Is facultative paedomorphosis driving trophic niche differentiation in the Alpine newt?
Lejeune, Benjamin ; Lepoint, Gilles ; Sturaro, Nicolas et al
Conference (2015, October 09)Detailed reference viewed: 26 (5 ULg)
Is FDG bowel uptake modified by oral spasmolytic premedication ?
; DAENEN, Frédéric ; et al
in Journal of Nuclear Medicine (The) (2002), 43Detailed reference viewed: 22 (0 ULg)
Is FDG-PET/CT an early indicator of the clinical response to rituximab in rheumatoid arthritis ?
NAMUR, Gauthier ; KAISER, Marie-Joëlle ; et al
in Journal of Nuclear Medicine (The) (2008), 49(SUPPL), 10Detailed reference viewed: 19 (0 ULg)
Is FE(NO50) useful diagnostic tool in suspected asthma?
SCHLEICH, FLorence ; ASANDEI, Raluca ; Manise, Maïté et al
in International Journal of Clinical Practice (2012), 66(2), 158-65
Background: Asthma diagnosis is based on the presence of symptoms and the demonstration of airflow variability. Airway inflammation measured by fractional exhaled nitric oxide, measured at a flow rate of ... [more ▼]
Background: Asthma diagnosis is based on the presence of symptoms and the demonstration of airflow variability. Airway inflammation measured by fractional exhaled nitric oxide, measured at a flow rate of 50 ml/s (FE(NO50) ) remains a controversial diagnostic tool. Aim: To assess the ability of FE(NO50) to identify bronchial hyperresponsiveness (BHR) to methacholine (provocative concentration of methacholine causing a 20% fall in FEV(1) ; PC20M </= 16 mg/ml) and to establish whether or not symptoms relate to FE(NO50) and PC20M in patients with no demonstrated reversibility to beta(2) -agonist. Methods: We conducted a prospective study on 174 steroid naive patients with respiratory symptoms, forced expiratory volume in 1 s (FEV(1) ) >/= 70% predicted and no demonstrated reversibility to beta(2) -agonist. Patients answered to a standardised symptom questionnaire and underwent FE(NO50) and methacholine challenge. Receiver-operating characteristic (ROC) curve and logistic regression analysis assessed the relationship between PC20M and FE(NO50) , taking into account covariates (smoking, atopy, age, gender and FEV(1) ). Results: A total of 82 patients had a PC20M </= 16 mg/ml and had significantly higher FE(NO50) (19 ppb vs. 15 ppb; p < 0.05). By constructing ROC curve, we found that FE(NO50) cut-off value of 34 ppb was able to identify not only BHR with high specificity (95%) and positive predictive value (88%) but low sensitivity (35%) and negative predictive value (62%). When combining all variables into the logistic model, FE(NO50) (p = 0.0011) and FEV(1) (p < 0.0001) were independent predictors of BHR whereas age, gender, smoking and atopy had no influence. The presence of diurnal and nocturnal wheezing was associated with raised FE(NO50) (p < 0.001 and p < 0.05, respectively). Conclusion: The value of FE(NO50) > 34 ppb has high predictive value of PC20M < 16 in patients with suspected asthma in whom bronchodilating test failed to demonstrate reversibility or was not indicated. However, FE(NO50) </= 34 ppb does not rule out BHR and should prompt the clinician to ask for a methacholine challenge. [less ▲]Detailed reference viewed: 42 (13 ULg)
Is Fractal Geometry Useful in Medicine and Biomedical Sciences?
; Fissette, Jean ; et al
in Medical Hypotheses (2000), 54(3), 360-6
Fractal geometry has become very useful in the understanding of many phenomena in various fields such as astrophysics, economy or agriculture and recently in medicine. After a brief intuitive introduction ... [more ▼]
Fractal geometry has become very useful in the understanding of many phenomena in various fields such as astrophysics, economy or agriculture and recently in medicine. After a brief intuitive introduction to the basis of fractal geometry, the clue is made about the correlation between Df and the complexity or the irregularity of a structure. However, fractal analysis must be applied with certain caution in natural objects such as bio-medical ones. The cardio-vascular system remains one of the most important fields of application of these kinds of approach. Spectral analysis of the R-R interval, morphology of the distal coronary arteries constitute two examples. Other very interesting applications are founded in bacteriology, medical imaging or ophthalmology. In our institution, we apply fractal analysis in order to quantitate angiogenesis and other vascular processes. [less ▲]Detailed reference viewed: 20 (0 ULg)
Is Geometallurgy Teachable? A challenge for the new Erasmus Mundus EMerald
Conference (2014, September 05)
designate any kind of advanced ore characterisation prior to mineral processing operations while in fact it should clearly refer to a multidisciplinary integration of geological, mining, metallurgical ... [more ▼]
designate any kind of advanced ore characterisation prior to mineral processing operations while in fact it should clearly refer to a multidisciplinary integration of geological, mining, metallurgical, environmental and economic information into a single orebody model. In order to instil the best available geometallurgical practices in the professional world, it seems essential to break the traditional cleavages among disciplines and educate a new generation of engineers. The Erasmus Mundus EMerald “Master in Georesources Engineering” program initiated by four European universities under the coordination of University of Liege, has been designed to exactly tackle this challenge. It is not surprising that this program has been set up by universities having a long tradition in mixing a double perspective of geology and engineering (Nancy; Lulea; Liege and Freiberg). Geometallurgy requires both an excellent understanding of the natural variability and complexity of an ore and a comprehensive overview of the techniques available to extract and concentrate any valuable material. The course program has been designed to achieve a right balance between knowledge of mineral resources (geology, resource characterisation, reserve estimation, modelling) and processing (comminution, preconcentration, leaching, waste disposal,...). It also includes a broader view on life cycle analysis and urban mining. A series of professional seminars, suggested by an industrial advisory board, shed light on strategic issues, economic and environmental challenges, corporate social responsibilities, etc. Mobility and multicultural experience is an added-value of the Erasmus Mundus experience which definitely contributes to breeding engineers for tomorrow. [less ▲]Detailed reference viewed: 87 (6 ULg)
Is global left ventricular afterload has an impact on left atrial function in patients with aortic stenosis?
; Magne, Julien ; MOONEN, Marie et al
Conference (2010)Detailed reference viewed: 5 (2 ULg)
Is group climate a protective factor of substance use for Canadian girls with problem behaviors?
Mathys, Cécile ;
Conference (2012)Detailed reference viewed: 16 (2 ULg)
Is HD 163899 really a supergiant star?
Godart, Mélanie ; Dupret, Marc-Antoine ; Noels-Grötsch, Arlette
in Communications in Asteroseismology (2008), 157
According to its spectral type B2 Ib/I I (Klare & Neckel 1977; Schmidt & Carruthers 1996), HD163899 is a supergiant star. The star presents p and g-mode pulsations (Saio et al. 2006). In such a post-main ... [more ▼]
According to its spectral type B2 Ib/I I (Klare & Neckel 1977; Schmidt & Carruthers 1996), HD163899 is a supergiant star. The star presents p and g-mode pulsations (Saio et al. 2006). In such a post-main sequence (post MS) star, the helium core is radiative with a very large Brunt-Väisälä frequency which produces a strong damping. The presence of excited g-modes is however possible thanks to an intermediate convective zone (ICZ) which prevents some g-modes from entering the radiative damping core (Saio et al. 2006). We have investigated an alternative solution. We show that MS evolutionary tracks could cross the error box of HD 163899 if a sufficiently large amount of overshooting is taken into account. However, in that case, the spectrum of unstable modes is different from the spectrum of a supergiant star since the Brunt-Väisälä frequency is much smaller. [less ▲]Detailed reference viewed: 9 (0 ULg)
Is HIF-1alpha a pro- or an anti-apoptotic protein?
; Mottet, Denis ; et al
in Biochemical Pharmacology (2002), 64(5-6), 889-92
Hypoxia-inducible factor-1 (HIF-1) is the major transcription factor specifically activated by hypoxia. It induces the expression of different genes whose products play an adaptive role for hypoxic cells ... [more ▼]
Hypoxia-inducible factor-1 (HIF-1) is the major transcription factor specifically activated by hypoxia. It induces the expression of different genes whose products play an adaptive role for hypoxic cells and tissues. Besides these protective responses, HIF-1 and/or hypoxia have also been shown to be either anti-apoptotic or pro-apoptotic, according to the cell type and experimental conditions. More severe or prolonged hypoxia rather induces apoptosis that is, at least in part, initiated by the direct association of HIF-1alpha and p53 and p53-induced gene expression. On the other hand, HIF-1alpha dimerized with ARNT, as an active transcription factor, can protect cells from apoptosis induced by several conditions. This review is aimed to describe the different mechanisms that account for these opposite effects of HIF-1alpha. [less ▲]Detailed reference viewed: 23 (3 ULg)
Is hypoxia-inducible factor 1 an actor in migraine pathogenesis ? An experimental study of possible metabolic facets including hypoxia and mitochondrial impairment
Multon, Sylvie ; ; Schoenen, Jean
Poster (2008, September)Detailed reference viewed: 21 (0 ULg)
Is hypoxia-inducible factor 1 an actor in migraine pathogenesis?
TRUONG, Julie ; ; Schoenen, Jean et al
Poster (2009, May)Detailed reference viewed: 28 (0 ULg)
Is IL-6 capable to modify chondrocyte metabolism ?
Henrotin, Yves ; ; et al
in Clinical Rheumatology (1996), 15Detailed reference viewed: 7 (2 ULg)
Is individual consistency in body mass and reproductive decisions linked to individual specialization in foraging behavior in a long-lived seabird?
; ; Sturaro, Nicolas et al
in Ecology and Evolution (2016)
Individual specialization in diet or foraging behavior within apparently generalist populations has been described for many species, especially in polar and temperate marine environments, where resource ... [more ▼]
Individual specialization in diet or foraging behavior within apparently generalist populations has been described for many species, especially in polar and temperate marine environments, where resource distribution is relatively predictable. It is unclear, however, whether and how increased environmental variability – and thus reduced predictability of resources – due to global climate change will affect individual specialization. We determined the within- and among-individual components of the trophic niche and the within-individual repeatability of d13C and d15N in feathers and red blood cells of individual female southern rockhopper penguins (Eudyptes chrysocome) across 7 years. We also investigated the effect of environmental variables (Southern Annular Mode, Southern Oscillation Index, and local sea surface temperature anomaly) on the isotopic values, as well as the link between stable isotopes and female body mass, clutch initiation dates, and total clutch mass. We observed consistent red blood cell d13C and d15N values within individuals among years, suggesting a moderate degree of within-individual specialization in C and N during the prebreeding period. However, the total niche width was reduced and individual specialization not present during the premolt period. Despite significant interannual differences in isotope values of C and N and environmental conditions, none of the environmental variables were linked to stable isotope values and thus able to explain phenotypic plasticity. Furthermore, neither the within-individual nor among-individual effects of stable isotopes were found to be related to female body mass, clutch initiation date, or total clutch mass. In conclusion, our results emphasize that the degree of specialization within generalist populations can vary over the course of 1 year, even when being consistent within the same season across years. We were unable to confirm that environmental variability counteracts individual specialization in foraging behavior, as phenotypic plasticity in d13C and d15N was not linked to any of the environmental variables studied. [less ▲]Detailed reference viewed: 12 (1 ULg)
Is Ion Mobility Mass Spectrometry the Missing Tool in Polymer Drug Delivery Development?
Haler, Jean ; Morsa, Denis ; Far, Johann et al
Poster (2015, April)Detailed reference viewed: 32 (12 ULg)
Is isokinetic eccentric exercise dangerous for the heart?
LE GOFF, Caroline ; Kaux, Jean-François ; LAURENT, Terry et al
in Isokinetics & Exercise Science (2014), 22(2), 131-136
BACKGROUND: Very strenuous exercises can be performed on an isokinetic dynamometer in order to evaluate the resistance to fatigue of different muscular groups. Good cardiac function is necessary in order ... [more ▼]
BACKGROUND: Very strenuous exercises can be performed on an isokinetic dynamometer in order to evaluate the resistance to fatigue of different muscular groups. Good cardiac function is necessary in order to perform these very intensive exercises; otherwise an acute myocardial dysfunction could theoretically appear in predisposed patients. OBJECTIVE: Our study aimed to observe the cardiovascular impact of a maximal intense isokinetic eccentric exercise performed by a population of sedentary young men. METHODS: Resting and post-exercise (just after, 3 hours and 24 hours after the exercise) blood samples were taken from 12 young male sedentary healthy subjects. These subjects performed an intense maximal eccentric isokinetic exercise of the quadriceps muscle.We evaluated markers of cardiovascular risk (troponin I, highly sensitive troponin T, NT-proBNP,myoglobin), of inflammation (hsCRP) and of oxidative stress (myeloperoxydase, lipidic peroxides, reduced and oxidized glutathione). RESULTS: The following observations were made: no significant increase in cardiac (NT-proBNP, troponins) or inflammation (hsCRP) biomarkers; a significant increase in myoglobin, myeloperoxidase, lipidic peroxides, oxidised glutathione just after the exercise. CONCLUSIONS: No modification in cardiac biomarkers were observed after the maximal eccentric isokinetic exercise. We were thus able to prove that the exercise could be performed without any risk to cardiac function in young sedentary subjects. However, a significant level of oxidative stress was induced by this exercise. [less ▲]Detailed reference viewed: 74 (15 ULg)