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See detailLe passé à travers le prise du présent
Grandjean, Geoffrey ULg

Article for general public (2015)

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See detailAnalyse du déterminisme génétique de l’inhibition de la synthèse du gossypol dans la graine chez la descendance de l’hybride [(Gossypium hirsutum L. x G. raimondii Ulb.)² x G. sturtianum Willis]
Diouf, Fatimata Bintou Hassédine ULg

Doctoral thesis (2015)

Several analyses were performed in advanced generations of HRS [(Gossypium hirsutum x G. raimondii) ² x G. sturtianum] hybrid. These were obtained by backcrossing and selfing HRS plants expressing the ... [more ▼]

Several analyses were performed in advanced generations of HRS [(Gossypium hirsutum x G. raimondii) ² x G. sturtianum] hybrid. These were obtained by backcrossing and selfing HRS plants expressing the glanded-plant and glandless-seed trait of G. sturtianum. The purpose is to understand why it is not possible to fix this target character in the HRS progeny. Thus, HRS BC2S5, BC2S6, BC2S7, BC3S4, ♂BC4S3, ♂BC4S4, ♀BC4S3 and ♀BC4S4 plant populations were studied. Agro-morphological observations carried out on the studied plant material showed in all analyzed progenies significant fertility problems as manifested by high rates of embryo abortion, poor germination of seeds and premature mortality of many seedlings. Moreover, major phenotypic differences were observed between the HRS plants and upland cotton. Genomic in situ hybridization analysis (GISH) demonstrated that the magnitude of these problems is related to the importance of the presence of genetic material of the Australian species in HRS hybrids. The analysis of the plant material with the 10 SSRs markers, mapped on c2-c14, c3-c17, and c6-c25 linkage groups of G. hirsutum, points out very important segregation distortions (SD). Genotypic profiles were almost always heterozygous. These SD are caused by gametic and/or zygotic selections that occur respectively before and/or after fertilization. GISH showed the presence of one (1) to four (4) whole G. sturtianum chromosomes and one to two large fragments of G. sturtianum chromosomes. This structural heterozygosity is implicated in the SD observed. However, the massive presence of alien genetic material hardly affected the chromosome pairing and pollen fertility of the analyzed hybrid plants. This is contradictory to the observed SD and suggests a certain genetic balance in the analysed hybrids. It thus indicates no, or very weak interaction between the chromosomes of G. sturtianum and those of G. hirsutum into the genome of HRS derivatives. The expression of the desired character is very complex, but it is certain that: (i) the factors responsible for the desired trait are better transmitted through the ovule than the pollen, (ii) the alleles involved in the expression of the target trait operate both according to the additive and epistatic models, (iii) the increase of the G. hirsutum genetics background in the most advanced generations of the HRS hybrid is accompanied by a decrease of the expression of the desired trait, (iv) seeds viability problems affect both seeds with or without gossypol glands, whether they are well formed or malformed, showing the independence between at least a part of the imbalance factors and those related to the expression of researched character. Several G. sturtianum genes appear to be involved in the control of the target trait. However, the strong SD that characterizes the analyzed plants questions the reliability of this result obtained through single-marker analysis. A resumption of the breeding program using agro-morphological characterization tools, SSR and GISH, in the early generations of backcrossing, should help to better guide the selection program towards obtaining stable plants that express the character. [less ▲]

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See detailCorporate Board Attributes and CAC: A Comparative Study of France, Germany and UK
Boussaid, Nabila ULg; Hamza, Taher; Sougné, Danielle ULg

Conference (2015, September 14)

This paper investigates the impact of corporate board of directors’ attributes on conditional accounting conservatim in the French, German and British contexts. Using pooled regression model over the ... [more ▼]

This paper investigates the impact of corporate board of directors’ attributes on conditional accounting conservatim in the French, German and British contexts. Using pooled regression model over the period 2009-2012, our findings report that the relationship between corporate board attributes and accounting conservatism is country dependent. First, regarding the board composition, we find that the effect of board size is positive for German firms, negative for French firms and insignificant for British firms. We also document a positive association between board independence and accounting conservatism for British firms. However, we find no evidence of a positive association between codetermination and earnings conservatism in German context. Second, female seats on board seem to increase conservative reporting in financial statement only for French firms. Lastly, board meeting frequency in French and British firms appears to increase accounting conservatism. As a robustness test, we use an alternative measure of accounting conservatism namely, time–series of earnings changes measure and confirm the previous results. Overall, our results reveal that corporate board affects the financial reporting quality. [less ▲]

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See detailSharing in neuroimaging: collecting with Brainmap, quantitatively analysing and sharing with ANIMA
Genon, Sarah ULg; Reid, Andrew; Eickhoff, Simon

Conference (2015, September 14)

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See detailThe Red Marble of Baelen, an exceptional mid-Famennian mud mound complex in a carbonate ramp setting from Eastern Belgium
Dreesen, Roland; Vachard, Daniel; Marion, Jean-Marc ULg et al

Poster (2015, September 14)

The Red Marble of Baelen from the Limbourg area (Vesdre Basin, Eastern Belgium) represents a member of the middle Famennian (late Upper Devonian) Souverain-Pré Formation (Late marginifera conodont Zone ... [more ▼]

The Red Marble of Baelen from the Limbourg area (Vesdre Basin, Eastern Belgium) represents a member of the middle Famennian (late Upper Devonian) Souverain-Pré Formation (Late marginifera conodont Zone). It corresponds to a short-term transgressive event and eustatic rise during the Famennian, interrupting the regressive megasequence on the Condroz shelf in Belgium. It is the only known or at least the only well-documented mid-Famennian carbonate mud mound complex worldwide, after the end-Frasnian mass extinction that wiped out numerous invertebrate taxa. [less ▲]

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See detailPt-Ni Hollow Nanoparticles for Oxygen Reduction Reaction : Controlling the Nanoparticle Morphology
Asset, Tristan ULg; Zubiaur, Anthony ULg; Chattot, Raphael et al

Poster (2015, September 13)

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See detailBande dessinée et "sonorités graphiques"
Dejasse, Erwin ULg

Conference given outside the academic context (2015)

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See detailL'abstraction dans les bandes dessinées d'Ephameron et d'Olivier Schrauwen
Crucifix, Benoît ULg; Meesters, Gert

Conference given outside the academic context (2015)

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See detail18FDG-PET/CT IMAGING IN SUSPECTED ACUTE RENAL ALLOGRAFT REJECTION
LOVINFOSSE, Pierre ULg; WEEKERS, Laurent ULg; BOVY, Christophe ULg et al

Conference (2015, September 13)

The diagnosis procedure for kidney transplant recipients (KTR) with suspected acute rejection (AR) relies on needle biopsy. Noninvasive tests to predict nonrejection would be preferable. AR is associated ... [more ▼]

The diagnosis procedure for kidney transplant recipients (KTR) with suspected acute rejection (AR) relies on needle biopsy. Noninvasive tests to predict nonrejection would be preferable. AR is associated with a recruitment of activated leukocytes into the transplant, which are characterized by a high metabolic activity and an increased uptake of glucose analog, Fluoro-deoxyglucose ( FDG). Thus, FDG-Positron emission tomography coupled with computed tomography (PET/CT) may help noninvasively distinguish nonrejection from AR. From January 2013 to February 2015, we prospectively performed 32 FDGPET/ CT in 31 adult KTR with suspected renal AR who underwent a biopsy. Biopsies were categorized as “normal”, “borderline”, “AR” or “others” according to Banff classification. PET/CT imaging was performed within 201 ± 18 minutes after i.v. administration of 3.2 ± 0.2 MBq/kg of FDG, before any modification of immunosuppression. The mean standard uptake values (SUV) of both upper and lower renal poles were measured, with no threshold activity. Biopsies were diagnosed as “normal”, “borderline”, “AR” or “others” in 8, 10, 8 and 6 (including 3 polyoma-BK nephropathies) cases. Mean SUV respectively reached 1.5 ± 0.2, 1.6 ± 0.3, 2.9 ± 0.8, 2.2 ± 1.2 in each category. Mean SUV of biopsy-proven AR was significantly higher than “normal” cases (p<0.01). No difference was found between “normal” vs. “borderline”, or between “AR” vs. “others” histopathology. Still, a positive correlation between mean SUV and acute composite (g+i+t+v+ptc) Banff score was found, with a coefficient of 0.70 (p<0.001). Sensitivity and specificity of FDG-PET/CT in detecting pathological biospies were respectively 92.3% and 36.8%, with a mean SUV threshold at 1.4. FDG-PET/CT imaging may help discriminate nonrejection, thereby avoiding unnecessary transplant biopsy in KTR with suspected AR. [less ▲]

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See detailOccurrence and risk indicators of medication-related osteonecrosis of the jaw after dental extraction: a systematic review and meta-analysis.
GAUDIN, Elise ULg; SEIDEL, Laurence ULg; Bacevic, Miljana ULg et al

in Journal of Clinical Periodontology (2015)

AIMS: The primary objective was to assess the occurrence rate of Medication-Related OsteoNecrosis of the Jaw (MRONJ) after dental extraction in patients treated with Anti-Resorptive Drugs (ARD) for ... [more ▼]

AIMS: The primary objective was to assess the occurrence rate of Medication-Related OsteoNecrosis of the Jaw (MRONJ) after dental extraction in patients treated with Anti-Resorptive Drugs (ARD) for OsteoPorosis (OP) or for oncological reasons. The secondary objective was to compare the extraction techniques regarding the occurrence of MRONJ. MATERIALS AND METHODS: A systematic search in PubMed/MEDLINE, EMBASE and LILACS databases was performed. Prospective studies considering human patients treated with ARD and providing information regarding the occurrence of MRONJ after dental extraction were selected. Meta-analysis for incidence of MRONJ at the patient level was performed. The effect of administration route and surgical technique on MRONJ was evaluated. RESULTS: The risk of MRONJ after dental extraction was significantly higher in patients treated with ARD for oncological reasons (3.2%) than in those treated with per os ARD for OP (0.15%) (p<0.0001). Dental extraction performed with adjusted extraction protocols decreased significantly MRONJ development. Potential risk indicators such as concomitant medications and pre-existing osteomyelitis were identified. CONCLUSION: The risk of MRONJ after dental extraction in patients treated with ARD exists, especially in patients treated for oncologic reasons. This risk tends to decrease with adjusted extraction protocols. This article is protected by copyright. All rights reserved. [less ▲]

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See detailCHEMOKINE (CC-MOTIF) LIGAND 2 AS A PROGNOSTIC SERUM MARKER IN CANINE IDIOPATHIC PULMONARY FIBROSIS
Roels, Elodie ULg; Holopainen, S.; Teske, Erik ULg et al

Poster (2015, September 11)

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See detailL'utilisation des insectes dans la pharmacopée de l'Égypte gréco-romaine
Marganne, Marie-Hélène ULg

Conference (2015, September 11)

Telles qu'on peut les déchiffrer dans les papyrus littéraires grecs retrouvés en Égypte (IV/IIIe siècles avant notre ère – VI/VIIe siècles de notre ère), les prescriptions médicales recourent-elles à des ... [more ▼]

Telles qu'on peut les déchiffrer dans les papyrus littéraires grecs retrouvés en Égypte (IV/IIIe siècles avant notre ère – VI/VIIe siècles de notre ère), les prescriptions médicales recourent-elles à des insectes et, si tel est le cas, à quelle(s) variété(s), en raison de quelle(s) propriété(s) et pour quel(s) type(s) d'affections ? C'est à ces questions que l'on tentera de répondre, en complétant le témoignage des sources papyrologiques par celui des sources littéraires grecques et latines sur la pharmacopée de l'Égypte gréco-romaine. [less ▲]

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See detailWill Big Data Deliver its Promised Productivity Growth?
Artige, Lionel ULg

Conference (2015, September 11)

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Peer Reviewed
See detailPredator cues and risky habitats affect foraging activity in salamanders
Melotto, Andrea; Ficetola, Gentile Francesco; Denoël, Mathieu ULg et al

Conference (2015, September 11)

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See detailIntercalation of imidazolium end-functionalized polyphosphates between montmorillonite nanosheets towards flame-retardant
Carion, Stéphan ULg; Lecomte, Philippe ULg; Thomassin, Jean-Michel ULg et al

Poster (2015, September 11)

Among the additives used to impart flame-retardant properties to polymer materials, phosphorous additives and nanoclays are widely used. The aim of this work is to associate both additives to bring about ... [more ▼]

Among the additives used to impart flame-retardant properties to polymer materials, phosphorous additives and nanoclays are widely used. The aim of this work is to associate both additives to bring about a synergetic effect for improving the flame-retardancy of the material (1). In a first step, the synthesis of an aliphatic polyphosphate end-capped by an imidazolium cation is reported. Secondly, this polymer is intercalated between montmorillonite nanoclays. The strategy used for the synthesis of the polyphosphate is based on the ring-opening polymerization of the corresponding cyclic phosphate by using 1-(11-hydroxy-undecyl)-3-methylimidazolium bromide as an initiator. This polymerization was catalyzed by DBU and a thiourea derivative (2). This polymer was characterized by a set of techniques (31P and 1H NMR, SEC, TGA, DSC). Finally, the cationic end-functionalized polymer was exchanged with sodium cations present in montmorillonite. The intercalation of the polyphosphate between the clay nanosheets was proved by X-Ray Diffraction (XRD) and thermogravimetric analysis (TGA). This last technique was also used to determine the influence of the intercalation on the thermal stability of the polyphosphate. [less ▲]

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