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See detailBeneficial effect of carbon nanotubes on the performances of Nafion membranes in fuel cell applications
Thomassin, Jean-Michel ULg; Kollar, Jozef; Caldarella, Giuseppe ULg et al

in Journal of Membrane Science (2007), 303(1-2), 252-257

Multi-walled carbon nanotubes (MWCNTs) were dispersed by melt-extrusion within Nafion(R) membranes in order to decrease the methanol permeability without deleterious effect on the ionic conductivity. The ... [more ▼]

Multi-walled carbon nanotubes (MWCNTs) were dispersed by melt-extrusion within Nafion(R) membranes in order to decrease the methanol permeability without deleterious effect on the ionic conductivity. The risk of short-circuits was minimized by keeping the carbon nanotubes content lower than the percolation threshold. Two series of carbon nanotubes grafted by carboxylic acid groups were used, i.e., commercially available carbon nanotubes and MWCNTs home-grafted by carboxylic acid containing alkyl radicals. The second series of nanotubes were more resistant to break-up during melt-processing. Methanol permeability was decreased by approximately 60% without any decrease in the ionic conductivity. In parallel, the Young's modulus was increased by 140% and 160% as compared to pure Nafion(R) at MWCNT contents of 1 and 2 wt%, respectively. [less ▲]

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See detailBeneficial effect of the rhizosphere microbial community for plant growth and health.
Nihorimbere, V.; Ongena, Marc ULg; Smargiassi, M. et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(2), 327-337

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See detailBeneficial effect of triphenylphosphine on the bulk polymerization of L,L-lactide promoted by 2-ethylhexanoic acid tin (II) salt
Degée, Philippe; Dubois, Philippe ULg; Jacobsen, S. et al

in Journal of Polymer Science. Part A, Polymer Chemistry (1999), 37(14), 2413-2420

The ring-opening polymerization of L,L-lactide has been studied in bulk using 2-ethylhexanoic acid tin (II) salt, Sn(Oct)2, as a catalyst over a wide range of temperature and monomer to Sn(Oct)2 molar ... [more ▼]

The ring-opening polymerization of L,L-lactide has been studied in bulk using 2-ethylhexanoic acid tin (II) salt, Sn(Oct)2, as a catalyst over a wide range of temperature and monomer to Sn(Oct)2 molar ratio. Although Sn(Oct)2 was known to initiate a fast polymerization, it is reported now that some Lewis bases, particularly triphenylphosphine (P()3), can increase further the polymerization rate, without any detrimental effect on the polylactide thermal stability. In order to optimize the balance between propagation and competing depolymerization reactions, the experimental conditions, i.e., temperature and concentration of Sn(Oct)2 and P()3 have been optimized. The up-scaling of the laboratory experiments to reactive extrusion has proved to be feasible, which demonstrates the efficiency of this catalytic system to produce polylactide in a continuous one-stage polymerization process. [less ▲]

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See detailBeneficial effects of Bacillus subtilis on field-grown tomato in Burundi : reduction of local Fusarium disease and growth promotion.
Nihorimbere, V.; Ongena, Marc ULg; Cawoy, Hélène ULg et al

in African Journal of Microbiology Research [=AJMR] (2010), 4

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See detailA Beneficial Role for Immunoglobulin E in Host Defense against Honeybee Venom.
Marichal, Thomas ULg; Starkl, Philipp; Reber, Laurent L. et al

in Immunity (2013), 39(5), 963-75

Allergies are widely considered to be misdirected type 2 immune responses, in which immunoglobulin E (IgE) antibodies are produced against any of a broad range of seemingly harmless antigens. However ... [more ▼]

Allergies are widely considered to be misdirected type 2 immune responses, in which immunoglobulin E (IgE) antibodies are produced against any of a broad range of seemingly harmless antigens. However, components of insect venoms also can sensitize individuals to develop severe IgE-associated allergic reactions, including fatal anaphylaxis, upon subsequent venom exposure. We found that mice injected with amounts of honeybee venom similar to that which could be delivered in one or two stings developed a specific type 2 immune response that increased their resistance to subsequent challenge with potentially lethal amounts of the venom. Our data indicate that IgE antibodies and the high affinity IgE receptor, FcepsilonRI, were essential for such acquired resistance to honeybee venom. The evidence that IgE-dependent immune responses against venom can enhance survival in mice supports the hypothesis that IgE, which also contributes to allergic disorders, has an important function in protection of the host against noxious substances. [less ▲]

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See detailThe beneficial role of different auxins and polyamines at successive stages of somatic embryo formation and development of Panax ginseng in vitro
Kevers, Claire ULg; Gaspar, Thomas ULg; Dommes, Jacques ULg

in Plant Cell, Tissue & Organ Culture (2002), 70(2), 181-188

The production of viable plantlets via somatic embryogenesis in Panax ginseng requires different culture media corresponding to successive developmental stages. The effects of several auxins and ... [more ▼]

The production of viable plantlets via somatic embryogenesis in Panax ginseng requires different culture media corresponding to successive developmental stages. The effects of several auxins and polyamines have been tested at various steps. Multiplication of the embryogenic root-derived callus has been optimized on half-strength MS medium supplemented with 3-(benzo[b]selenyl)acetic acid (BSAA, a synthetic auxin) and kinetin; exogenously applied polyamines were deleterious at this stage, causing browning of the callus, diminished capacity of embryo initiation, and an increased tendency to hyperhydricity. BSAA again appeared to be the most favourable auxin at the initiation stage, but here its action was reinforced by the presence of polyamines, spermidine being the most efficient. Among the auxin needed at the next step, i.e., for the regeneration of embryos, the two seleniated auxins BSAA and seleniated 2,4-dichlorophenoxyacetic acid (2,4-D-Se) were the more efficient. For the harmonious development of plantlets, i.e., the simultaneous outgrowth of shoots and roots, the polyamines were favourable, with a greater efficiency for spermine. [less ▲]

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See detailThe beneficial toxicity paradox of antimicrobials in leg ulcer healing impaired by a polymicrobial flora: a proof-of-concept study.
Fumal, I.; Braham, C.; Paquet, Philippe ULg et al

in Dermatology : International Journal for Clinical & Investigative Dermatology (2002), 204 Suppl 1

BACKGROUND: Some of the views contrasting the beneficial and toxic effects of antimicrobials upon wound healing remain controversial. OBJECTIVE: To assess the clinical relevance of histological findings ... [more ▼]

BACKGROUND: Some of the views contrasting the beneficial and toxic effects of antimicrobials upon wound healing remain controversial. OBJECTIVE: To assess the clinical relevance of histological findings following antimicrobial applications on chronic leg ulcers. METHOD: The present study was performed in three parallel groups of 17 patients suffering from at least 2 similar chronic leg ulcers. Clinical planimetric assessments were performed before and after 3 and 6 weeks of treatment using hydrocolloid dressings. In addition, 1 ulcer in each patient received applications of povidone-iodine (PVP-I), silver sulfadiazine or chlorhexidine digluconate. Histological examinations were made at inclusion and after the 6-week therapy. Time to healing was also recorded. RESULTS: At entry in the study, fibroblasts, macrophages, neutrophils and vessels were abundant in the ulcers. In addition, focal necrotizing vasculitis was related to the microbiological load. Compared to the control lesions, both the healing rate and time to healing of the leg ulcers showed a modest improvement at the sites receiving silver sulfadiazine (2-7%) or chlorhexidine digluconate (-1 to 5%). By contrast, PVP-I increased significantly the healing rate (4-18%, p < 0.01), and time to healing was reduced by 2-9 weeks (p < 0.01). The 3 antimicrobials decreased the bacterial density, and the vascular margination and migration of inflammatory cells, thus abating the vasculitic changes. PVP-I applications did not alter the microvessels and did not significantly reduce the density in dendrocytes and fibroblasts. By contrast, both silver sulfadiazine and chorhexidine digluconate appeared to alter the superficial microsvasculature including the dendrocyte population. CONCLUSION: Although topical antimicrobials may apparently achieve almost similar activity on the bacterial load inside chronic leg ulcers, the toxicity upon host cells was different among these agents. PVP-I appeared to be an efficient compound in these respects exhibiting a positive and relevant clinical effect. [less ▲]

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See detailBeneficial use of lignosulfonates in in vitro plant cultures: stimulation of growth, of multiplication and of rooting
Docquier, Sarah; Kevers, Claire ULg; Lambe, Pascal et al

in Plant Cell, Tissue & Organ Culture (2007), 90(3), 285-291

Lignosulfonates (LIGNs), low-cost by-products from the paper industry, are already commercialized as fertilizers; they stimulate both vegetative and reproductive growths and fructification. LIGNs have ... [more ▼]

Lignosulfonates (LIGNs), low-cost by-products from the paper industry, are already commercialized as fertilizers; they stimulate both vegetative and reproductive growths and fructification. LIGNs have been tested in in vitro cultures and here too, they improve shoot growth and vigor, and rooting of various plant materials. This study aimed at to extend the in vitro application of LIGNs at different developmental stages in order to increase the productivity of systems generating vitroplants. The present results showed the beneficial effects of various LIGN applications on growth of a tropical orchid, Phalaenopsis, multiplication of Saint-paulia ionantha and rooting of poplar and Sequoiadendron sempervirens shoot cuttings. One of the most interesting observations was the stimulating effect of Ca-chelated LIGN on growth of Phalaenopsis and on rooting of Sequoiadendron. The significant and reproducible effects of LIGNs at several steps of micropropagation of different plant materials represent a potential tool improve quality without embarrassing side-effects. [less ▲]

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See detailBeneficiation of Jarkhand (India) iron ore.
Bastin, David ULg

Report (2009)

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See detailThe benefit and cost of winner-picking: Redistribution vs. Incentives
Gautier, Axel ULg; Heider, Florian

in Journal of Institutional and Theoretical Economics = Zeitschrift für die Gesamte Staatswissenschaft (2009), 165(4), 622-649

This paper examines the agency cost of winner-picking in multidivision firms and uses explicit incentive contracts to analyze the interaction between corporate headquarters' investment and incentive ... [more ▼]

This paper examines the agency cost of winner-picking in multidivision firms and uses explicit incentive contracts to analyze the interaction between corporate headquarters' investment and incentive policies. Winner-picking, i.e. the efficient reallocation of scarce resources in an internal capital market, adds an extra layer of noise to the moral hazard problem of incentivizing division managers to produce the resources that can then be redistributed. In particular, division managers with strong future investment opportunities anticipate that headquarters will bail them out should they fail to produce enough resources themselves. This reduces incentives to create the resources in the first place with possible consequences for the optimal investment policy. [less ▲]

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See detailThe benefit of musical and linguistic expertise on language acquisition in sung material
Larrouy, Pauline ULg; Leybaert, Jacqueline; Kolinsky, Régine

in Musicae Scientae (2013), 17(2), 217-228

Music learning and training appear to have large cross-domain transfer effects: they are beneficial in various cognitive domains including language. The present study aimed at examining the role of music ... [more ▼]

Music learning and training appear to have large cross-domain transfer effects: they are beneficial in various cognitive domains including language. The present study aimed at examining the role of music expertise on how musical and linguistic information contained in songs is used. However, as the superiority of musicians could be attributed to improvements in executive functions (e.g., Bialystok, & DePape, 2009), we tried to isolate the role of music training by comparing music experts to both non-experts and language experts. To this aim we used the tasks proposed by Schön, Boyer, Moreno, Besson, Peretz, and Kolinsky (2008), who compared artificial language learning (ALL) based on spoken sequences to ALL based on sung sequences. These authors concluded that songs, more than speech, allow fast and strong learning. In contrast to Schön et al. (2008), the benefit of songs on ALL was not found among nonexperts in our study. However, there was a highly significant interaction between type of expertise and materials. The music experts were the only group to benefit from the matching of linguistic and music information, hence showing a different profile than language experts. The present data thus confirms the specificity of transfer effects linked to music expertise. [less ▲]

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See detailBenefit of nesting a regional model into a large-scale ocean model instead of climatology. Application to the West Florida Shelf
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Weiberg, R. H.

in Continental Shelf Research (2008), 28(4-5), 561-573

The impact of open boundary conditions on the dynamics and accuracy of a regional West Florida Shelf model is addressed. A ROMS-based model nested in monthly climatological temperature and salinity and in ... [more ▼]

The impact of open boundary conditions on the dynamics and accuracy of a regional West Florida Shelf model is addressed. A ROMS-based model nested in monthly climatological temperature and salinity and in the North Atlantic HYCOM model is implemented. The model results of these nesting implementations are compared to altimetry, in situ temperature time series, and ADCP and high-frequency (HF) radar currents. A significant improvement of the model results is found using the boundary conditions of the HYCOM model over the climatology. The ageostrophic nature of the LC is studied and the benefit using the velocity and surface elevation boundary conditions is shown. (C) 2007 Elsevier Ltd. All rights reserved. [less ▲]

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See detailBenefit of NIRS for products under protected geographical indication label : the example of the Belgian Ardenne ham.
Sindic, Marianne ULg; Collard, Caroline; Sinnaeve, Georges et al

in Abstracts of the 13th International conference on near infrared spectroscopy (2007, June)

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See detailBenefit of revascularization for stable ischaemic heart disease: the jury is still out.
Fassa, Amir-Ali; Wijns, William; Kolh, Philippe ULg et al

in European heart journal (2013), 34(21), 1534-8

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See detailBenefit of using flood risk analysis at the micro level for evaluating local protection measures
Dewals, Benjamin ULg; Detrembleur, Sylvain ULg; Archambeau, Pierre ULg et al

Conference (2012, April 23)

In numerous river basins, climate projections converge towards conditions leading to a significant increase in peak discharges both in terms of intensity and frequency. Therefore, managing flood risk will ... [more ▼]

In numerous river basins, climate projections converge towards conditions leading to a significant increase in peak discharges both in terms of intensity and frequency. Therefore, managing flood risk will remain an issue of primary importance. Besides, it is currently shifting from the search for full protection against flooding towards the management of the impacts of flooding. In this respect, the elaboration of effective flood management strategies should rely on an integrated risk-based approach, encompassing not only hydraulic criteria but also economic, social and environmental factors. In addition, the considered level of detail in the analysis should be relevant given the available data and the expected outcomes. While such risk analyses have so far been mostly undertaken at a macro- or meso-scale, the herein described analysis is performed at a micro-scale, meaning that the considered assets are the individual buildings, parcels or facilities. [less ▲]

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See detailBenefits of a New Pediatric Triple-Chamber Bag for Parenteral Nutrition in Preterm Infants
Rigo, J; Marlowe, ML; Bonnot, D et al

in Journal of Pediatric Gastroenterology and Nutrition (2012), 54(2), 210-217

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See detailBenefits of a physical training program after back school for chronic low back pain patients
Demoulin, Christophe ULg; Maquet, Didier ULg; Tomasella, Marco ULg et al

in Journal of Musculoskeletal Pain (2006), 14(2), 21-31

Objectives: Compare a treatment combining a back school program and physical training with a treatment consisting of only aback school program undertaken by chronic low back pain [CLBP] patients. Methods ... [more ▼]

Objectives: Compare a treatment combining a back school program and physical training with a treatment consisting of only aback school program undertaken by chronic low back pain [CLBP] patients. Methods: Forty CLBP patients [21 females] completed an educational back school program. Once ended, 17 subjects [the Education-Physical Group [EPG]] started physical training sessions attended twice a week [90 minutes] for six weeks. The others constituted the Education Group [EG]. All subjects performed three tests: the pain visual analog scale, the Dallas questionnaire assessing quality of life, and an ergonomic test at the beginning [Day [D] 1], at the end [D21] of the back school program, and three months later [D120]. The EPG also carried out physical tests at the start and at the end of the physical training. Results: At D21, no significant difference in pain and Dallas scores appeared, although patients of both groups performed the ergonomic test significantly better. At D120, the decrease of pain intensity and the quality of life improvement were significant in both groups [P < 0.05]. The extent of the pain intensity decrease was significantly higher in the EPG compared to the EG. The EPG displayed improvements in most physical assessments [P < 0.05]. Only the increase of knee extensors strength correlated significantly with the improvements of quality of life and ergonomic function scores. Conclusions: This study supports positive effects of a back school program for CLBP patients. Additional physical training sessions lead to lower pain intensity, greater improvement of quality of life than back school sessions only, as well as improvement of muscle performances. The increase of the knee extensors strength might have helped to decrease the pain and improve the quality of life. [less ▲]

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See detailBenefits of an out-patient multidisciplinary rehabilitation program in the treatment of chronic low back pain
Vanderthommen, Marc ULg; Demoulin, Christophe ULg; GROSDENT, Stéphanie ULg et al

in Abstract book of 6th Interdisciplinary World Congress on Low Back & Pelvic Pain (2007)

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See detailThe Benefits of Errorless Learning for Serial Reaction Time Performance in Alzheimer's Disease.
Schmitz, Xavier ULg; Bier, Nathalie; Joubert, Sven et al

in Journal of Alzheimer's Disease [=JAD] (2014), 39(2), 287-300

Identifying the conditions favoring new procedural skill learning in Alzheimer’s disease (AD) could be important for patients’ autonomy. It has been suggested that error elimination is beneficial during ... [more ▼]

Identifying the conditions favoring new procedural skill learning in Alzheimer’s disease (AD) could be important for patients’ autonomy. It has been suggested that error elimination is beneficial during skill learning, but no study has explored the advantage of this method in sequential learning situations. In this study, we examined the acquisition of a 6-element perceptual-motor sequence by AD patients and healthy older adults (control group). We compared the impact of two preliminary sequence learning conditions (Errorless vs. Errorful) on Serial Reaction Time performance at two different points in the learning process. A significant difference in reaction times for the learned sequence and a new sequence was observed in both conditions in healthy older participants; in AD patients, the difference was significant only in the errorless condition. The learning effect was greater in the errorless than the errorful condition in both groups. However, while the errorless advantage was found at two different times in the learning process in the AD group, in the control group this advantage was observed only at the halfway point. These results support the hypothesis that errorless learning allows for faster automation of a procedure than errorful learning in both AD and healthy older subjects. [less ▲]

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