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See detailImprovement of the barrier properties of Nafion® by fluoro-modified montmorillonite
Thomassin, Jean-Michel ULg; Pagnoulle, Christophe; Bizzari, Didier et al

in Solid State Ionics (2006), 177(13-14), 1137-1144

Montmorillonite (MMT) was modified by two types of cationic fluorosurfactants in order to improve compatibility with and dispersion within Nafion® membranes. Perfluoropolyether-containing cationic ... [more ▼]

Montmorillonite (MMT) was modified by two types of cationic fluorosurfactants in order to improve compatibility with and dispersion within Nafion® membranes. Perfluoropolyether-containing cationic surfactant improved efficiency, by improving the barrier properties of Nafion® towards methanol. Moreover, the fluoro-modified MMT had no deleterious impact on the ionic conductivity of the membranes in contrast to conventional organo-modified MMT. The performances of a small size fuel cell were accordingly improved. [less ▲]

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See detailImprovement of the cellulose hydrolysis yields and hydrolysate concentration by management of enzymes and substrate input
Jacquet, Nicolas ULg; Vanderghem, Caroline ULg; Blecker, Christophe ULg et al

in Cerevisia : Belgian Journal of Brewing and Biotechnology (2012), 37

In order to improve the hydrolysis of cellulose fiber and to obtain highly concentrated hydrolysate, two methods based on successive addition of enzyme and substrate were assessed. The first method, which ... [more ▼]

In order to improve the hydrolysis of cellulose fiber and to obtain highly concentrated hydrolysate, two methods based on successive addition of enzyme and substrate were assessed. The first method, which required only substrate addition, allowed to increase by 50% the hydrolysate concentration and to decrease by 30% enzyme units needed. The second method highlighted the ability to reach very high concentrated hydrolysate (up to 170 g/l) by simultaneous addition of enzyme and substrate. In parallel, relationships between some limiting factors and the yields of hydrolysis were investigated. In conclusion, viscosity evolution of cellulose suspension during hydrolysis step was investigated with an aim to improve the management of enzyme and substrate addition. [less ▲]

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See detailImprovement of the Composition of Tunisian Myrtle Berries (Myrtus 2 communis L.) Alcohol Extracts
Snoussi, A.; Ben haj Koubaier, H.; Essaidi, Ismahen et al

in Journal of Agricultural and Food Chemistry (2011), 3b2(9),

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See detailImprovement of the current Version of the EC3 fot the lateral torsional buckling of unrestrained steel beams under fire condition
Vila Real, P. M. M.; Lopes, N.; Simoes da Silva, L. et al

in Franssen, Jean-Marc; Benichou; Kodur (Eds.) et al Proceedings of SiF'04: Third International Structures in Fire workshop (2004)

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See detailImprovement of the decision efficiency of the accuracy profile by means of a desirability function for analytical methods validation - Application to a diacetyl-monoxime colorimetric assay used for the determination of urea in transdermal iontophoretic extracts
Rozet, Eric ULg; Wascotte, Valentine; Lecouturier, Nathalie et al

in Analytica Chimica Acta (2007), 591(2), 239-247

Validation of analytical methods is a widely used and regulated step for each analytical method. However, the classical approaches to demonstrate the ability to quantify of a method do not necessarily ... [more ▼]

Validation of analytical methods is a widely used and regulated step for each analytical method. However, the classical approaches to demonstrate the ability to quantify of a method do not necessarily fulfill this objective. For this reason an innovative methodology was recently introduced by using the tolerance interval and accuracy profile, which guarantee that a pre-defined proportion of future measurements obtained with the method will be included within the acceptance limits. Accuracy profile is an effective decision tool to assess the validity of analytical methods. The methodology to build such a profile is detailed here. However, as for any visual tool it has a part of subjectivity. It was then necessary to make the decision process objective in order to quantify the degree of adequacy of an accuracy profile and to allow a thorough comparison between such profiles. To achieve this, we developed a global desirability index based on the three most important validation criteria: the trueness, the precision and the range. The global index allows the classification of the different accuracy profiles obtained according to their respective response functions. A diacetyl-monoxime colorimetric assay for the determination of urea in transdermal iontophoretic extracts was used to illustrate these improvements. [less ▲]

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See detailImprovement of the Detection of Neurodegenerative Alzheimer's Disease through a Specific Surface Chemistry Applied onto the Inner Surface of the Titration Well.
Mille, Caroline; Debarnot, Dominique; Zorzi, Willy ULg et al

in Journal of Biomaterials Science. Polymer Edition (2011)

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See detailImprovement of the interaction formulae for beam columns in Eurocode 3
Boissonnade, N.; Jaspart, Jean-Pierre ULg; Muzeau, J. P. et al

in Computers & Structures (2002), 80(27-30), 2375-2385

This paper presents a new proposal for beam-column interaction formulae initially based on second-order in-plane elastic theory, as an alternative to those proposed in the Eurocode 3 pre-standard [1]. It ... [more ▼]

This paper presents a new proposal for beam-column interaction formulae initially based on second-order in-plane elastic theory, as an alternative to those proposed in the Eurocode 3 pre-standard [1]. It has been derived according to the following requirements: theoretical background, clear physical meaning, consistency with the other related formulae of Eurocode 3 and accuracy. Besides that, the suggested formulae cover all required continuities: between the cross-section classes, from plasticity to elasticity as slenderness and axial force increase, and continuity between all the individual stability member checks and cross-section verifications. Further to the presentation of the formulae and their background, the good agreement of the proposal is shown through an extensive comparison with more than 15,000 results of finite element numerical simulations. (C) 2002 Civil-Comp Ltd. and Elsevier Science Ltd. All rights reserved. [less ▲]

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See detailImprovement of the metabolic clearance rate of insulin after a protein-supplemented fast in obese subjects.
PAQUOT, Nicolas ULg; SCHEEN, André ULg; Salvatore, T. et al

in International Journal of Obesity (1992)

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See detailImprovement of the Parametric Fire of Eurocode 1 based on Experimental Tests Results
Franssen, Jean-Marc ULg

in Curtat, Michel (Ed.) FIRE SAFETY SCIENCE, Proceedings of the sixth international Symposium (2000)

The basic equations, the limitations and the main features of the parametric fire proposed in Annexe B of Eurocode 1 are given. 48 experimental fire tests are used to assess the validity of this model ... [more ▼]

The basic equations, the limitations and the main features of the parametric fire proposed in Annexe B of Eurocode 1 are given. 48 experimental fire tests are used to assess the validity of this model. The model has been applied to these tests and the comparison has been made, for each test, on the maximum temperature in the air and on the maximum temperature calculated in 2 hypothetical steel sections, one thermally protected and one unprotected. The agreement is very poor for the air and for the unprotected steel temperature, and somewhat better for the protected steel temperature. Some proposals are made which allow to improve the agreement, while keeping the same expressions for the parametric fire. These modifications concern the equivalent thermal properties of multi material walls, and the introduction of a minimum duration of the fire and a of a ventilation effect in case of fuel-bed controlled fires. [less ▲]

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See detailImprovement of the thermoelectric properties of [Bi1.68Ca2O4-delta](RS)[CoO2](1.69) cobaltite by chimie douce methods
Muguerra, Hervé; Rivas-Murias, Beatriz; Traianidis, Maria et al

in Journal of Solid State Chemistry (2010), 183(6), 1252-1257

[Bi1 68Ca2O4 delta](RS)[CoO2](1 69) has been obtained by different chimie douce methods and uniaxially or isostatically pressed The influence of these parameters on the thermoelectric properties has been ... [more ▼]

[Bi1 68Ca2O4 delta](RS)[CoO2](1 69) has been obtained by different chimie douce methods and uniaxially or isostatically pressed The influence of these parameters on the thermoelectric properties has been investigated. Contrary to the Seebeck coefficient, which remains unchanged, the electrical conductivity is greatly modified In particular, spray-drying synthesis followed by uniaxial pressing results in an electrical conductivity two times larger than in the case of conventional solid state synthesis. Our results suggest that a narrow particle size distribution is beneficial to the thermoelectric properties of the layered compounds. The spray-drying technique seems to be promising to Improve the electrical conductivity of layered materials. Moreover, this method presents other advantages (homogeneous samples and less energetic processing) which could be interesting to the future manufacturing of thermoelectric devices (C) 2010 Elsevier Inc. All rights reserved [less ▲]

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See detailImprovement of the Theta(+) width estimation method on the light cone
Lorce, Cédric ULg

in Physical Review D (2006), 74(5),

Recently, Diakonov and Petrov have suggested a formalism in the chiral quark soliton model allowing one to derive the 3-, 5-, 7-, ...quark wave functions for the octet, decuplet, and antidecuplet. They ... [more ▼]

Recently, Diakonov and Petrov have suggested a formalism in the chiral quark soliton model allowing one to derive the 3-, 5-, 7-, ...quark wave functions for the octet, decuplet, and antidecuplet. They have used this formalism and many strong approximations in order to estimate the exotic Theta(+) width. The latter has been estimated to similar to 4 MeV. Besides they obtained that the 5-quark component of the nucleon is about 50% of its 3-quark component meaning that relativistic effects are not small. We have improved the technique by taking into account some relativistic corrections and considering the previously neglected 5-quark exchange diagrams. We also have computed all nucleon axial charges. It turns out that exchange diagrams affect very little Diakonov's and Petrov's results while relativistic corrections reduce the Theta(+) width to similar to 2 MeV and the 5- to 3-quark component of the nucleon ratio to 30%. [less ▲]

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See detailImprovement of transport condition of swabs for group B streptococcal (GBS) screening
MELIN, Pierrette ULg; Dodémont, Magali; Sarlet, Gilles ULg et al

in Program and Abstract of the 53rd Intersciences Conference on Antimicrobial Agents and Chemotherapy. Washington, USA: ASM. (2013, September)

BACKGROUND For the screening-based strategy for prevention of perinatal GBS disease, CDC Guidelines as many others recommend use of appropriate transport media (Amies, Stuart, e.g.) and processing of ... [more ▼]

BACKGROUND For the screening-based strategy for prevention of perinatal GBS disease, CDC Guidelines as many others recommend use of appropriate transport media (Amies, Stuart, e.g.) and processing of specimen as soon as possible within 1 to 4 days. False negative cultures occur for several causes including lost of GBS viability during transport. Could Lim broth, recommended for the selective enrichment, and Granada tubes be used as transport media for swab? Simulating conditions of routine practice, Lim broth and Granada tubes, were evaluated in vitro as transport media. METHODS Tubes of 3 brands of Lim broth (Becton Dickinson, bioMérieux, Copan) and Granada tubes (bioMérieux) were inoculated with low inocula of 10-100 CFU of GBS. Each type of tubes was incubated at 4°C, room T° (RT) and 35°C. GBS were enumerated from each tube by subculture on blood agar after 1, 2, 3 and 4 days of storage at the different T°. All tests were processed in triplicates with 3 strains of GBS belonging to serotype Ia, III and V. RESULTS No difference of survival was observed between the 3 strains. T° had significant impact on GBS recovery for each type of tubes. At 4°C the viability was hardly sustained along the 4 days. At RT and 35°C, an increase >6 log of the inocula was observed. The increase of GBS density was sustained at least 4 days for the 3 brands of Lim broth. For the Granada broth, such increase was also observed but at day 3 for tubes incubated at 35°C, viability decreased and for some tubes, GBS subcultures were negative at day 3 or 4. CONCLUSION To improve sensitivity of GBS screening cultures, Lim broth could be recommended as a strong transport media and the advisable storage condition would be RT to 35°C up to 4 days. In this way, initiating selective enrichment culture at the time of collection of specimen would provide higher sensitivity even for low density of colonization. Transport at 4°C should be avoided in favour with RT to 35°C. Studies in clinical setting are expected. For Granada tubes, storage at RT was fine but improvement seemed restricted in time at 35°C as there was a loss of viability after 3 days. For Granada tubes, extended evaluation and delimitation of use are needed. [less ▲]

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See detailImprovement of Transport Safety by control of fog production in a chamber
Andre, Philippe ULg

Report (2003)

Rapport final du projet "Improvement of Transport Safety by control of fog production in a chamber", qui s'est déroulé entre 2000 et 2003, finance par l'Union Européenne, dans le cadre du programme ... [more ▼]

Rapport final du projet "Improvement of Transport Safety by control of fog production in a chamber", qui s'est déroulé entre 2000 et 2003, finance par l'Union Européenne, dans le cadre du programme "Growth" [less ▲]

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See detailImprovement of xylanase production by Penicillium canescens 10-10c in solid-state fermentation
Assamoi, antoine; Delvigne, Frank ULg; Aldric, Jean-Marc ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2008)

Detailed reference viewed: 31 (10 ULg)