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See detailINFLUENCE OF JUMPING STRATEGY ON KINETIC PARAMETERS
Jidovtseff, Boris ULg; Quievre, Jacques; Harris Nigel et al

in Journal of sports medicine and physical fitness (2014), 54

Aim: Different jumping strategies can be used during plyometric training. Understanding how manipulating variables such as the counter-movement, flexion amplitude, the drop and the load could influence ... [more ▼]

Aim: Different jumping strategies can be used during plyometric training. Understanding how manipulating variables such as the counter-movement, flexion amplitude, the drop and the load could influence neuromuscular adaptation would be beneficial for coaches and athletes. The purpose of this study was to analyze how these variations in the vertical jump influenced kinematic and kinetic parameters as measured by a force platform. Methods: Ten male subjects performed, eight kinds of vertical jumps on a force platform : (1) squat jump (SJ); (2) shallow counter-movement jump (S-CMJ); (3) natural counter-movement jump (N-CMJ); (4) deep counter-movement jump (D-CMJ); (5) loaded (20kg) counter-movement jump (20-CMJ); (6) shallow drop jump (S-DJ); (7) deep drop jump (D-DJ); (8) six consecutive jump test (6CJ). Customised Labview software was used to calculate time, displacement, velocity, acceleration, force, power, impulse and stiffness. After statistical analysis, jumping variables were grouped to achieve spécific training objectives. Results: The mechanical parameters were largely influenced by the jump strategy, all the deep jumps produced superior jump heights and concentric velocities as compared to the shallow jumps. The exercises associated with greater power outputs were the S-DJ (5386±1095w) and 6CJ (5795±1365w) that involved short impulse durations and very high accelerations. The greatest values of muscle stiffness were not recorded during the highest vertical jumps, meaning that stiffness is not critical for jumping high. Conclusion: This study gives an overview of what is changing when we manipulate jumping variables and instructions given to the athletes. Plyometric exercises should be carefully selected according to the sport and specific individual needs. [less ▲]

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See detailThe influence of laboratory-induced Meld score differences on liver allocation: more reality than myth.
Schouten, J. N.; Francque, S.; Van Vlierberghe, H. et al

in Clinical Transplantation (2012), 26(1), 62-70

Background: Liver allocation in Eurotransplant (ET) is based on the MELD score. Interlaboratory MELD score differences in INR and creatinine determination have been reported. The clinical implication of ... [more ▼]

Background: Liver allocation in Eurotransplant (ET) is based on the MELD score. Interlaboratory MELD score differences in INR and creatinine determination have been reported. The clinical implication of this observation has not been demonstrated. Methods: MELD scores were calculated in 66 patients with liver cirrhosis using bilirubin, creatinine, and INR analyzed in six liver transplant centers. Based on allocation results of ET, patients transplanted from December 2006 to June 2007 were divided according to MELD score in four groups. For each group, the influence of the match MELD on the probability of receiving a transplant was studied (Cox proportional hazards model). Results: Laboratory-dependent significant differences in MELD score were demonstrated. Cox proportional hazards model showed a significant association between MELD score and the probability of organ allocation. The unadjusted hazard ratio for receiving a liver transplant was significantly different between group 2 and group 4 (group 2: MELD 19–24; group 4: MELD > 30). Conclusion: Laboratory-dependent significant differences in MELD score were observed between the six transplant centers. We demonstrated a significant association between the MELD score and the probability of organ allocation. The observed interlaboratory variation might yield a significant difference in organ allocation in patients with high MELD scores. [less ▲]

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See detailInfluence of laminin and fibroblasts upon colony formation by B16 melanoma cells
De Leval, Laurence; Leyh, Philippe; Grégoire, Dominique et al

Poster (1990, September)

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See detailInfluence of laminin and fibroblasts upon colony formation in the mouse by B16 melanoma cell spheroids
de Leval, Laurence; Leyh, Philippe; Grégoire, Dominique et al

in Anticancer Research (1990), 10(5B), 1447

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See detailInfluence of laminin or fibroblasts upon colony formation in the mouse by B16 melanoma cell spheroids: a morphometric analysis.
Coucke, P.; de Leval, Laurence ULg; Leyh, P. et al

in In Vivo (Athens, Greece) (1992), 6(2), 119-24

By microscopical observation and using an original morphometric method, we analyzed on histological sections the rate of lung colony formation after the intravenous injection into the mouse of B16 ... [more ▼]

By microscopical observation and using an original morphometric method, we analyzed on histological sections the rate of lung colony formation after the intravenous injection into the mouse of B16 melanoma cells previously cultivated in vitro as aggregates. After the injection of B16 pure spheroids, superficial lung colonies were more numerous than internal lung colonies. After the injection of mixed spheroids (B16 + 3T3 fibroblasts), the size of colony sections was increased. Addition of laminin to pure or mixed spheroids decreased the size of colony sections but increased the number of internal lung colonies. [less ▲]

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See detailThe influence of lateral bending restrain in numerical and experimental evaluation of lateral buckling resistance design moment of steel I-beams at elevated temperatures
Piloto, P. A. G.; Vila Real, P. M. M.; Franssen, Jean-Marc ULg

in Proceedings of the 5° Congreso Interamericano de Computacion Applicada a la Industria de Procesos (CAIP'2001) (2001)

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See detailThe influence of level of care on admission to neonatal care for babies of low-risk nullipara
Le Ray, C.; Zeitlin, J.; Jarreau, P. H. et al

in European Journal of Obstetrics & Gynecology & Reproductive Biology (2009), 144

Objective To analyze the risk of admission to neonatal care for newborns of low-risk nullipara and its variation with level of care of the maternity unit. Study design The sample included infants born to ... [more ▼]

Objective To analyze the risk of admission to neonatal care for newborns of low-risk nullipara and its variation with level of care of the maternity unit. Study design The sample included infants born to low-risk nulliparas from the PREMODA study of 138 French maternity units (n = 3652). Medical records of children admitted to neonatal care were reviewed to determine the reasons for admission and the severity of morbidity. The risk factors associated with admission to neonatal care, including maternal, infant and delivery unit characteristics, were studied by univariable analysis, followed by a multivariable analysis using a multilevel logistic model. Results The newborns of 3.5% (n = 129) of the nulliparous mothers at low risk were admitted to neonatal care at birth. The two principal reasons were infections (57%) and respiratory diseases (19%). Babies born in level 2 maternity units were twice as likely to be admitted to neonatal care as those born in level 1 units (ORa = 2.0 [1.1–3.7]) and those born in level 3 units, 1.5 times more often, although this was not statistically significant (ORa = 1.5 [0.8–2.8]). Babies admitted to neonatal care after delivery in level 1 had more severe morbidity (n = 4, 26.7%) than those admitted from level 2 (n = 4, 5.7%) or level 3 (n = 3, 6.8%) facilities (p = 0.046). Conclusion In low-risk populations, the level of care could have an influence on the decision to admit babies to neonatal care at birth. These findings add to the on-going debate about the optimal organization of care for women at low obstetrical risk. [less ▲]

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See detailInfluence of Lianol Solapro on sow milk production and piglet weight gain
Wavreille, José; Planchon, Viviane; Renaville, Robert ULg et al

in 21 Inter. Pig Vet Society Congress (2010)

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See detailInfluence of lignin in Reticulitermes santonensis: symbiotic interations investigated through proteomics
Bauwens, Julien ULg; Tarayre, Cédric ULg; Brasseur, Catherine ULg et al

in Symbiosis (2013)

The gut of lower termites is populated by numerous microbial species belonging to prokaryotes, fungi, yeasts and protists. These micro-organisms are organized in a complex symbiotic system, interacting ... [more ▼]

The gut of lower termites is populated by numerous microbial species belonging to prokaryotes, fungi, yeasts and protists. These micro-organisms are organized in a complex symbiotic system, interacting together and with the insect host. Their likely ability to degrade ligno-cellulosic compounds could lead to improvements in second generation biofuels production. Lignin elimination represents a critical point as this polymer significantly interferes with industrial process of cellulose. Although host produces its own lignin-degrading enzymes, some symbionts may participate in digestion of lignin and its degradation products in termite gut. Here, we compared gut proteomes from R. santonensis after rearing on artificial diets composed of cellulose with and without lignin. The effect of lignin in artificial diets on different parts of the digestive tract was compared through liquid chromatography associated with tandem mass spectrometry (LC-MS/MS) experiments. Enzymatic assays were performed to characterize activities present in R. santonensis digestive tract after feeding on artificial diets. Microscopic observations of microbial communities provided some information on population balances after feeding experiment. [less ▲]

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See detailInfluence of lipopeptide production on oxygen transfer during fermentation of Bacillus subtilis
Hbid, Choukri; Jacques, Philippe; Razafindralambo, Hary ULg et al

Poster (1995, May 07)

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See detailInfluence of low-dose aprotinin on the inflammatory reaction due to cardiopulmonary bypass in children
Seghaye, Marie-Christine ULg; Duchateau, J.; Grabitz, R. G. et al

in Annals of Thoracic Surgery (1996), 61(4), 1205-1211

Background. The serine protease inhibitor aprotinin inhibits trypsin, kallikrein, and plasmin and enhances the complement hemolytic activity of the first complement component C1. We tested whether low ... [more ▼]

Background. The serine protease inhibitor aprotinin inhibits trypsin, kallikrein, and plasmin and enhances the complement hemolytic activity of the first complement component C1. We tested whether low-dose aprotinin influences the inflammatory reaction related to cardiopulmonary bypass. Methods. In an open, randomized study, 25 children undergoing cardiac operations were investigated prospectively. The treated group comprised 11 patients receiving low-dose aprotinin (20,000 kIU/kg [2.8 mg/kg]), and the control group included 14 patients. Complement activation, cytokine production, and leukocyte stimulation were analyzed before, during, and after cardiopulmonary bypass. Results. In all children, significant C3 conversion and C5a generation, interleukin-6 synthesis, and myeloperoxidase, eosinophil cationic protein, and histamine liberation occurred in relation to cardiopulmonary bypass. This was not influenced by aprotinin treatment. In contrast, neutrophil kinetic studies at the end of cardiopulmonary bypass showed a significantly lower increase in the aprotinin as compared with the control group. Conclusions. Our results suggest that low-dose aprotinin has little influence on the inflammatory reaction induced by cardiopulmonary bypass. Aprotinin affects neutrophil mobilization but not white blood cell degranulation related to cardiopulmonary bypass, and has no influence on complement activation and interleukin-6 synthesis. [less ▲]

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See detailInfluence of magnet size on magnetically engineered field-induced superconductivity
Gillijns, W.; Milosevic, M. V.; Silhanek, Alejandro ULg et al

in Physical Review. B : Condensed Matter (2007), 76(18),

We investigate experimentally and theoretically the superconducting properties of an Al thin film covering a periodic array of Co/Pt magnetic disks with out-of-plane magnetization for different radii of ... [more ▼]

We investigate experimentally and theoretically the superconducting properties of an Al thin film covering a periodic array of Co/Pt magnetic disks with out-of-plane magnetization for different radii of the magnetic disks and constant period of the magnetic lattice. The presence of the arrays of magnetic dots leads to a quantized displacement of the normal/superconducting phase boundary along the magnetic field axis, with each step corresponding to a flux-quantum per unit cell of the magnetic lattice. We demonstrate that this so-called field-induced superconductivity is strongly dependent not only on the chosen magnetic material and its magnetization M but also on the radius R of the constructed magnetic disks. Since field-induced superconductivity is directly linked to the nucleation of vortex-antivortex (V-AV) pairs, a theoretical M-R equilibrium phase boundary is presented, delimiting regions of different numbers of induced V-AV pairs per magnet. A good qualitative and quantitative agreement is found between theory and experiment. [less ▲]

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See detailInfluence of magnetic fields on structural martensitic transitions
Yang, X *-D; Riseborough, P. S.; Modic, K. A. et al

in Philosophical Magazine (2009), 89(22-24), 2083-2091

We show evidence that a structural martensitic transition is related to significant changes in the electronic structure, as revealed in thermodynamic measurements made in high magnetic fields. The effect ... [more ▼]

We show evidence that a structural martensitic transition is related to significant changes in the electronic structure, as revealed in thermodynamic measurements made in high magnetic fields. The effect of the magnetic field is considered unusual as many influential investigations of martensitic transitions have emphasized that the structural transitions are primarily lattice dynamical and are driven by the entropy due to the phonons. We provide a theoretical framework, which can be used to describe the effect of the magnetic field on the lattice dynamics in which the field dependence originates from the dielectric constant. [less ▲]

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See detailInfluence of marrow erythropoietic activity on serum erythropoietin levels after autologous hematopoietic stem cell transplantation.
Beguin, Yves ULg; Baron, Frédéric ULg; Fillet, Georges ULg

in Haematologica (1998), 83(12), 1076-81

BACKGROUND AND OBJECTIVE: Serum erythropoietin (sEpo) concentration depends primarily on the rate of renal production in response to hypoxia. However, sEpo levels increase inappropriately after ... [more ▼]

BACKGROUND AND OBJECTIVE: Serum erythropoietin (sEpo) concentration depends primarily on the rate of renal production in response to hypoxia. However, sEpo levels increase inappropriately after conditioning for autologous stem cell transplantation (ASCT) before progressively returning to adequate levels. We investigated the possible influence of erythropoietic activity on these observations. DESIGN AND METHODS: Forty patients undergoing an ASCT, 8 with bone marrow (BMT) and 32 with peripheral blood stem cells (PBSC), were separated into 3 groups. Group 1 was formed of the 8 BMT patients (median time to 1% reticulocytes: 39 days), group 2 of 16 PBSC patients with relatively slow erythroid engraftment (> or = 15 days to 1% reticulocytes, median 19 days) and group 3 of 16 PBSC patients with prompt erythroid recovery (< 15 days to 1% reticulocytes, median 13 days). Marrow erythroid activity was assessed by serum transferrin receptor levels (sTfR). Serum Epo (sEpo) levels were expressed in relation to the degree of anemia as observed/predicted (O/P) ratios of (O/P) log (sEpo). RESULTS: Serum sTfR levels decreased by more than 50% in all 3 groups after conditioning, reaching their nadir on day 7. Nadir values doubled by day 28 in group 3, day 60 in group 2, but not within 100 days in group 1. O/P sEpo ratios increased inappropriately in all 3 groups after conditioning but then declined at very differing speeds in the 3 groups. In group 1, ratios remained above 1.10 through to day 28 and above 1.00 through to day 42, before leveling off at around 1.00 thereafter. In group 2, ratios remained above 1.00 through to day 14, than decreased to a minimum of 0.89 by day 42 before returning to 1.00 by day 100. In group 3, ratios decreased to 0.84 by day 21 and remained below 0.90 thereafter. INTERPRETATION AND CONCLUSIONS: We conclude that sEpo levels are not only influenced by tissue oxygenation but also depend on the mass of erythroid precursors in the bone marrow. This may be the main explanation for the observed changes in sEpo levels during ASCT. [less ▲]

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See detailThe influence of mechanical parameters on tissue differentiation and bone formation around immediately loaded implants in the bone chamber model
Vandamme, Katleen; Duyck, Joke; Geris, Liesbet ULg et al

in Proceedings of the first thematic workshop of the European Society of Biomechanics on Mechanobiology of Cells and Tissue Engineering (2005)

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See detailThe influence of mechanical parameters on tissue differentiation and bone formation around immediately loaded implants in the bone chamber model
Vandamme, Katleen; Duyck, Joke; Geris, Liesbet ULg et al

in Computer Methods in Biomechanics & Biomedical Engineering (2005, September), 8(4), 275-276

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See detailInfluence of medium composition on oxygen transfer rate in animal cell culture
Toye, Dominique ULg; Galifi, A.; Salmon, Thierry ULg et al

in Canadian Journal of Chemical Engineering (2010), 88(4), 671-676

Experiments were conducted in a 0.25m diameter bubble column to investigate the effect of medium composition on oxygen transfer rate. Aqueous solutions, the composition of which mimics a mammalian cell ... [more ▼]

Experiments were conducted in a 0.25m diameter bubble column to investigate the effect of medium composition on oxygen transfer rate. Aqueous solutions, the composition of which mimics a mammalian cell culture medium, are used. The effect on oxygen transfer rate of additives used to protect cells against local hydrodynamic stresses induced by bubble coalescence and bursting is addressed, in the range of operating conditions (aeration rates) met in animal cell cultures. The mass transfer coefficient, the liquid viscosity and surface tension, and the bubble size distribution are measured as a function of liquid composition and of gas superficial velocity, allowing to decouple the effects of the different additive on kL and on a. [less ▲]

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See detailInfluence of medium composition on oxygen transfer rate in animal cell culture
Toye, Dominique ULg; Galifi, Alain; Salmon, Thierry ULg et al

in Proceedings of 8th World Congress on Chemical Engineering (2009)

Experiments were conducted in a 0.25 m diameter bubble column to investigate the effect of animal cell culture medium composition on oxygen transfer rate. Air is used as the dispersed phase. The gas ... [more ▼]

Experiments were conducted in a 0.25 m diameter bubble column to investigate the effect of animal cell culture medium composition on oxygen transfer rate. Air is used as the dispersed phase. The gas superficial velocity is varied between 0.4 and 2 cm/s (aeration rate ranging between 0.05 and 0.25 vvm) and the bubble column is thus operated in the homogenous regime. Aqueous solutions the composition (electrolyte, protein concentrations) of which mimics a mammalian cell culture medium) are used as the continuous phase. In particular, the effect on oxygen transfer rate of additive such as PVP, Pluronic F-68 which are usually used to protect cells against local hydrodynamic stresses induced by bubble coalescence and bursting is addressed. For each composition, the mass transfer coefficient is measured by the "gas in – gas out" method using a fast response dissolved oxygen probe. Its increase with gas velocity is measured. The liquid viscosity and surface tension are experimentally determined as a function of culture medium composition. Bubble size distribution is measured at different scales using three experimental techniques: gas disengagement technique, two dual optical probes and photography, which lead to results in good qualitative agreement one with each other. The integrated analysis of these data allows to decouple the effects of the different additive on coefficient kL and on the interfacial area, a. [less ▲]

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See detailInfluence of melodic context on the perception of vocal pitch accuracy
Beeken, Manon; Morsomme, Dominique ULg; Larrouy, Pauline ULg

Poster (2014, May 27)

In order to categorize sung performances as “in tune” or “out of tune”, one can measure the deviation between the performance and the musical notation. Depending on the study, a deviation of a semitone ... [more ▼]

In order to categorize sung performances as “in tune” or “out of tune”, one can measure the deviation between the performance and the musical notation. Depending on the study, a deviation of a semitone (100 cents) or a quartertone (50 cents) is considered as “out of tune”. However, these values are arbitrary and the current study aims to define perceptual thresholds of pitch accuracy in a melodic context. For this purpose, melodic sequences were manipulated, from “in tune” (deviation of 0 cent) to “out of tune” (10 to 80 cents, in 10 cents steps). In a 2x2x2 design we systematically varied the conditions of: melodies (ascending/descending target-interval), type of errors (interval or tonality deviation), and direction of the deviation (enlargement or compression). The sequences were presented to 30 non-musicians using the method of limits procedure, in a test/retest paradigm. For each condition, they were asked to specify whether the presented singing performances were “in tune” or “out of tune”. The results showed that participants were consistent in their evaluation between the test and the retest. The pitch accuracy threshold (M = 29 cents, ES = .75) was not influenced by the melody, the type of errors, and the direction of the deviation. This study highlights the ability of non-musicians to perceive small pitch deviations (less than a quartertone) in a melodic context. This finding elucidates on the concept of pitch accuracy and therefore yields the opportunity to revise objective tools for the evaluation of singer pitch accuracy. [less ▲]

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