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See detailEffect of cholecalciferol recommanded daily allowances on vitamin D status and fibroblast growth factor-23: an observational study in acute burn patients
ROUSSEAU, Anne-Françoise ULg; DAMAS, Pierre ULg; LEDOUX, Didier ULg et al

in Burns : Journal of the International Society for Burn Injuries (2014), 40(5), 865-70

OBJECTIVE: Burn patients are at risk of hypovitaminosis D. Optimal vitamin D (VD) intakes are not defined in burn nutrition guidelines and studies mostly focused on ergocalciferol (VD2) supplementation in ... [more ▼]

OBJECTIVE: Burn patients are at risk of hypovitaminosis D. Optimal vitamin D (VD) intakes are not defined in burn nutrition guidelines and studies mostly focused on ergocalciferol (VD2) supplementation in burn children. Aim of our study was to describe adult burns VD status, to measure effects of our cholecalciferol (VD3) supplementation on VD metabolism during acute burn care, and to assess correlation between FGF23 and C-reactive protein (CRP). DESIGN: Cohort study. METHODS: From March 2012 to January 2013, patients >18 years, admitted within 24h after injury with burn surface area (BSA) ≥10% were included. Patients daily received VD3 from oral or enteral nutrition (400-600IU) and from oral or intravenous multivitamin complex (200-220IU). Serum levels of 25(OH)-D, 1-25(OH)2-D, 3rd generation PTH, C-terminal FGF23, total calcium, phosphate, albumin and CRP were measured at admission (D0) and every week during 4 weeks of follow-up. Data are expressed as percentage or median (min-max). Paired data were compared using Wilcoxon test. Correlation between CRP and FGF23 was assessed using nonparametric Spearman test. A p value <0.05 was considered to be statistically significant. RESULTS: We initially included 24 patients. Median age and BSA were, respectively, 46 [19-86] years and 15 [10-85]%. At D0, 75% presented a VD insufficiency (25(OH)-D 21-29ng/ml) and 17% presented a deficiency (25(OH)-D ≤20ng/ml). We followed 12 patients until day 28: 25(OH)-D was unchanged while 1-25(OH)2-D and FGF23 decreased without reaching significance. We observed a significant positive correlation between FGF23 and CRP (r=0.59, 95% CI: 0.22-0.82, p=0.0032). CONCLUSIONS: Most of our adult burns presented hypovitaminosis D regardless of age. Nutrition supplemented with low dose of VD3 (intakes reaching recommended daily allowances) was insufficient to correct 25(OH)-D level. Moreover, an interesting correlation between CRP and FGF23 was found. [less ▲]

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See detailEffect of Cholesterol and Fatty Acids on the Molecular Interactions of Fengycin with Stratum Corneum Mimicking Lipid Monolayers.
Eeman, Marc; Francius, G.; Dufrêne, Yves et al

in Langmuir : the ACS journal of surfaces and colloids (2009), 25

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See detailEffect of chronic airway inflammation and exercise on pulmonary and systemic antioxidant status of healthy and heaves-affected horses
Kirschvink, Nathalie; Smith, N.; Fievez, Laurence ULg et al

in Equine Veterinary Journal (2002), 34(6), 563-571

In heaves-affected horses the relation between oxidant status, airway inflammation (AI) and pulmonary function (PF) is unknown. The oxidant status of blood and pulmonary epithelial lining fluid (PELF) of ... [more ▼]

In heaves-affected horses the relation between oxidant status, airway inflammation (AI) and pulmonary function (PF) is unknown. The oxidant status of blood and pulmonary epithelial lining fluid (PELF) of healthy (H, n = 6) and heaves-affected horses in clinical remission (REM, n = 6) and in crisis (CR, n = 7) was assessed at rest, during and after standardised exercise test by measurement of reduced and oxidised glutathione, glutathione redox ratio [GRR%]; uric acid and 8-epi-PGF2alpha. Oxidant status was related to PF parameters (mechanics of breathing and arterial blood gas tension) and Al parameters (bronchoalveolar lavage [BAL] neutrophil % and AI score). Haemolysate glutathione was significantly different between groups and was correlated with PF and AI parameters; GRR in PELF was increased during CR and was correlated with PF and AI parameters. Exercise induced an increase of plasma uric acid that was significantly higher both in REM and CR. PELF 8-epi-PGF2alpha was significantly increased in CR and correlated with PF and AI parameters. These results suggest that oxidative stress occurring in heaves is correlated with PF and AI and may be locally assessed by PELF glutathione status, uric acid and 8-epi-PGF2alpha. Systemic repercussions are reflected by assay of GSH in resting horses and by uric acid in exercising horses. [less ▲]

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See detailEffect of Chronic confinement stress on growth, survival, blood cortisol and glucose of perch (Perca fluviatilis)
Rougeot, Carole ULg; Tomson, Thomas; Vandecan, Michaël et al

Poster (2011)

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See detailEffect of clay modification on the mechanism of local deformations in PA6 nanocomposites
Dominkovics, Zita; Naveau, Elodie ULg; Jérôme, Christine ULg et al

in Macromolecular Materials and Engineering (2013), 298(7), 796-805

PA nanocomposites are prepared from clays organophilized with a phosphonium and an ammonium salt, and sodium montmorillonite is used as reference. The analysis of mechanical and micromechanical properties ... [more ▼]

PA nanocomposites are prepared from clays organophilized with a phosphonium and an ammonium salt, and sodium montmorillonite is used as reference. The analysis of mechanical and micromechanical properties of the composites reveal that several micromechanical deformation processes occur in the PA/MMT composites. The matrix cavitates at relatively small stress. Processes related to non-exfoliated clay structural units are initiated at larger stresses. Sound is emitted mainly by the fracture of particles, but debonding may also occur. The plastic deformation of the matrix dominates at larger stresses and deformations. The various local deformations are independent of each other and composite properties are not determined by silicate related processes but by the deformation of the matrix. [less ▲]

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See detailEffect of clay modification on the structure and mechanical properties of polyamide-6 nanocomposites
Naveau, Elodie ULg; Dominkovics, Zita; Detrembleur, Christophe ULg et al

in European Polymer Journal (2011), 47(1), 5-15

Polyamide-6 nanocomposites were prepared from a new phosphonium organoclay obtained at pilot scale in supercritical carbon dioxide (scCO2) and a commercially available ammonium modified-silicate. The ... [more ▼]

Polyamide-6 nanocomposites were prepared from a new phosphonium organoclay obtained at pilot scale in supercritical carbon dioxide (scCO2) and a commercially available ammonium modified-silicate. The composites were homogenised by twin-screw extrusion, then specimens for testing were prepared by injection moulding. The clay content of the composites was varied from 0 to 7 vol% in 7 steps. The clays were characterised in detail; they differed in their surface coverage and gallery structure, while their particle size was similar and their surface energy differed only slightly. X-ray diffraction, electronic microscopy and rheology were used for the characterisation of composite structure. Different gallery structure of the clays led to dissimilar extent of exfoliation. The phosphonium organoclay exfoliated better in PA than the silicate treated with the ammonium salt in spite of its smaller surface coverage. The nanocomposites showed the usual complex structure: besides individual platelets and intercalated stacks, large particles were also present and the development of a silicate network could be shown at large clay contents. Quantitative determination of the extent of reinforcement revealed two determining factors: contact surface and strength of interaction. The first increases with exfoliation, but the latter decreases as an effect of organophilisation. The extent of exfoliation was also estimated quantitatively, and the calculation confirmed the results of qualitative evaluation showing larger extent of exfoliation for the scCO2-prepared phosphonium clay. [less ▲]

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See detailEffect of clenbuterol on animal performances, plasma hormones and metabolites in fattening cattle
Dufrasne, Isabelle ULg; Istasse, Louis ULg; Van Eenaeme, Christian ULg et al

in Proceedings of the 40th annual meeting of the EAAP (1989)

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See detailEffect of climate change on flood risk along river Ourthe
Dewals, Benjamin ULg; Ernst, Julien ULg; Pirotton, Michel ULg

Conference (2008, November 12)

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See detailEffect of climate change on flood risk along river Ourthe
Dewals, Benjamin ULg; Ernst, Julien ULg

Conference (2008, November 12)

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See detailThe Effect of Clonidine Infusion on Distribution of Regional Cerebral Blood Flow in Volunteers
Bonhomme, Vincent ULg; Maquet, Pierre ULg; Phillips, Christophe ULg et al

in Anesthesia and Analgesia (2008), 106(3), 899-909

BACKGROUND: Through their action on the locus coeruleus, alpha2-adrenoceptor agonists induce rapidly reversible sedation while partially preserving cognitive brain functions. Our goal in this ... [more ▼]

BACKGROUND: Through their action on the locus coeruleus, alpha2-adrenoceptor agonists induce rapidly reversible sedation while partially preserving cognitive brain functions. Our goal in this observational study was to map brain regions whose activity is modified by clonidine infusion so as to better understand its loci of action, especially in relation to sedation. METHODS: Six ASA I-II right-handed volunteers were recruited. Electroencephalogram (EEG) was monitored continuously. After a baseline H2(15)O activation scan, clonidine infusion was started at a rate ranging from 6 to 10 microg x kg(-1) x h(-1). A sequence of 11 similar scans was then performed at 8 min intervals. Plasma clonidine concentration was measured. Using statistical parametric mapping, we sought linear correlations between normalized regional cerebral blood flow (rCBF), an indicator of regional brain activity, and plasma clonidine concentration or spindle EEG activity. RESULTS: Clonidine induced clinical sedation and EEG patterns (spindles) comparable to early stage nonrapid eye movement sleep. A significant negative linear correlation between clonidine concentration and rCBF or spindle activity was observed in the thalamus, prefrontal, orbital and parietal association cortex, posterior cingulate cortex, and precuneus. CONCLUSIONS: The EEG patterns and decreases in rCBF of specific brain regions observed during clonidine-induced sedation are similar to those of early stage nonrapid eye movement sleep. Patterns of deactivated brain regions are also comparable to those observed during general anesthesia or vegetative state, reinforcing the hypothesis that alterations in the activity of a common network occur during these modified conscious states. [less ▲]

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See detailEffect of Clonidine on Propofol and Remifentanil requirements using BIS score and the A-line ARX (AAI) index during laparoscopic gastric bypass in obese patients
Rosant, Séverine; Nkiko, Gédéon; Lauwick, Séverine ULg et al

in Acta Anaesthesiologica Belgica (2008, June 14), 59(3), 228

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See detailEffect of CO2 activation of carbon xerogels on the adsorption of methylene blue
Páez Martínez, Carlos ULg; Contreras, M. S.; Léonard, Angélique ULg et al

in Adsorption (2012), 18(3-4), 199-211

The effect of physical activation with CO2 of carbon xerogels, synthesized by pyrolysis of a resorcinolformaldehyde aqueous gel, on the adsorption capacities of Methylene Blue (MB) was studied. The ... [more ▼]

The effect of physical activation with CO2 of carbon xerogels, synthesized by pyrolysis of a resorcinolformaldehyde aqueous gel, on the adsorption capacities of Methylene Blue (MB) was studied. The activation with CO2 lead to carbon materials with micropore volumes ranging from 0.28 to 0.98 cm³/g -1 C. MB-adsorption isotherm studies showed that the increase of micropore volume and corresponding surface area led to: (i) a significant improvement in the capacity of MB-adsorption at monolayer coverage, from 212 to 714 mgg -1 C, and (ii) an increase of the binding energy related to Langmuir isotherm constant up to 45 times greater than those of commercial microporous activated carbons used as reference (NORIT R2030, CALGON BPL and CALGON NC35). It is proposed that the increase of the binding energy results from chemical cleaning of the O-groups onto carbon surface as a consequence of CO2-activation, increasing the π-π interaction between MB and graphene layers of the carbon xerogels. Finally, a series of batch kinetics were performed to investigate the effect of CO2-activation conditions on the mechanism of MB-adsorption. Experimental data were fitted using pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models. From pseudo-second-order kinetic model, one observes an increase in the initial rate of MB-adsorption from 0.019 to 0.0565 min -1, by increasing the specific surface area from 630 to 2180 m²/g -1 C via CO2-activation. Depending on the activation degree of the carbons, two different mechanisms control the MB-adsorption rate: (i) at low activation degree, the intraparticle diffusion is the rate-limiting phenomenon, whereas (ii) at high activation degree, the reactions occurring at the solid/liquid interface are the rate-limiting steps. © 2012 Springer Science+Business Media, LLC. [less ▲]

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See detailEffect of CO2 concentration on suspended particle dynamics during a mesocosm bloom experiment (Peece II)
Engel, Anja; Bellerby, R.; Delille, Bruno ULg et al

Conference (2007, April)

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See detailEFFECT OF CO2 INJECTION IN THE COMBUSTION AIR ON THE PERFORMANCE OF A HOT WATER DOMESTIC FUEL OIL BOILER
Milovanovic, Nebojsa; Ngendakumana, Philippe ULg

Conference (2000, August)

In order to investigate the effect of CO2 addition in the combustion air of a yellow flame burner, tests have been performed during which different volume flow rates of CO2 have been injected. For all the ... [more ▼]

In order to investigate the effect of CO2 addition in the combustion air of a yellow flame burner, tests have been performed during which different volume flow rates of CO2 have been injected. For all the tests performed, the burner consumption and the oxygen mole fraction in the flue gas have been kept quite constant, say at about 240 kW and 1.8 % (on dry basis) respectively. For the interpretation of the flame radiation results, tests have also been performed with N2 injection. The results gathered (for CO2 and N2 addition up to 4.8 % and 7.4 % in volume respectively) show that the thermal efficiency and the CO emission of the boiler are not affected. For small amounts of CO2 or N2 volume flow rates, there is a slight decrease of the NOx emission and the flame radiation. If the quantity of the additive is increased above a critical value, the flame becomes unstable and one observes first a sudden increase of the NOx emission and the flame radiation and then a decrease. That sudden increase is explained by the change of the flame shape and geometry. [less ▲]

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See detailEffect of Cognitive Load on Working Memory Forgetting in Aging
Baumans, Christine ULg; Adam, Stéphane ULg; Seron, Xavier

in Experimental Psychology (2012), 22

Detailed reference viewed: 71 (16 ULg)