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See detailImpact of the spray drying conditions on inulin's physical properties
Ronkart, Sébastien; Blecker, Christophe ULiege; Deroanne, Claude et al

Poster (2008, July)

Detailed reference viewed: 27 (8 ULiège)
See detailImpact of the Structure of Biocompatible Aliphatic Polycarbonate on siRNA Transfection Ability
Frère, Antoine ULiege; Kawalec, Michal; Tempelaar, Sarah et al

Poster (2014, May 26)

Detailed reference viewed: 58 (22 ULiège)
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See detailImpact of the Structure of Biocompatible Aliphatic Polycarbonates on siRNA Transfection Ability
Frère, Antoine ULiege; Kawalec, Michal; Tempelaar, Sarah et al

in Biomacromolecules (2015)

RNAi therapeutics are promising therapeutic tools that have sparked the interest of many researchers. In an effort to provide a safe alternative to PEI, we have designed a series of new guanidinium and/or ... [more ▼]

RNAi therapeutics are promising therapeutic tools that have sparked the interest of many researchers. In an effort to provide a safe alternative to PEI, we have designed a series of new guanidinium and/or morpholino functionalized biocompatible and biodegradable polycarbonate vectors. The impact of different functions (morpholino-, guanidinium-, hydrophobic groups), of the architecture (linear homopolymer to dumbbell-shape) and of the molecular weight of these copolymers on their capacity to form polyplexes and to decrease the expression of two epigenetic regulators of gene expression, HDAC7 and HDAC5 was evaluated. The use of one of these polymers combining morpholine and guanidine functions at the ratio >1 and hydrophobic trimethylene carbonate groups showed a significant decrease of mRNA and protein level in HeLa cells, similar to PEI. These results highlight the potential of polycarbonate vectors for future in vivo application as an anti-cancer therapy. [less ▲]

Detailed reference viewed: 123 (31 ULiège)
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See detailIMPACT OF THE TEMPERAMENT OF YOUNG STALLIONS ON THEIR STRESS REACTIONS WHEN SUBJECTED TO A STANDARDISED VETERINARY EXAMINATION
Peeters, Marie ULiege; Verwilghen, Denis ULiege; Serteyn, Didier ULiege et al

in Journal of Veterinary Behavior: Clinical Applications and Research (2011, September), 6

Detailed reference viewed: 39 (5 ULiège)
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See detailImpact of the transfer climate on the transfer of training: moderating role of job satisfaction and job engagement
Peters, Stéphanie ULiege; Liégeois, Arnaud; Faulx, Daniel ULiege

Conference (2011, May 28)

This paper presents first results of a study that examines the impact of the workplace climate on workplace training effectiveness. Here training effectiveness is conceptualised in terms of transfer of ... [more ▼]

This paper presents first results of a study that examines the impact of the workplace climate on workplace training effectiveness. Here training effectiveness is conceptualised in terms of transfer of training and the workplace climate is specified in terms of transfer climate. According to the theoretical framework by Carr, Schmidt, Ford and DeShon (2003), we hypothesise that the impact of the transfer climate on the transfer of training will be moderated and/or mediated by cognitive and affective states. Statistical analyses will be conducted to check the hypothesised mediating and moderating role of job satisfaction (affective state) and job engagement (cognitive state) between the transfer climate and the transfer of the newly acquired knowledge. Transfer climate has been broadly studied for its direct impact on transfer of training. The major issue of this study is to examine the interaction of the transfer climate with other variables In a longitudinal quantitative study, data are collected at the Belgian Sickness Fund. Participants are employees who took part to a training session between March and December 2010 (N=680). Right after the conclusion of the training program, each trainee is invited to fill the Learning transfer System Inventory (Holton, Bates, & Ruona, 2000), a scale measuring 16 dimensions of the transfer climate. One month later, participants are asked to fill a second questionnaire about their perception of the transfer (general and specific performance), job satisfaction (Price, 1977) and job engagement (Schaufeli & Bakker, 2003). [less ▲]

Detailed reference viewed: 157 (6 ULiège)
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See detailImpact of the treatment conditions of a formic/acetic acid delignification method on chemical structure and antioxidant activity of beech wood lignin
Simon, Mathilde ULiege; Vanderghem, Caroline ULiege; Richel, Aurore ULiege et al

Poster (2011)

The interest in lignocellulosic substrates is increasing because they are clearly identified for their high potential of development in energy and value-added molecules production. Indeed lignocellulosic ... [more ▼]

The interest in lignocellulosic substrates is increasing because they are clearly identified for their high potential of development in energy and value-added molecules production. Indeed lignocellulosic biomass constitutes a promising resource for a sustainable production of organic compounds and biobased products that could progressively replace molecules from the petrochemical industry. Until now lignocellulosic substrates were mainly used for the valorization of cellulose. Hemicelluloses and lignins were less valorized and often degraded after the process. However, due to their phenolic structure, lignins can be valorized in a lot of high-valued applications like vanillin production, replacement of petrochemical polymers, antioxidants for cosmetics and food industry, resins… In this study, a representative sample of beech wood (Fagus sylvatica L.) was collected in the region of Gaume in Belgium. Beech wood was delignified at atmospheric pressure by an organosolv process using a mixture of formic acid/acetic acid/water. The effect of cooking time and temperature was evaluated on the structure, physico-chemical properties and antioxidant activity of the lignins obtained from the black liquor after treatments. The structural and physico-chemical characteristics of the lignins were investigated with different tools like infrared spectrometry, thermogravimetric analysis, gel permeation chromatography after acetylation of lignins, NMR 1H, 13C and HSQC. The antioxidant activity was assessed by a spectrophotometric method using the α,α-diphenyl-β-picrylhydrazyl radical (DPPH). [less ▲]

Detailed reference viewed: 63 (14 ULiège)
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See detailImpact of the trophic strategy on the eco-functional diversification of a coral reef fish family
Gajdzik, Laura ULiege; Aguilar-Medrano, Rosalia; Parmentier, Eric ULiege et al

Conference (2015, September)

The analyses of the role of trophic strategies as promoter or constraint on processes of diversification remain understudied, especially in fish. The Pomacentridae (damselfishes), a species-rich (394 ... [more ▼]

The analyses of the role of trophic strategies as promoter or constraint on processes of diversification remain understudied, especially in fish. The Pomacentridae (damselfishes), a species-rich (394 species) and worldwide distributed reef fish family, include three main trophic guilds: (1) pelagic zooplankton feeders, (2) benthic feeders grazing on turf algae or biting polyps and (3) an intermediate group feeding on zooplankton, small benthic invertebrates and algae. Our study aims to analyze the role of the trophic strategies in the eco-functional diversity of Pomacentridae. Due to its feeding versatility, we hypothesize that the intermediate trophic group is the most successful group in terms of eco-functional diversity through evolutionary time. To target our aim, we compiled detailed dietary, environmental and behavioral data for 201 pomacentrid species, and compared the eco-functional diversity among trophic guilds. Various metrics, such as functional entity (i.e. unique combinations of functional traits) and functional richness revealed that the intermediate trophic group exhibited the lowest diversity. Then, we used time-calibrated phylogenies and comparative methods to evaluate the impact of trophic strategies on the tempo of ecological diversification. Results were consistent and the lowest rate of diversification was found for the intermediate trophic group. Our study shows that a generalist trophic strategy does not promote ecological diversification but being specialized may increase the ability to evolve greater diversity. [less ▲]

Detailed reference viewed: 54 (6 ULiège)
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See detailImpact of the type of dialysis membranes on the circulating concentration of markers of vitamin D metabolism.
Cavalier, Etienne ULiege; Torres, Pablo U.; Dubois, Bernard E. et al

in International Journal of Artificial Organs (2017)

INTRODUCTION: Kidney Disease Improving Global Outcomes (KDIGO) guidelines recommend vitamin D supplementation in hemodialyzed patients to monitor 25(OH)-vitamin D 25(OH)D levels. However, patient-to ... [more ▼]

INTRODUCTION: Kidney Disease Improving Global Outcomes (KDIGO) guidelines recommend vitamin D supplementation in hemodialyzed patients to monitor 25(OH)-vitamin D 25(OH)D levels. However, patient-to-patient inconsistency can be observed in response to the treatment. In this study, we aimed to evaluate the impact of the dialysis membrane on 25(OH)D, albumin (Alb) and vitamin D-binding protein (VDBP), the major players of vitamin D transport and storage. MATERIAL AND METHODS: Alb (Cobas), VDBP (R&D) and 25(OH)D (liquid chromatography-tandem mass spectrometry) were measured in 75 patients before and after a 4-hour dialysis session. Ten dialysis membranes were used: FX10, FX80, FX800, BK-2.1F, BG-2.1U, Rexeed 15 A, Rexeed 21 A, TS 1.8 SL and TS 2.1 SL manque la ELISIO 21H. Accordingly, 13 patients were dialyzed with membranes possessing high adsorption and high cut-off properties (BK), 17 with membranes possessing high adsorption but usual cut-off properties (BG) and all the remaining 45 patients with polysufone (PS) membranes with usual adsorptive and cut-off properties. Among these 45 patients treated with PS, we compared those treated by classical dialysis (HD) (n = 14) and hemodiafiltration (HDF) (n = 31). Results were corrected for total extracellular volume to take into consideration the hemoconcentration after dialysis. RESULTS: The 3 analytes showed a decreased concentration after the dialysis session. The decrease of ALB, VDBP and 25(OH)D was similar with the adsorptive (BG) and PS membranes. However, patients treated with adsorptive and high cut-off membrane (BK) presented a significantly higher decrease values of Alb (-9.6%[-15.1; -7.5]), of VDBP (-20.6%[-36.6; -17.2] and 25(OH)D (-17%[-27.3; -12.3]) compared to other membranes (BG and PS).When we limited our study to PS membranes, we did not observe any significant difference between the HD or HDF modalities in the decrease for any of the studied parameters. CONCLUSIONS: A significant loss of Alb, VDBP and 25(OH)D occurs after a dialysis session. This loss is significantly more important when patients are dialyzed with high adsorption and high cut-off dialysis membranes. [less ▲]

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See detailImpact of the Use of Crumb Rubber Modified Binder on Tire/Road Noise Generation
Luong, Jeanne ULiege; Bueno, M.; Teran, F. et al

Conference (2011, June)

The recycling of waste material produced by human activity is one of the challenges of our generation. One of the most serious environmental problems of the recent years is mass production of tire and the ... [more ▼]

The recycling of waste material produced by human activity is one of the challenges of our generation. One of the most serious environmental problems of the recent years is mass production of tire and the di􏰟culty of disposing of them. The material and energetic valorization of the wasted tires is possible through the extension of 􏰔green roads􏰕. The incorporation of crumb rubber from wasted tires in bi- tuminous binders allows the design of new asphalt pavements with a higher viscosity. A preliminary study to determine the impact of the use of crumb rubber modi􏰝ed bituminous binder in the sound generation level for a thin layer type BBTM11A, has been carried out by the LA2IC. These results are compared with sound level from a BBTM11A with a conventional binder. This work presents the acoustical characterization performed on the regional road CM-3102 in Ciudad Real (Castilla- La Mancha), based on the close proximity methodology (Tiresonic Mk4-LA2IC ). In addition, mea- surements of super􏰝cial macrotexture pro􏰝le have been realized with the LaserDynamicPG-LA2IC to study the relationship with close proximity road noise. Furthermore, sound absorption measurements of BBTM11A compacted samples have been analyzed to understand the mechanisms involved in the sound generation. The results show that addition of crumb rubber by the wet process leads, in this case (20% crumb rubber content), to a decrease in the sound level emitted by the interaction between tire and road surface, at low frequency by mu􏰠ing the vibrations and by sounf absorption at high frequency. [less ▲]

Detailed reference viewed: 19 (0 ULiège)
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See detailImpact of the use of two different methods to appreciate the depreciation costs of machinery on total production costs and on farm income in Wallonia (Belgium)
Illo, S.; Burny, Philippe ULiege

in Farm machinery and process management in sustainable agriculture : III International scientific symposium. Gembloux, 12-13 November 2008. Tome 1 (2008)

Detailed reference viewed: 11 (0 ULiège)
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See detailImpact of thermal cycles on the mobilization of shear strength for energy piles
Vasilescu, R.; Kotronis, P.; Dano, C. et al

Conference (2017)

Detailed reference viewed: 14 (0 ULiège)
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See detailImpact of three phtalate esters on the sexual reproduction of the Monogont rotifer, Brachionus calyciflorus
Cruciani, Valentina ULiege; Iovine, Catherine; Thomé, Jean-Pierre ULiege et al

in Ecotoxicology (2016), 25(1), 192-200

Phthalate esters are widespread contaminants that can cause endocrine disruption in vertebrates. Studies showed that molecules with hormonal activities in vertebrates and invertebrates can affect asexual ... [more ▼]

Phthalate esters are widespread contaminants that can cause endocrine disruption in vertebrates. Studies showed that molecules with hormonal activities in vertebrates and invertebrates can affect asexual and sexual reproduction in rotifers. We investigated the impact of di-hexylethyl phthalate (DEHP), di-butyl phthalate (DBP) and butylbenzyl phthalate (BBP), on the asexual and sexual reproduction of the freshwater monogonont rotifer Brachionus calyciflorus in order to determine a potential environmental risk for sexual reproduction. We observed that DEHP has no significant impact on both asexual and sexual reproduction up to 2 mg/L. DBP has a positive effect on asexual reproduction at concentrations from 0.05 to 1mg/L, but depresses it at 2 mg/L. Sexual reproduction is only affected with 2mg/L and the impact observed is negative. BBP displayed a negative impact on both asexual and sexual reproduction at 1 and 2 mg/L. However we showed that the impacts of BBP on fertilization rates observed are due to the decrease in population growth rates at these concentrations and are not due to a direct impact of BBP on the fertilization process. Similar conclusions are likely applicable to the impacts on mixis and production of cysts as well. Our results show that sexual reproduction in B. calyciflorus is not more sensitive than asexual reproduction to any of the substances tested which indicates the mode of action of these molecules is related to general toxicity, not to an interference with potential endocrine regulation of sexual reproduction. Comparison of effect concentrations and surface water contamination by phthalate esters suggests these compounds do not constitute a risk for these environments. [less ▲]

Detailed reference viewed: 27 (7 ULiège)
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See detailImpact of thresholding techniques on X-ray soil microtomogram analyses
Beckers, Eléonore ULiege; Léonard, Angélique ULiege; Beekkerk van Ruth, Jöran ULiege et al

in Geophysical Research Abstracts (2011), 13

Using X-ray microtomography, 3D soil structure can be visualised and analysed through useful factors like pore size distribution, shape, connectivity, orientation, etc. X-ray scans yield grey-level 2D ... [more ▼]

Using X-ray microtomography, 3D soil structure can be visualised and analysed through useful factors like pore size distribution, shape, connectivity, orientation, etc. X-ray scans yield grey-level 2D images, which can be recombined to form 3D structures. Treatments of the grey-level images can consist of either a binarization -distinguishing soil and pores- or a permeability level attribution directly linked to the grey-level values. The latter leads to problems in order to assign a permeability for each point (in soil a same grey level value can be assigned to points with a different permeability), as well as to analyse the 3D structure. On the other hand, treatment of black and white 3D structures is well-handled. However, the impact of the choice of one thresholding technique on the resulting images has already been demonstrated. Moreover, thresholding methods are various and numerous. Many of them are based on the image histogram analysis. But because of the soil complexity, the relevance of these techniques becomes debatable, with a risk of producing non reliable images. We propose to palliate this with a simple new algorithm based on physical measurements: it uses a loop fixing the threshold value in order to match the measured porosity for each sample. In this communication, our point is to highlight the impact of different thresholding techniques on the analysis and interpretation of our soil microtomograms. The underlying questions could be: Does the thresholding method influence our conclusions? Are the results depending on the sample itself or on the methodology? In order to answer these questions we tested the Otsu technique and our physically based algorithm. Soils samples were removed from the upper layer (Ap horizon) of a silty soil (Gentinnes, Brabant Walloon, Belgium) in plots with different management practices. In fact, since 2004, the field has been cultivated in conventional tillage (CT) or reduced tillage (RT). In order to empty the meso- and macroporosity, samples were placed under a 1.5 MPa pressure (Richards apparatus). Samples were then scanned by X-ray microtomography using a Skyscan-1172 high-resolution desktop micro-CT system (Skyscan, Kontich, Belgium). The cone beam source operated at 100 kV, using an aluminium filter. The detector configuration, i.e. 1048x2000 pixels with a 16-bit X-ray camera, and the distance source-object-camera were adjusted to produce images with a pixel size of 17 µm. Porosity was measured for each scanned sample. Then the threshold methods -the Otsu technique on one hand and our developed algorithm on the other - were applied, and morphological factors were calculated for both methods. A comparison of the first results shows a threshold influence on average porosity and number of pores, but also on connectivity factors and size distribution. The apparent porosity of the images, as well as connectivity, is underestimated with the Otsu technique. Despite the fact that the changes induced by thresholding are more important for RT than CT, global conclusions about the comparison of these agricultural practices are approximately the same in this case. However, differences between tillage systems are less important with the Otsu method, confirming the impact of choosing the adapted threshold method. [less ▲]

Detailed reference viewed: 102 (36 ULiège)
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See detailImpact of tillage on CO2 and N2O efflux in an agricultural crop
Lognoul, Margaux ULiege; Theodorakopoulos, Nicolas ULiege; Hiel, Marie-Pierre ULiege et al

Poster (2016, April 20)

CO2 and N2O fluxes exchanged by a maize crop were measured from June to Octboer 2015 using a homemade automated system of dynamic closed chambers. We studied the impact of tillage (reduced and ... [more ▼]

CO2 and N2O fluxes exchanged by a maize crop were measured from June to Octboer 2015 using a homemade automated system of dynamic closed chambers. We studied the impact of tillage (reduced and conventional) on greenhouse gas emissions and nitrous oxide flux dynamics. [less ▲]

Detailed reference viewed: 77 (19 ULiège)