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See detailLe mélèze, un résineux à (re) découvrir
Rondeux, Jacques ULg

in Forêt Wallonne (2002), (61), 3

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See detailLe mélèze, une essence à haut potentiel de production
Pauwels, Dominique; Rondeux, Jacques ULg

in Silva Belgica (2000), 107(3), 6-10

Dans un précédent article "le mélèze, un atout dans les objectifs de diversification de notre sylviculture" (PAUWELS et RONDEUX, 2000), nous nous sommes efforcés de montrer que la culture du mélèze ... [more ▼]

Dans un précédent article "le mélèze, un atout dans les objectifs de diversification de notre sylviculture" (PAUWELS et RONDEUX, 2000), nous nous sommes efforcés de montrer que la culture du mélèze méritait, à plusieurs égards, d'être davantage prise en compte en Région wallonne et ce, pour autant qu'une sylviculture adaptée à l'essence et aux conditions du milieu soit appliquée. Les lignes qui suivent sont consacrées à des résultats originaux résultant d'une étude menée par l'Unité de Gestion et Economie forestières de la Faculté universitaire des Sciences agronomiques de Gembloux, sur la croissance des mélèzes en Région wallonne. Le potentiel de croissance du mélèze a été évalué à partir d'analyses de tiges ou de mesures réalisées au sein de placettes de production (figure 1) remesurées tous les 3 ans. A partir d'une exploitation appropriée de ces données, on a déduit une gamme de traitements sylvicoles capables de rencontrer les objectifs de production que l'essence permet d'atteindre. [less ▲]

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See detailLes mélèzes
Rondeux, Jacques ULg; Pauwels, D.

in Fiche technique (2001)

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See detailLes mélèzes, un nouveau défi pour la sylviculture des résineux en Wallonie
Rondeux, Jacques ULg

Book (2003)

The larch is a really worth considering species in the walloon region especially in forests from which sustained management and multi-functional aspects are sought. Because of its rapid growth rate, its ... [more ▼]

The larch is a really worth considering species in the walloon region especially in forests from which sustained management and multi-functional aspects are sought. Because of its rapid growth rate, its wood of high quality and its environmental effects (landscape) as well as its ecological impact (biodiversity enhancement, wildlife habitat improvement) larch has to pay a role in the achievement of most management purposes. However its silviculture in terms of method, severity and timing of thinning is not sufficiently related to its ecology and its high juvenile growth. Among the three larch species the hybrid larch is quite promising but adequate silviculture has to be applied during the course of its development. The present paper gives some guidelines for constructing silvicultural scenarios able to ensure economic returns and a proper balance between the non marketed forms of production like aesthetic value, biodiversity, game and recreation. [less ▲]

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See detailMellery : un petit village si tranquille
Durand, Pascal ULg

Article for general public (1997)

Compte rendu de l'ouvrage de Catherine Fallon et Philippe Lamotte, Une réaction citoyenne. Les leçons d'un comité d'action à Mellery, Bruxelles, Luc Pire, 1997

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See detailMelt-Granulation with a new laboratory high-shear mixer
Evrard, Brigitte ULg; Delattre, Luc ULg

in Proceedings of 6th International Conference of Pharmaceutical Technology (1992)

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See detailMelting and crystallisation behaviour of multi-component Fe-C-Cr-X alloys : microstructural aspects
Tchuindjang, Jérôme Tchoufack ULg; Lecomte-Beckers, Jacqueline ULg

in Proceedings of the 13th European Microscopy Congress (2004)

Studied materials are of the Fe-C-Cr-X multi-component system where X represents a group of strong carbides formers as Mo, V, or Nb. These alloys are used for wear components. Differential Thermal ... [more ▼]

Studied materials are of the Fe-C-Cr-X multi-component system where X represents a group of strong carbides formers as Mo, V, or Nb. These alloys are used for wear components. Differential Thermal Analysis (DTA) was used to determine the melting and solidification behaviour of these materials. Raw material has a thermomecanical history that involved casting, heat treating and hot forming, which could be investigated by the melting sequence of the DTA trial. [less ▲]

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See detailMelting and crystallization of poly(vinylidene fluoride) blended with polyamide 6
Liu, Zhehui; Maréchal, Philippe; Jérôme, Robert ULg

in Polymer (1997), 38(20), 5149-5153

Melting and crystallization of poly(vinylidene fluoride) (PVDF) blended with polyamide 6 (PA6) has been studied by differential scanning calorimetry. The melting of PVDF and PA6 is observed over a small ... [more ▼]

Melting and crystallization of poly(vinylidene fluoride) (PVDF) blended with polyamide 6 (PA6) has been studied by differential scanning calorimetry. The melting of PVDF and PA6 is observed over a small temperature range, i.e. 174 to 181 degrees C and 220 to 230 degrees C, respectively, over the whole blend composition. This observation indicates that PVDF and PA6 are immiscible and do not co-crystallize, although evidence for intermolecular interactions between PVDF and PA6 has been previously reported. Crystallinity of PVDF seems to decrease on addition of the first 30 wt% PA6, although this effect is not so different from the experimental errors. Kinetics of non-isothermal crystallization of pure PVDF and PVDF blends containing 20 and 40 wt% PA6 has been investigated. The crystallization rate of PVDF is not influenced by PA6 in the temperature range 138.5-145 degrees C. At lower temperatures, it is, however, adversely affected by addition of PA6. The non-isothermal crystallization data for PVDF are fitted by the Ozawa equation in the temperature range 131-141 degrees C. The Ozawa index, or Avrami exponent, for pure PVDF decreases from 3 to 1 on decreasing temperature. This observation agrees with the nucleation of PVDF crystals which is heterogeneous, and a decrease from 3 to 1 in the growth dimension. The main effect of PA6 is to restrict the decrease of the Avrami exponent from 3 to 2 on decreasing temperature, more likely due to a slower decrease in the growth dimension. PA6 does not contribute to nucleation although it is phase separated. [less ▲]

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See detailMelting and polymorphic behavior of binary blends made of palm oil or its fractions and other fats.
Danthine, Sabine ULg; deroanne, claude

Poster (2006, October)

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See detailMelting of a confined monolayer of magnetized beads
Schockmel, Julien ULg; Mersch, Eric; Vandewalle, Nicolas ULg et al

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2013)

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See detailMelting trends over the Greenland ice sheet (1958–2009) from spaceborne microwave data and regional climate models
Fettweis, Xavier ULg; Tedesco, Marco; van den Broeke, Michiel et al

in The Cryosphere [=TC] (2011), 5

To study near-surface melt changes over the Greenland ice sheet (GrIS) since 1979, melt extent estimates from two regional climate models were compared with those obtained from spaceborne microwave ... [more ▼]

To study near-surface melt changes over the Greenland ice sheet (GrIS) since 1979, melt extent estimates from two regional climate models were compared with those obtained from spaceborne microwave brightness temperatures using two different remote sensing algorithms. The results from the two models were consistent with those obtained with the remote sensing algorithms at both daily and yearly time scales, encouraging the use of the models for analyzing melting trends before the satellite era (1958–1979), when forcing data is available. Differences between satellite-derived and model-simulated results still occur and are used here to identify (i) biases in the snow models (notably in the albedo parametrization, in the thickness of a snow layer, in the maximum liquid water content within the snowpack and in the snowfall impacting the bare ice appearance in summer) and (ii) limitations in the use of passive microwave data for snowmelt detection at the edge of the ice sheet due to mixed pixel effect (e.g., tundra or rock nearby the ice sheet). The results from models and spaceborne microwave sensors confirm a significant (p-value = 0.01) increase in GrIS surface melting since 1979. The melt extent recorded over the last years (1998, 2003, 2005 and 2007) is unprecedented in the last 50 yr with the cumulated melt area in the 2000's being, on the average, twice that of the 1980's. [less ▲]

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See detailMélusine et ses antécédents antiques
Pirenne-Delforge, Vinciane ULg

in Actes du XXIXe Congrès de l’Association des Professeurs de Langues Ancienens de l’Enseignement Supérieur (Montpellier, 31 mai - 1er juin 1996) (1997)

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See detailMemantine-induced brain activation as a model for the rapid screening of potential novel antipsychotic compounds: Exemplified by an mGlu2/3 receptor agonist
Dedeurwaerdere, S.; Wintmolders, C.; Straetemans, R. et al

in Society-for-Neuroscience Abstracts/Annual Meeting Publications (2010, November 17), 40

Schizophrenia is a severe, disabling chronic disorder affecting approximately 1% of the population. Unfortunately, patients afflicted by this difficult to treat psychiatric illness remain stigmatized and ... [more ▼]

Schizophrenia is a severe, disabling chronic disorder affecting approximately 1% of the population. Unfortunately, patients afflicted by this difficult to treat psychiatric illness remain stigmatized and are likely to suffer permanent cognitive and social deficits. Improvements and development of more robust and hopefully predictive screening assays for this disease should enhance the identification and development of novel treatments. The present study describes a rapid and robust method for the testing of potential novel antipsychotics by utilising a simplified [14C]2-deoxyglucose (2-DG) uptake autoradiography technique following memantine-induced brain activation. Male C57BL/6JCRL mice were treated with either vehicle, ketamine (30 mg/kg, s.c.) or memantine (20 mg/kg, s.c.). Both NMDA antagonists induced significant increases in 2-DG uptake in specific brain region such as lateral orbital cortex, olfactory tubercle, piriform cortex, cingulate cortex, retrosplenial cortex, lacunosum molecular layer of the hippocampus and the lateral posterior thalamic nucleus. Interestingly, memantine elicited a more robust brain activation signature with a larger dynamic window than ketamine. For further characterisation of the assay, we also tested the effect of diet (fasting versus non-fasting) and different vehicles. In addition, dedicated software, developed particularly for this assay, was evaluated for automated quantification of the brain sections. In subsequent reversal studies, we found that in accordance to the ketamine challenge model (Duncan et al. 1998), the “atypical” anti-psychotic clozapine (2.5 and 10 mg/kg, s.c.) significantly reversed memantine-induced 2-DG uptake whilst the “typical” anti-psychotic haloperidol (0.32 mg/kg, s.c.) was inactive thus further validating our choice of memantine for the challenge agent. An additional study then determined the effects of a mGlu2/3 receptor agonist on both ketamine and memantine-induced brain activation. Pre-treatment with LY404039 (10 mg/kg, s.c.) fully reversed both the ketamine and memantine-induced increase in 2-DG uptake without effects on basal 2-DG uptake. Finally, a small animal PET study was performed with [18F]-FDG in mice and rats investigating the effect of memantine (20 mg/kg) administration in vivo. This study confirmed the memantine-induced brain activation previously demonstrated by autoradiography. In conclusion, this novel pre-clinical method shows potential for the screening of compounds targeting the NMDA receptor hypofunction hypothesis of schizophrenia and may assist in translating these findings from the bench to clinic. [less ▲]

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See detailMembrane associated proteases and their inhibitors in tumour angiogenesis
Noël, Agnès ULg; Maillard, Catherine ULg; Rocks, Natacha ULg et al

in Journal of Clinical Pathology (2004), 57(6), 577-584

Cell surface proteolysis is an important mechanism for generating biologically active proteins that mediate a range of cellular functions and contribute to biological processes such as angiogenesis ... [more ▼]

Cell surface proteolysis is an important mechanism for generating biologically active proteins that mediate a range of cellular functions and contribute to biological processes such as angiogenesis. Although most studies have focused on the plasminogen system and matrix metalloproteinases ( MMPs), recently there has been an increase in the identification of membrane associated proteases, including serine proteases, ADAMs, and membrane-type MMPs (MT-MMPs). Normally, protease activity is tightly controlled by tissue inhibitors of MMPs (TIMPs) and plasminogen activator inhibitors (PAIs). The balance between active proteases and inhibitors is thought to determine the occurrence of proteolysis in vivo. High concentrations of proteolytic system components correlate with poor prognosis in many cancers. Paradoxically, high (not low) PAI-1 or TIMP concentrations predict poor survival in patients with various cancers. Recent observations indicate a much more complex role for protease inhibitors in tumour progression and angiogenesis than initially expected. As knowledge in the field of protease biology has improved, the unforeseen complexities of cell associated enzymes and their interaction with physiological inhibitors have emerged, often revealing unexpected mechanisms of action. [less ▲]

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See detailMembrane associated thiamin phosphatases in the electric organ of E. electricus
Michel-Cahay, C; Bettendorff, Lucien ULg; De Rycker, C et al

in Archives Internationales de Physiologie et de Biochimie (1985), 93

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See detailMembrane associated thiamine phosphatases in the electric organ of Electrophorus electricus
Michel-Cahay, C; Bettendorff, Lucien ULg; De Rycker, C et al

Poster (1985, September 03)

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See detailMembrane Destabilization Induced By Beta-Amyloid Peptide 29-42: Importance Of The Amino-Terminus
Mingeot-Leclercq, Mp.; Lins, Laurence ULg; Bensliman, M. et al

in Chemistry and Physics of Lipids (2002), 120(1-2), 57-74

Increasing evidence implicates interactions between Abeta-peptides and membrane lipids in Alzheimer's disease. To gain insight into the potential role of the free amino group of the N-terminus of Abeta29 ... [more ▼]

Increasing evidence implicates interactions between Abeta-peptides and membrane lipids in Alzheimer's disease. To gain insight into the potential role of the free amino group of the N-terminus of Abeta29-42 fragment in these processes, we have investigated the ability of Abeta29-42 unprotected and Abeta29-42 N-protected to interact with negatively-charged liposomes and have calculated the interaction with membrane lipids by conformational analysis. Using vesicles mimicking the composition of neuronal membranes, we show that both peptides have a similar capacity to induce membrane fusion and permeabilization. The fusogenic effect is related to the appearance of non-bilayer structures where isotropic motions occur as shown by 31P and 2H NMR studies. The molecular modeling calculations confirm the experimental observations and suggest that lipid destabilization could be due to the ability of both peptides to adopt metastable positions in the presence of lipids. In conclusion, the presence of a free or protected (acetylated) amino group in the N-terminus of Abeta29-42 is therefore probably not crucial for destabilizing properties of the C-terminal fragment of Abeta peptides. [less ▲]

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