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Peer Reviewed
See detailComparison of gene expression in canine sino-nasal aspergillosis and idiopathic lymphoplasmacytic rhinitis: a microarray study
Vanherberghen, Morgane ULg; Bureau, Fabrice ULg; Peters, IR et al

in Proceedings of the 19th Annual ECVIM-CA Congress (2009)

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See detailComparison of genetic association strategies in the presence of rare alleles
Mahachie John, Jestinah ULg; Cattaert, Tom ULg; De Lobel, Lizzy et al

in BMC Proceedings (2011)

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See detailComparison of GPS-derived vTEC over Cyprus with NeQuick Model
Haralambous, Haris; Bidaine, Benoît ULg

in Doherty, P.; Hernández-Pajares, M.; Juan, J.-M. (Eds.) et al The International Beacon Satellite Symposium BSS2010 (2010, June)

This paper presents a comparison of ionospheric vertical total electron content (vTEC) values evaluated from Nicosia (35.1 N, 33.4 E) ground-based GPS station in Cyprus and the corresponding predictions ... [more ▼]

This paper presents a comparison of ionospheric vertical total electron content (vTEC) values evaluated from Nicosia (35.1 N, 33.4 E) ground-based GPS station in Cyprus and the corresponding predictions with the latest version of the NeQuick model during periods of low (2008), and high (2001) solar activity for different seasons. According to the study the NeQuick predictions generally underestimate vTEC values during high solar activity periods and overestimate vTEC values during low solar activity periods. [less ▲]

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See detailComparison of ground-based remote sensing and in-situ observations of CO, CH4 and O3, accounting for representativeness uncertainty
Henne, S.; Steinbacher, M.; Mahieu, Emmanuel ULg et al

Conference (2013, April)

The EC project NORS (Demonstration Network Of ground-based Remote Sensing Observations in support of the GMES Atmospheric Service) aims at demonstrating the value of ground-based remote sensing data for ... [more ▼]

The EC project NORS (Demonstration Network Of ground-based Remote Sensing Observations in support of the GMES Atmospheric Service) aims at demonstrating the value of ground-based remote sensing data for quality assessment and improvement of the GMES products. As part of NORS CO, CH4, O3 and NO2 tropospheric products as obtained by ground-based remote sensing within the Network for the Detection of Atmospheric Composition Change (NDACC) are compared to continuous surface in-situ measurements that are reported on common international reference scales within the Global Atmospheric Watch (GAW) Programme. However, a direct comparison between the different methods is hindered by different sampling volumes, introducing uncertainties due to representativeness. Here we present a novel method that utilises high-resolution, backward Lagrangian particle dispersion modelling to characterise the transport history of different sampling volumes. Sampling volumes are defined as infinitesimally small point volumes for the in-situ observations and as separate profile segments with horizontal and vertical extent for the remote sensing observations. The characterisation is then used (a) to filter times for which a direct comparison between in-situ and remote sensing data is unfavourable (large representativeness uncertainty) and (b) to construct vertical profiles from the in-situ observations, taking additional information from large scale atmospheric composition models into account. These so called “in-situ” profiles are supposed to be more comparable to the remote sensing profile as the surface value itself, while conserving the high accuracy information of the latter and projecting it onto the profile. Therefore, these profiles allow for a more direct comparison and validation of the remotely sensed profiles. The technique was first applied at two of the four NORS demonstration sites (Jungfraujoch, Switzerland and Izana, Spain) and to the comparison of remote sensing Fourier-transform infrared spectrometer (FTIR) measurements of CO, CH4, and O3 with the responding in-situ observations. While previous studies generally showed good agreement between the two kinds of observation, considerable amounts of scatter were evident. Selecting only situations with relatively small representativeness uncertainty reduces this scatter. Folding the “in-situ” profiles with the averaging kernels of the FTIR retrieval gives a more realistic comparison result that is not influenced by any a-priori assumptions. Results are also discussed with respect to season, time of day and weather type. [less ▲]

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See detailComparison of Heterogeneous Transport Processes Observed with Electrical Resistivity Tomography in Two Soils
Garré, Sarah ULg; Koestel, Johannes; Günther, Thomas et al

in Vadose zone journal (2010), 9(2), 336-349

Preferential flow in soils can manifest itself in several ways. To illustrate this, we analyzed solute transport during a step tracer experiment in two soils expected to differ in their governing ... [more ▼]

Preferential flow in soils can manifest itself in several ways. To illustrate this, we analyzed solute transport during a step tracer experiment in two soils expected to differ in their governing transport processes: a loamy sand and a silty soil. By combining electrical resistivity tomography (ERT), time domain reflectometry, and effluent measurements, we observed different preferential flow phenomena. The transport process was characterized using voxel- and column-scale effective convective–dispersive equation (CDE) parameters, local velocities, and leaching surfaces. At the column scale, transport in the loamy sand was dominated by a homogenous convective–dispersive transport behavior, but at the scale of the voxel, preferential transport was observed. Transport in the silty soil was considerably more heterogeneous. Preferential flow was identified using ERT, voxel- and column-scale effective CDE parameters, local velocities, and leaching surfaces. In these soils, a clear influence of soil layering on solute transport was observed. [less ▲]

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See detailComparison of high spatial resolution trace metal distributions with model simulations for surface waters of the Gulf of Cadiz
Beckers, Jean-Marie ULg; Achterberg, Eric; Braungardt, Charlotte

in Estuarine Coastal & Shelf Science (2007), 74(4), 599-609

A multidisciplinary study in the Gulf of Cadiz is revisited, using additional diagnostic modelling tools. The dissolved trace metal (Cu, Ni, Zn, Cc) distributions in the Gulf of Cadiz are analysed using ... [more ▼]

A multidisciplinary study in the Gulf of Cadiz is revisited, using additional diagnostic modelling tools. The dissolved trace metal (Cu, Ni, Zn, Cc) distributions in the Gulf of Cadiz are analysed using modelled tracer evolutions, field observations and the concept of tracer ages. This Study shows that a significant part of the observed metal distributions can be explained by the metal inputs of three river systems (Guadiana, Rio Tinto and Odiel. Guadalquivir) discharging into the Gulf of Cadiz, while the remainder of the signal is most likely associated with the benthic metal remobilisation along the shelf of this coastal region. (C) 2007 Elsevier Ltd. All rights reserved. [less ▲]

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See detailComparison of hindquarter metabolite uptakes in Belgian Blue double-muscled bulls at maintenance or during fattening.
Hornick, Jean-Luc ULg; Van Eenaeme, Christian ULg; Diez, Marianne ULg et al

in Journal of Animal Science (1997), 75(12), 3331-41

Metabolism of muscle growth in the hindquarter was investigated by the arterio-venous difference (AVD) technique in Belgian Blue double-muscled type bulls at maintenance or at fattening. The bulls were ... [more ▼]

Metabolism of muscle growth in the hindquarter was investigated by the arterio-venous difference (AVD) technique in Belgian Blue double-muscled type bulls at maintenance or at fattening. The bulls were fitted with an aortic ultrasonic blood flow probe and with catheters in the aorta and vena cava. They were offered a diet allowing for maintenance (MP) during a period of 15 d, at the end of which measurements were made over 3 d. Bulls were then given a fattening diet (FP) and the measurements were repeated. Arterial blood flow was approximately 1 L/min greater when the bulls were standing than when lying. Blood flow was 2 L/min higher during FP than during MP. The AVD and uptake of glucose were maximal at 1400 and 1600. Uptake of alpha-amino nitrogen decreased immediately after a meal. The increase in glucose from MP to FP fitted very well with the calculated energy needs for muscle growth. The AVD and uptake of alpha-amino nitrogen, total amino acids, and total nonessential amino acids were negative during MP and positive and significantly higher during FP. There was also a significant increase in AVD and uptake of essential and branched-chain amino acids when the bulls were changed from MP to FP. When changing from maintenance to fattening, the incremental glucose and amino acid hindquarter uptake provided energy and supply for muscle protein accretion, respectively. The level of alanine transamination was also sharply reduced. [less ▲]

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See detailComparison of horizontal and vertical advective CO2 fluxes at three forest sites
Feigenwinter, Christian; Bernhofer, Christian; Eichelmann, Uwe et al

in Agricultural and Forest Meteorology (2008), 148(1), 12-24

Extensive field measurements have been performed at three CarboEurope-Integrated Project forest sites with different topography (Renon/Ritten, Italian Alps, Italy; Wetzstein, Thuringia, Germany; Norunda ... [more ▼]

Extensive field measurements have been performed at three CarboEurope-Integrated Project forest sites with different topography (Renon/Ritten, Italian Alps, Italy; Wetzstein, Thuringia, Germany; Norunda, Uppland, Sweden) to evaluate the relevant terms of the carbon balance by measuring CO2 concentrations [CO2] and the wind field in a 3D multi-tower cube setup. The same experimental setup (geometry and instrumentation) and the same methodology were applied to all the three experiments. It is shown that all sites are affected by advection in different ways and strengths. Everywhere, vertical advection (F-VA) occurred only at night. During the day, F-VA disappeared because of turbulent mixing, leading to a uniform vertical profile of [CO2]. Mean F-VA was nearly zero at the hilly site (wetzstein) and at the flat site (Norunda). However, large, momentary positive or negative contributions occurred at the flat site, whereas vertical non-turbulent fluxes were generally very small at the hilly site. At the slope site (Renon), F-VA was always positive at night because of the permanently negative mean vertical wind component resulting from downslope winds. Horizontal advection also occurred mainly at night. It was positive at the slope site and negative at the flat site in the mean diurnal course. The size of the averaged non-turbulent advective fluxes was of the same order of magnitude as the turbulent flux measured by eddy-covariance technique, but the scatter was very high. This implies that it is not advisable to use directly measured quantities of the non-turbulent advective fluxes for the estimation of net ecosystem exchange (NEE) on e.g. an hourly basis. However, situations with and without advection were closely related to local or synoptic meteorological conditions. Thus, it is possible to separate advection affected NEE estimates from fluxes which are representative of the source term. However, the development of a robust correction scheme for advection requires a more detailed site-specific analysis of single events for the identification of the relevant processes. This paper presents mean characteristics of the advective CO2 fluxes in a first site-to-site comparison and evaluates the main problems for future research. (c) 2007 Elsevier B.V. All rights reserved. [less ▲]

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See detailComparison of HRGC-MS/MS and HRGC-HRMS results on environmental and food samples in some European laboraratories
Helen, Céline; Marchand, Philippe; Laplanche, Alain et al

in Organohalogen Compounds (2002)

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See detailComparison of Immune Reconstitution after Hematopoietic Stem Cell Transplantation with Flu-TBI versus TLI-ATG Conditioning
Hannon, Muriel ULg; Humblet-Baron, S.; Graux, C. et al

in Haematologica (2012), 97(Supplement 1), 180

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See detailComparison of Immune Reconstitution after Hematopoietic Stem Cell Transplantation with Flu-TBI versus TLI-ATG Conditioning
Hannon, Muriel ULg; Humblet-Baron, S.; Graux, C. et al

in Belgian Journal of Hematology (2013), Abstracts book(Supplement of 28th General Meeting of the Belgian Hematological Society), 38

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See detailComparison of Immune Reconstitution after Non-myeloablative Hematopoietic Cell Transplantation (HCT) with Flu-TBI versus TLI-ATG Conditioning
Hannon, Muriel ULg; Humblet-Baron, S.; Graux, C. et al

in Belgian Journal of Hematology (2011), Abstracts book(Supplement of 26th General Meeting of the Belgian Hematological Society), 8

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See detailComparison of impacts of dams on the annual maximum flow characteristics in three regulated hydrological regimes in Quebec (Canada).
Assani, A. A.; Stichelbout, E.; Roy, A. G. et al

in Hydrological Processes (2006)

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See detailComparison of impaired subcortico-frontal metabolic networks in normal aging, subcortico-frontal dementia, and cortical frontal demential
Garraux, Gaëtan ULg; Salmon, Eric ULg; Degueldre, Christian ULg et al

in Neuroimage (1999), 10(2), 149-162

Normal aging, progressive supranuclear palsy (PSP), and frontotemporal dementia (FTD) are characterized by different degrees of decline in frontal lobe functions. We used (18)FDG-PET and statistical ... [more ▼]

Normal aging, progressive supranuclear palsy (PSP), and frontotemporal dementia (FTD) are characterized by different degrees of decline in frontal lobe functions. We used (18)FDG-PET and statistical parametric mapping (SPM96) to compare relative subcorticofrontal metabolic impairment at rest in 21 healthy elderly subjects (HES), 20 PSP patients, and 6 FTD patients. When HES were compared to 22 healthy young subjects, widespread decrease in metabolism was observed in bilateral medial prefrontal areas including anterior cingulate cortices, in dorsolateral prefrontal areas, in left lateral premotor area, in Broca's area, and in left insula. In PSP compared to the 43 healthy subjects (HS), we observed subcorticofrontal metabolic impairment including both motor and cognitive neural networks. Impairment of functional connections between midbrain tegmentum and cerebellar, temporal and pallidal regions was demonstrated in PSP as compared to HS. When comparing FTD to HS, glucose uptake was primarily reduced in dorsolateral and ventrolateral prefrontal cortices and in frontopolar and anterior cingulate regions. There was also bilateral anterior temporal, right inferior parietal, and bilateral striatal hypometabolism. Finally, FTD showed more severe striatofrontal metabolic impairment than PSP, while mesencephalothalamic involvement was only observed in PSP. Our data suggest that subcorticofrontal metabolic impairment is distributed in distinct subcorticocortical networks in normal aging, PSP, and FTD. Subcorticofrontal dementia in PSP is related to hypometabolism in discrete frontal areas, which are probably disconnected from certain subcortical structures. The concept of subcortical dementia is reinforced by our data, which show disrupted functional connections between mesencephalon and cerebellar cortex, inferior and medial temporal regions, and pallidum. [less ▲]

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See detailComparison of Indicators to Evaluate the Resilience of Lab Scale Continuously Stirred Anaerobic Reactors Submitted to Biological Dysfunctions
Lemaigre, Sébastien; Adam, Gilles ULg; Goux, Xavier et al

Poster (2014, June 02)

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See detailComparison of inflammatory responses after off-pump and on-pump coronary surgery using surface modifying additives circuit
Quaniers, Janine ULg; Leruth, Julie ULg; Albert, Adelin ULg et al

in Annals of Thoracic Surgery (2006), 81(5), 1683-1690

Background. Cardiac surgery is followed by various degrees of inflammation, which have harmful consequences. Because of the central role of extracorporeal circulation ( EC), off- pump coronary bypass ... [more ▼]

Background. Cardiac surgery is followed by various degrees of inflammation, which have harmful consequences. Because of the central role of extracorporeal circulation ( EC), off- pump coronary bypass surgery is deemed preferable. Do different modalities of EC challenge this view? Methods. Four groups of similar patients underwent coronary surgery: ( group 1) on- pump, EC with closed surface modifying additives ( SMA) circuit and no pump suckers ( n = 20); ( group 2) on- pump, EC with open SMA circuit and pump suckers ( n = 20); ( group 3) off- pump ( beating heart) and heparin 3 mg/ kg ( n = 20); ( group 4) off- pump ( beating heart) and heparin 1 mg/ kg ( n = 20). Interleukins ( IL)- 6, IL- 8, IL- 10, myeloperoxidase, elastase, and terminal complex of the complement ( TCC) were analyzed at various times: at induction ( time I); after heparin ( time II); after complete revascularization ( time III); after protamine ( time IV); and 24 hours later ( time V). Results. The TCC was significantly higher in groups 1 and 2 at time III. The pattern of IL- 6 was the same for the four groups. No significant difference in myeloperoxydase content was noted; however, elastase was significantly higher in the two EC ( on- pump) groups. Conclusions. Except for the complement system and elastase, on- pump surgery with SMA- coated circuits did not elicit any greater inflammatory response than off-pump surgery. [less ▲]

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