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See detailAnalysis of furan by GC/MS
Scholl, Georges ULiege; Eppe, Gauthier ULiege; Scippo, Marie-Louise ULiege et al

Poster (2007)

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See detailAnalysis of gas holdup in bubble columns with non-Newtonian fluid using electrical resistance tomography and dynamic gas disengagement technique
Fransolet, E.; Crine, A.; Marchot, Pierre ULiege et al

in Chemical Engineering Science (2005), 60(22 Sp. Iss. SI), 6118-6123

This paper presents an experimental analysis of the influence of the liquid rheology on the gas flow pattern in a bubble column reactor. Aqueous solutions of xanthan are selected as an example of non ... [more ▼]

This paper presents an experimental analysis of the influence of the liquid rheology on the gas flow pattern in a bubble column reactor. Aqueous solutions of xanthan are selected as an example of non-Newtonian shear thinning fluid. Averaged gas holdup is determined by two experimental techniques: parietal pressure probes and electrical resistance tomography (ERT). ERT is also used to provide 2D images of the gas phase distribution in a column cross-section. Bubble size distributions are evaluated by a gas disengagement technique using the parietal pressure probes. All these techniques clearly show the gas flow pattern is different in Newtonian and non-Newtonian fluids. Gas holdup values decrease when increasing the liquid viscosity and reach a minimum or a plateau. Homogeneous flow regime, observed in water at low gas velocities, tends to disappear when viscosity increases. This evolution is visualized by a much less isotropic distribution of the gas phase within cross-section of the column and by the appearance of much larger bubbles due to an increased coalescence phenomenon. (c) 2005 Elsevier Ltd. All rights reserved. [less ▲]

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See detailAnalysis of gene expression in canine idiopathic pulmonary fibrosis
Krafft, Emilie ULiege; Laurila, HP; peters, IR et al

in Veterinary Journal (2013), 198(2), 479-486

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See detailAnalysis of gene expression in canine sino-nasal aspergillosis and lymphoplasmacytic rhinitis: a transcriptomic analysis.
Vanherberghen, Morgane ULiege; Bureau, Fabrice ULiege; Peters, Iain et al

in Veterinary Microbiology (2012), 157(1-2)

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See detailAnalysis of Genes Associated With Monogenic Primary Immunodeficiency Identifies Rare Variants in XIAP in Patients With Crohn's Disease.
Amininejad, Leila; Charloteaux, Benoît ULiege; Theatre, Emilie ULiege et al

in Gastroenterology (2018), 154(8), 2165-2177

BACKGROUND & AIMS: A few rare monogenic primary immunodeficiencies (PIDs) are characterized by chronic intestinal inflammation that resembles Crohn's disease (CD). We investigated whether 23 genes ... [more ▼]

BACKGROUND & AIMS: A few rare monogenic primary immunodeficiencies (PIDs) are characterized by chronic intestinal inflammation that resembles Crohn's disease (CD). We investigated whether 23 genes associated with 10 of these monogenic disorders contain common, low-frequency, or rare variants that increase risk for CD. METHODS: Common and low frequency variants in 1 Mb loci centered on the candidate genes were analyzed using meta-data corresponding to genotypes of approximately 17,000 patients with CD or without CD (controls) in Europe. The contribution of rare variants was assessed by high-throughput sequencing of 4750 individuals, including 660 early-onset and/or familial cases among the 2390 patients with CD. Variants were expressed from vectors in SW480 or HeLa cells and functions of their products were analyzed in immunofluorescence, luciferase, immunoprecipitation, and immunoblot assays. RESULTS: We reproduced the association of the interleukin 10 locus with CD (P = .007), although none of the significantly associated variants modified the coding sequence of interleukin 10. We found XIAP to be significantly enriched for rare coding mutations in patients with CD vs controls (P = .02). We identified 4 previously unreported missense variants associated with CD. Variants in XIAP cause the PID X-linked lymphoproliferative disease type 2, yet none of the carriers of these variants had all the clinical features of X-linked lymphoproliferative disease type 2. Identified XIAP variants S123N, R233Q, and P257A were associated with an impaired activation of NOD2 signaling after muramyl dipeptide stimulation. CONCLUSIONS: In a systematic analysis of variants in 23 PID-associated genes, we confirmed the association of variants in XIAP with CD. Further screenings for CD-associated variants and analyses of their functions could increase our understanding of the relationship between PID-associated genes and CD pathogenesis. [less ▲]

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See detailAnalysis of genetic variability and whole genome linkage of whole-brain, subcortical, and ependymal hyperintense white matter volume.
Kochunov, Peter; Glahn, David; Winkler, Anderson ULiege et al

in Stroke (2009), 40(12), 3685-90

BACKGROUND AND PURPOSE: The cerebral volume of T2-hyperintense white matter (HWM) is an important neuroimaging marker of cerebral integrity. Pathophysiology studies identified that subcortical and ... [more ▼]

BACKGROUND AND PURPOSE: The cerebral volume of T2-hyperintense white matter (HWM) is an important neuroimaging marker of cerebral integrity. Pathophysiology studies identified that subcortical and ependymal HWM are produced by 2 different mechanisms but shared a common risk factor: high arterial pulse pressure. Recent studies have demonstrated high heritability of the whole-brain HMW volume and reported significant and suggestive evidence of genetic linkage. We performed heritability and whole-genome linkage analysis to replicate previous reported findings and to study shared genetic variance, and possible overlap for specific loci, between subcortical and ependymal HWM volumes in a population of healthy Mexican Americans. METHODS: The volumes of subcortical and ependymal HWM regions were measured from high-resolution (1 mm(3)), 3-dimensional fluid-attenuated inversion recovery images acquired for 459 (283 females, 176 males) active participants in the San Antonio Family Heart Study. Subjects ranged in age from 19 to 85 years of age (47.9+/-13.5 years) and were part of 49 families (9.4+/-8.5 individuals per family). RESULTS: The volumes of whole-brain, subcortical, and ependymal HWM were highly heritable (h(2)=0.72, 0.66, and 0.73, respectively). The subcortical and ependymal HWM volumes shared 21% of genetic variability indicating significant pleiotropy. Genomewide linkage analysis showed only a suggestive bivariate linkage for subcortical and ependymal HWM volumes (log of odds=2.12) on chromosome 1 at 288 cM. CONCLUSIONS: We replicated previous findings of high heritability for the whole-brain HWM volume. We also showed that subcortical and ependymal volume shared a significant portion of genetic variability and the bivarate linkage analysis produced a suggestive linkage near the locus previously identified in a study of whole-brain HWM volume and arterial pulse pressure. [less ▲]

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See detailAnalysis of genetic variation in sorghum (Sorghum bicolor (L.) Moench) genotypes with various agronomical traits using SPAR methods
Satish, Lakkakula; Shilpha, Jayabalan; Pandian, Subramani et al

in Gene (2015), 576

Genetic variation among 45 genotypes of sorghum (Sorghum bicolor L.) representing seven subpopulations was assessed using three single primer amplification reaction (SPAR) methods viz., inter-simple ... [more ▼]

Genetic variation among 45 genotypes of sorghum (Sorghum bicolor L.) representing seven subpopulations was assessed using three single primer amplification reaction (SPAR) methods viz., inter-simple sequence repeat (ISSR), random amplified polymorphic DNA (RAPD) and directed amplification of minisatellite-region DNA (DAMD). Totally 15 ISSR, 8 RAPD and 7 DAMD primers generated 263 amplification products, accounting for 84.6% polymorphism across all the genotypes. The Mantel's test of correlation revealed the best correlation between ISSR and cumulative data with a correlation coefficient (r) of 0.84. Assessment of population diversity indicated that the maximum intra population genetic diversity was recorded among high FeZn lines (HFL) having maximum values of Nei's genetic diversity (h) (0.244), Shannon information index (I) (0.368) and the percentage of polymorphic loci (Pp) (72.65%) while the corresponding lowest values of 0.074, 0.109 and 17.95% respectively were observed among the members of MDT subpopulation. The mean coefficient of gene differentiation (GST) and the gene flow (Nm) between populations were observed to be 0.396 and 0.7680 respectively. The analysis of molecular variance (AMOVA) suggested that maximum genetic variation exists within populations (95%) than among populations (5%). Thus the information obtained from this study could be utilized in sorghum breeding programmes for the development of varieties with improved nutrition and agronomic values in future. [less ▲]

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See detailAnalysis of genetic variation in the Belgian Blue Cattle Breed using DNA sequence polymorphism at the growth hormone, low density lipoprotein receptor, -subunit of glycoprotein hormones and thyroglobulin loci
Hilbert, P.; Marcotte, F.; Schwers, A. et al

in Animal Genetics (1989), 20

New DNA sequence polymorphisms were identified at four bovine autosomal loci: growth hormone, low density lipoprotein receptor, alpha-subunit of glycoprotein hormones and thyroglobulin. Assuming ... [more ▼]

New DNA sequence polymorphisms were identified at four bovine autosomal loci: growth hormone, low density lipoprotein receptor, alpha-subunit of glycoprotein hormones and thyroglobulin. Assuming independent assortment between these polymorphisms, the probabilities to be heterozygous at these four loci are 0.48, 0.36, 0.10 and 0.77 respectively, within the Belgian Blue Cattle breed (BBCB). Nucleotide diversity was estimated, showing that animals from the BBCB are heterozygous for 1/1450 nucleotides, a value significantly lower than the 1/500 value found in man. Moreover, we have estimated that the mutation rate at the cytosines of CG dinucleotides is about 10 times higher than that for other nucleotides. [less ▲]

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See detailAnalysis of Geological Factors Involved In The Seismic Triggering of Landslides In Kyrgyzstan. Part A: Modelling Ofground Motion Dynamics
Havenith, Hans-Balder ULiege; Vanini, M; Jongmans, D et al

in EGS General Assembly Conference Abstracts (2002)

Abstract: The destructive effects of amplified ground motions on hills or mountain crests came first to light by the analysis of structural damage distribution patterns related to strong earthquakes. In ... [more ▼]

Abstract: The destructive effects of amplified ground motions on hills or mountain crests came first to light by the analysis of structural damage distribution patterns related to strong earthquakes. In order to better understand the origin of these so-called topographical effects, many efforts were and are still spent on collecting experimental data and on numerical modelling. Much less attention has, however, been paid to the impact of topographical effects on ground failure, while links between the two are regularly reported. The following ... [less ▲]

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See detailAnalysis of Geological Factors Involved In The Seismic Triggering of Landslides In Kyrgyzstan. Part B: Modelling Oflarge Deformation
Havenith, Hans-Balder ULiege; Jongmans, Denis

in EGS General Assembly Conference Abstracts (2002)

Abstract: Site specific amplification effects are experimentally determined on the basis of weak ground motions and related simulations are generally realised in the visco-elastic domain since the ... [more ▼]

Abstract: Site specific amplification effects are experimentally determined on the basis of weak ground motions and related simulations are generally realised in the visco-elastic domain since the mechanical behaviour can be considered as linear. on the other hand, strong shaking caused by large earthquakes often induces non-linear effects, ie modification of the ground motion behaviour due to increasing strains and the appearance of plasticity. Therefore, predictive modelling of large deformations involves the introduction of plastic ... [less ▲]

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See detailAnalysis of glucosinolates and their breakdown compounds
Wathelet, Jean-Paul ULiege

Conference (2004)

Glucosinolates are a class of ca. 120 secondary plant metabolites generally found in Brassicaceae. These compounds have a similar structure characterised by a common part containing a beta thioglucose ... [more ▼]

Glucosinolates are a class of ca. 120 secondary plant metabolites generally found in Brassicaceae. These compounds have a similar structure characterised by a common part containing a beta thioglucose coupled with a sulfonated oxim group and by a variable organic side chain constituted with alkyl, alcenyl, hydroxy-alcenyl, aryl, indolyl, sulfinyl, sulfonyl or thio residues. Present in high or low level (00 varieties) in rapeseed/canola seeds and in rapeseed/canola meals, these molecules are easily broken down during animal digestion, leading to compounds with detrimental and antinutritional characteristics. They are known to interfere with the thyroid and to damage vital organs (Fenwick et al., 1983). [less ▲]

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See detailAnalysis of glucosinolates and their breakdown compounds
Wathelet, Jean-Paul ULiege

in Rosliny Oleiste-Oilsed Crops (2004), XXV

Glucosinolates are a class of ca. 120 secondary plant metabolites generally found in Brassicaceae. These compounds have a similar structure characterised by a common part containing a beta thioglucose ... [more ▼]

Glucosinolates are a class of ca. 120 secondary plant metabolites generally found in Brassicaceae. These compounds have a similar structure characterised by a common part containing a beta thioglucose coupled with a sulfonated oxim group and by a variable organic side chain constituted with alkyl, alcenyl, hydroxy-alcenyl, aryl, indolyl, sulfinyl, sulfonyl or thio residues. Present in high or low level (00 varieties) in rapeseed/canola seeds and in rapeseed/canola meals, these molecules are easily broken down during animal digestion, leading to compounds with detrimental and antinutritional characteristics. They are known to interfere with the thyroid and to damage vital organs . [less ▲]

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See detailAnalysis of health needs of a hospital staff
Muller, Michel ULiege; Vandoorne, Chantal ULiege; Mairiaux, Philippe ULiege

Conference (1999, April 21)

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See detailAnalysis of hedge fund performance
Capocci, Daniel; Hübner, Georges ULiege

in Journal of Empirical Finance (2004), 11(1), 55-89

Using one of the largest hedge fund databases ever used (2796 individual funds including 801 dissolved), we investigate hedge funds performance using various asset pricing models, including an extension ... [more ▼]

Using one of the largest hedge fund databases ever used (2796 individual funds including 801 dissolved), we investigate hedge funds performance using various asset pricing models, including an extension of Carhart's (1997) specification combined with the Fama and French (1998) and Agarwal and Naik (2002) models and a new factor that takes into account the fact that some hedge funds invest in emerging bond markets. This addition is particularly suitable for more than half of the hedge funds categories, and for all funds in general. The performance of hedge funds for several individual strategies and different subperiods, including the Asian Crisis period, indicates limited evidence of persistence in performance but not for extreme performers. [less ▲]

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See detailAnalysis of high frequency geostationary ocean colour data using DINEOF
Alvera Azcarate, Aïda ULiege; Vanhellemont, Quinten; Ruddick, Kevin et al

in Estuarine Coastal and Shelf Science (2015), 159

DINEOF (Data Interpolating Empirical Orthogonal Functions), a technique to reconstruct missing data, is applied to turbidity data obtained through the Spinning Enhanced Visible and Infrared Imager (SEVIRI ... [more ▼]

DINEOF (Data Interpolating Empirical Orthogonal Functions), a technique to reconstruct missing data, is applied to turbidity data obtained through the Spinning Enhanced Visible and Infrared Imager (SEVIRI) on board Meteosat Second Generation 2. The aim of this work is to assess if the tidal variability of the southern North Sea in 2008 can be accurately reproduced in the reconstructed dataset. Such high frequency data have not previously been analysed with DINEOF and present new challenges, like a strong tidal signal and long night-time gaps. An outlier detection approach that exploits the high temporal resolution (15 min) of the SEVIRI dataset is developed. After removal of outliers, the turbidity dataset is reconstructed with DINEOF. In situ Smartbuoy data are used to assess the accuracy of the reconstruction. Then, a series of tidal cycles are examined at various positions over the southern North Sea. These examples demonstrate the capability of DINEOF to reproduce tidal variability in the reconstructed dataset, and show the high temporal and spatial variability of turbidity in the southern North Sea. An analysis of the main harmonic constituents (annual cycle, daily cycle, M2 and S2 tidal components) is performed, to assess the contribution of each of these modes to the total variability of turbidity. The variability not explained by the harmonic fit, due to the natural processes and satellite processing errors as noise, is also assessed. [less ▲]

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See detailAnalysis of historical grating spectra: Jungfraujoch atmospheric database extended back to 1977
Demoulin, Philippe ULiege; Roland, Ginette; Bader, Whitney ULiege et al

Conference (2011, November 10)

Historical solar spectra recorded at the Jungfraujoch station with a high-resolution grating spectrometer have been re-analyzed to derive total columns of a series of atmospheric gases. This instrument ... [more ▼]

Historical solar spectra recorded at the Jungfraujoch station with a high-resolution grating spectrometer have been re-analyzed to derive total columns of a series of atmospheric gases. This instrument, built and operated by the University of Liège (Belgium), was used in the Sixties and Seventies to record two solar spectrum atlases extending from the near-UV to the near-IR. From 1977 to 1989, it was also regularly used to record narrow spectral intervals in the mid-infrared, encompassing absorption lines of gases of atmospheric interest, e.g. CH4, HF, HCl, H2O, N2O, NO2, C2H6, O3 and CO. More than 10 thousand spectra were recorded during this period. The total columns derived from these grating spectra have been combined with the FTIR columns derived at the Jungfraujoch since the mid-1980s, in order to derive the temporal evolution of various target gases for the period 1977-2011. [less ▲]

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See detailAnalysis of HVAC indoor terminal units by using T-Q diagram : an experimental study
Ajaji, Youness; Andre, Philippe ULiege

in Heiselberg, Per (Ed.) CLIMA 2016 - proceedings of the 12th REHVA World Congress : volume 10. (2016, May)

The T-Q diagram is a widely used tool in the industry to optimize the design and the number of heat exchangers in a process. The principle consists in minimizing the quantity ∫TdQ in WK called entransy ... [more ▼]

The T-Q diagram is a widely used tool in the industry to optimize the design and the number of heat exchangers in a process. The principle consists in minimizing the quantity ∫TdQ in WK called entransy dissipation. We performed an experimental study in climatic chamber in order to apply the T-Q diagram method for the choice of the best indoor terminal device in an office submitted to a summer climate in Brussels and for the choice of the operating parameters water flow rate and water temperature. We tested four terminal units coupled to a cooling water tank by using a reversible air-water chiller: a mixing ventilation, a displacement ventilation, the mixing ventilation combined with a low inertia hydronic radiant floor, the displacement ventilation combined with the low inertia hydronic radiant floor. The tests were performed under stationary conditions. We plot the T-Q diagram and we assessed the entransy dissipations for each system and various operating parameters. We measured thermal comfort within the climatic chamber. Tests showed that air systems were less efficient than ventilation combined with radiant floor and that the combination of displacement ventilation with radiant floor was the best system. The study also showed that entransy dissipation values represented the real quality of the indoor terminal units. [less ▲]

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See detailAnalysis of hybrid hydraulic vehicles and comparison with hybrid electric vehicles using batteries or super capacitors
Louvigny, Yannick ULiege; Nzisabira, Jonathan; Duysinx, Pierre ULiege

Conference (2008, March 12)

Hybrid Hydraulic Vehicle (HHV) technology is an alternative solution to classical Hybrid Electric Vehicles (HEV). The authors’s previous studies of hybrid hydraulic systems clearly demonstrated that HHV ... [more ▼]

Hybrid Hydraulic Vehicle (HHV) technology is an alternative solution to classical Hybrid Electric Vehicles (HEV). The authors’s previous studies of hybrid hydraulic systems clearly demonstrated that HHV can lead to fuel savings even though smaller than HEV. Hydraulic energy recovery systems are well adapted for heavy urban vehicles with frequent starts and stops because the weight penalty of the hydraulic system can be mitigated while taking benefit of their high specific power property for power assist. This recent work investigates and compares, from an economical and technical point of view, both HHV and HEV buses using batteries or super capacitors as energy storage systems. The fuel consumption of different hybrid busses is simulated using ADVISOR on the basis of three European SORT driving cycles. The results show that HHV and HEV with super capacitors can not rival from the consumption point of view with the HEV using batteries as energy storage system. But they can be economically interesting because of their lower cost and the longer service life of their energy storage system. [less ▲]

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See detailAnalysis of hydraulic hybrid vehciles and economical comparison with hybrid electric vehicles
Louvigny, Yannick ULiege; Nzisabira, Jonathan; Duysinx, Pierre ULiege

Conference (2007, June 01)

Hybrid Hydraulic Vehicle (HHV) technology is an alternative to HEV. This technology deserves new attention because of recent development in reversible hydraulic motor pumps with high efficiency. The HHV ... [more ▼]

Hybrid Hydraulic Vehicle (HHV) technology is an alternative to HEV. This technology deserves new attention because of recent development in reversible hydraulic motor pumps with high efficiency. The HHV technology is based on parallel architecture of motor assist systems. A first preliminary study investigated the fuel consumption of a passenger car, a SUV and an urban bus. It clearly demonstrated that the fuel efficiency benefits are the better for heavy vehicles with frequent stops and starts. The second part of the work then compared both HEV and HHV buses. The fuel consumption is simulated using ADVISOR on the basis of 3 SORT driving cycles. The results showed that the HHV are penalized by his weight but they can be economically interesting because of the lower cost and longer life time of the hydraulic system. [less ▲]

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See detailAnalysis of incomplete data
Molenberghs, G.; Beunkens, C.; Jansen, I. et al

in 'SAS System for Clinical Trials II (2005)

Detailed reference viewed: 10 (2 ULiège)