in young and elderly subjects, whereas only young and elderly subjects showed a procedural learning effect. These results suggest, contrary to previous studies, that the learning of a new perceptual skill could be not preserved in Alzheimer’s disease. [less ▲]

Detailed reference viewed: 61 (2 ULg)
See detailPhosphorylation of huntingtin by cyclin dependent kinase 5.
Godin, Juliette ULg; Anne, Sandrine; Humbert, Sandrine

Poster (2008)

Detailed reference viewed: 4 (0 ULg)
See detailProtein synthesis and folding is a rate limiting step for bacterial growth at low temperatures.
Piette, Florence; D'Amico, Salvino; Leprince, Pierre ULg et al

Poster (2008)

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See detailHETEROGENEITY OF ZOOXANTHELLAE DENSITY IN THE CORAL ACROPORA GLOBICEPS AROUND MOOREA (FRENCH POLYNESIA)
Ladrière, Ophélie ULg; van Lierde, Elodie; Penin, Lucie et al

Poster (2008)

Understanding the natural heterogeneity of coral zooxanthellae density appears as very important to understand variations in coral survival due to bleaching (the loss of these micro-algal symbionts ... [more ▼]

Understanding the natural heterogeneity of coral zooxanthellae density appears as very important to understand variations in coral survival due to bleaching (the loss of these micro-algal symbionts). Heterogeneity of coral bleaching at different observation scales (within a colony, among neighbouring colonies of the same species or on a wider scale) remains largely misunderstood. The present work explores intracolonial, spatial and temporal variations of zooxanthellae density in the coral Acropora globiceps Dana 1846, over a period of three months on the forereef of Moorea, French Polynesia. In our study, intracolonial zooxanthellae densities did not vary significantly. However, zooxanthellae densities differed slightly between inner and outer branches but this trend was not significant at 6, 12 and 18 meters depth. On a wider scale, zooxanthellae densities also vary spatially : a positive correlation was observed between depth and symbiont density (density increases when light intensity decreases, so according to depth). Moreover, the location of colonies exposed to different hydrodynamical conditions was not a parameter controling the concentration of zooxanthellae. Finally, the temporal variation of zooxanthellae densities did not show significant variations even if it decreased slightly over the study period. The results of this study highlight the importance of accounting for variations within and among colonies to determine zooxanthellae densities and to assess the evolution of zooxanthellae populations. [less ▲]

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See detailRole of thiamine triphosphate and adenosine thiamine triphosphate in Escherichia coli
Gigliobianco, Tiziana ULg

Poster (2008)

Thiamine triphosphate (ThTP) is found in all organisms studied from bacteria to mammals. In E. coli, ThTP is accumulated as a result of amino acid starvation in the presence of a suitable carbon source ... [more ▼]

Thiamine triphosphate (ThTP) is found in all organisms studied from bacteria to mammals. In E. coli, ThTP is accumulated as a result of amino acid starvation in the presence of a suitable carbon source such as glucose, pyruvate and lactate. On the other hand, adenosine thiamine triphosphate (AThTP), that was recently discovered in E. coli, accumulates in the absence of a carbon source. While AThTP is synthesized in E. coli according to the reaction ThDP + ADP (ATP) ↔ AThTP + Pi (PPi) by a soluble high molecular mass nucleotidyl transferase, the mechanism of synthesis of ThTP remains unknown. Though both bacterial and mammalian adenylate kinases are able to catalyze ThTP synthesis at a very low rate in vitro, this reaction is not responsible for ThTP synthesis in vivo. AThTP is synthesized in E. coli incubated in minimal medium devoid of any carbon source. The addition of glucose leads to the immediate disappearance of AThTP and the appearance of ThTP. ThTP production is strongly impaired in the presence of protonophores, even when a high intracellular concentration of ATP is maintained through glycolysis. Our results suggest that ThTP accumulation requires a high protonmotive force rather than a high intracellular ATP concentration. On the other hand, AThTP is synthesized under conditions of limited energy availability, either in the absence of a carbon source or in the presence of a carbon source and metabolic inhibitors or uncouplers. Interestingly, ThTP and AThTP never accumulate simultaneously in high amounts. Our results suggest that in E. coli both compounds might therefore act as specific “alarmones”, responding to different conditions of cellular stress. [less ▲]

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See detailReintroduction & effects on their environment of indigenous plants of the Cerrado
Buisson, Elise; Le Stradic, Soizig ULg; Negreiros, Daniel et al

Poster (2008)

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See detailProduction of alarm pheromone by developing aphids varies in response to their social environment
Verheggen, François ULg; Haubruge, Eric ULg; Demoraes, Consuelo et al

Poster (2008)

Aphid alarm pheromone—the volatile sesquiterpene (E)-β-farnesene (Eβf) in most species—is released in response to predation and other stresses and typically causes nearby aphids who receive the signal to ... [more ▼]

Aphid alarm pheromone—the volatile sesquiterpene (E)-β-farnesene (Eβf) in most species—is released in response to predation and other stresses and typically causes nearby aphids who receive the signal to cease feeding, drop from their host plant, and disperse. Because aphid alarm pheromone confers apparent fitness benefits on recipients while its production and release likely entail costs for the emitting aphid, it could be adaptive for aphids to regulate their Eβf production in response to variation in the social environment. To explore this possibility we compared the production of Eβf by Acyrthosiphon pisum (Harris) individuals reared from first-instar larvae to the adult stage in isolation to that of individuals reared among conspecifics or among individuals of a different aphid species, Myzus persicae (Sulzer). Levels of EβF produced in each treatment were assayed by GC-FID quantification of EβF in volatiles collected from crushed aphids. Production of EβF by A. pisum reared in isolation (14.4ng/aphid) was significantly lower than that of aphids reared in a colony of conspecifics (49.1ng/aphid), reared in a M. persicae colony (31.5ng/aphid) or reared among conspecifics of another aaphid clone (52.7ng/aphid). Though A. pisum individuals in our experiments produced less EβF when reared among M. persicae than among conspecifics, this difference was not statistically significant. In a separate experiment we reared A. pisum individuals in isolation and exposed them to the odor of conspecifics. Under these conditions, EβF production was similar to that of aphids reared among conspecifics, suggesting that aphids use volatile cues to assess their social environment and regulate their production of alarm pheromone accordingly. [less ▲]

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See detailA new method for absolute quantification of allergens in food: the "Heavy Peptides method".
Fourdrilis, Séverine; Bourgeon, Cédric; Kirsch, Stéphanie ULg et al

Poster (2008)

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See detailEffect of temperature increase on the courtship behavior and the fitness in the Palmate newt
Galloy, Valérie ULg; Lo Presti, Wendy; Denoël, Mathieu ULg

Poster (2008)

A trend in global warming is now undeniable. Increases of global temperatures have resulted in measurable shifts in the distribution, phenology and survival of some plant and animal species. However, the ... [more ▼]

A trend in global warming is now undeniable. Increases of global temperatures have resulted in measurable shifts in the distribution, phenology and survival of some plant and animal species. However, the mechanisms showing the link between global warming and declines remain unclear. The aim of this study was to examine whether courtship displays and fitness could be affected by a temperature increase. To this end, we compared the sexual behavior and egg-laying traits at naturally occurring temperatures (14 C, 18 C and 22 C) in palmate newts (Triturus helveticus). First, our results underline the importance of female role in the male courtships. The majority of male behaviors are affected by the female responsiveness, which is temperature dependent. They also show that water temperature increase has a negative effect on the fecundity of female newts. Females lay half as many eggs at high temperatures as they do at low temperatures and of these only one third hatch. The demonstration of such a detrimental effect shows that more experimental studies are required to understand the proximate mechanisms of global warming. [less ▲]

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See detailAnti-inflammatory properties of stigmasterol in cartilage: new insights
Gabay, Odile; Sanchez, Christelle ULg; Chevy, F. et al

Poster (2008)

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See detailImplementation of health aspects (ER N°3) in the Construction Products; Directive (CPD) regarding emissions to indoor air
Lor, Marc; Vause, Kevin; Goelen, Eddy et al

Poster (2008)

Standardisation work on test methods for dangerous substances released in the indoor air by construction products is currently ongoing at European level. The paper presents a study conducted in Belgium ... [more ▼]

Standardisation work on test methods for dangerous substances released in the indoor air by construction products is currently ongoing at European level. The paper presents a study conducted in Belgium, which compares methods in three different test chambers and aiming at assessing the performance of the products placed on the market. [less ▲]

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See detailL’apprentissage procédural chez le jeune enfant : présentation d’un nouvel outil d’évaluation
Lejeune, Caroline ULg; Delcourt, Isabelle; Meulemans, Thierry ULg

Poster (2008)

The authors generally agree that procedural learning abilities play an important role in the child development and that they are present early in childhood. However, few studies have been carried out in ... [more ▼]

The authors generally agree that procedural learning abilities play an important role in the child development and that they are present early in childhood. However, few studies have been carried out in this area because of the difficulty to develop tests specifically designed for the evaluation of these capacities in young children. In this study, we presented a new task aimed to evaluate visuo-motor skill learning in the young child. The purpose of the present study was to explore whether procedural learning abilities are present in the same extent in 4-year as 7- and 10-year-old children. Our sample is composed of 60 children divided into 3 age-groups. The task is composed of 5 blocks of 12 trials during which each subject has to use a reversed mouse of a computer in order to “catch” different toys appearing on the screen; 2 blocks of 12 trials was administered after a 15 minutes delay. Our results show an important difference between the groups for the first block; on the other hand, for the next blocks, the results show an absence of age-related difference between participants in our perceptive-motor skill learning task, confirming the idea according to which procedural learning abilities are efficient early in development (the difference observed during the first block being probably due to the intervention of executive mechanisms). [less ▲]

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See detailThe cold-adapted trigger factor from the Antarctic bacterium Pseudoalteromonas haloplanktis.
D'Amico, Salvino; Piette, Florence; Leprince, Pierre ULg et al

Poster (2008)

Detailed reference viewed: 5 (0 ULg)
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See detailLeaves of Bigaradier (Citrus aurantium) dried by micro-onde for the storage
Dahak, K.; Wathelet, Jean-Paul ULg; Chechounai, H. et al

Poster (2008)

In this paper, our goal is to develop methods to choose the good drying and storage processes for medicinal and aromatic plants. We project the study of the kinetics of drying of the leaves of Bigaradier ... [more ▼]

In this paper, our goal is to develop methods to choose the good drying and storage processes for medicinal and aromatic plants. We project the study of the kinetics of drying of the leaves of Bigaradier. This Mediterranean plant is known by its therapeutic properties. [less ▲]

Detailed reference viewed: 28 (1 ULg)
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See detailComparison of T1 and T2 - weighted and Blade MRI sequences for examination of canine normal abdomen
Hoffmann; Buttin; Haye et al

Poster (2008)

Detailed reference viewed: 54 (1 ULg)
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See detailSynthèse de nouveaux surfactants dérivés des acides D-glucuronique et D-galacturonique.
Laurent, Pascal ULg; Richel, Aurore ULg; Richard, Gaetan ULg et al

Poster (2008)

A l'heure actuelle, le bioraffinage se présente de plus en plus comme une alternative prometteuse aux filières pétrochimiques puisqu'il vise à la fois le remplacement d'une partie du pétrole comme source ... [more ▼]

A l'heure actuelle, le bioraffinage se présente de plus en plus comme une alternative prometteuse aux filières pétrochimiques puisqu'il vise à la fois le remplacement d'une partie du pétrole comme source d'énergie et le développement de produits chimiques issus de la biomasse (végétale principalement) tels que détergents, produits phytopharmaceutiques, dissolvants, matières plastiques, etc. La valorisation de carbohydrates provenant de matières premières renouvelables [1] fait ainsi actuellement l'objet de nombreuses recherches. Dans ce cadre, la synthèse de nouveaux tensioactifs non ioniques dérivés des acides Dglucuronique et D-galacturonique a été effectuée de manière chimique et/ou enzymatique. [less ▲]

Detailed reference viewed: 72 (10 ULg)
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See detailThe influence of affective valence on false recall in the DRM procedure.
Dehon, Hedwige ULg; Laroi, Frank ULg; Van der Linden, Martial

Poster (2008)

Detailed reference viewed: 6 (0 ULg)
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See detailAnalyse des lipides polaires de la MFGM par SPE et HPLC-ELSD
Bodson, P.; Danthine, Sabine ULg; Blecker, Christophe ULg et al

Poster (2008)

Detailed reference viewed: 20 (5 ULg)
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See detailFast mapping between grammatical constructions and meaning Two experiments in French children aged 3 to 4
Maillart, Christelle ULg; Parisse, Christophe; Dupont, Fanny et al

Poster (2008)

Detailed reference viewed: 36 (6 ULg)
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See detailThe influence of affective valence on false recognition in the DRM procedure.
Dehon, Hedwige ULg; Laroi, Frank ULg; Van der Linden, Martial

Poster (2008)

Detailed reference viewed: 3 (0 ULg)
See detailKarst in het krijt van Limburg en ombeving
Lagrou, David; Dusart; Willems, Luc ULg

Poster (2008)

Detailed reference viewed: 22 (0 ULg)