Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Peer Reviewed
See detailCinquante cas d'intoxication oxycarbonée traités par l'oxygénathérapie hyperbare
Lamy, Maurice ULg; Hanquet, Marcel

in Acta Anaesthesiologica Belgica (1969), 20

Detailed reference viewed: 13 (0 ULg)
See detailCinquante situations de communication pour l'apprentissage de l'expression orale dans l'enseignement fondamental
Grisay, A.; de Landsheere, Gilbert ULg; Gillet, C. et al

Learning material (1979)

Detailed reference viewed: 7 (1 ULg)
Full Text
Peer Reviewed
See detailCinquantenaire de la Légion d’honneur et Quinzaine française (Liège, 1969). Les enjeux politiques d’une commémoration
Lanneau, Catherine ULg

in Dujardin, Vincent; Tilly, Pierre (Eds.) Hommes et réseaux : Belgique, Europe, Outre-Mers. Liber amicorum Michel Dumoulin (2013)

Detailed reference viewed: 17 (1 ULg)
Full Text
Peer Reviewed
See detailCircadian and circannual variations in cord blood hematopoietic cell composition
Servais, Sophie ULg; BAUDOUX, Etienne ULg; Brichard, B. et al

in Haematologica (2014)

Detailed reference viewed: 12 (7 ULg)
Peer Reviewed
See detailCircadian and homeostatic regulation of sleepiness and cognition and its neuronal underpinnings
Schmidt, Christina; Chellappa, Sarah Laxhmi ULg; Cajochen, Christian

in Garbarino, Sergio (Ed.) Sleepiness and Human Impact Assessment (in press)

Detailed reference viewed: 17 (2 ULg)
Full Text
Peer Reviewed
See detailThe Circadian Clock and the homeostatic hourglass - two timepieces controlling Sleep and wakefulness
Chellappa, Sarah Laxhmi ULg; Cajochen, Christian

in Albercht, Urs (Ed.) The circadian clock (2010)

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailCircadian preference modulates the neural substrate of conflict processing across the day
Schmidt, Christina ULg; Peigneux, Philippe ULg; Leclercq, Yves ULg et al

in PLoS ONE (2012), 7(1), 29658

Human morning and evening chronotypes differ in their preferred timing for sleep and wakefulness, as well as in optimal daytime periods to cope with cognitive challenges. Recent evidence suggests that ... [more ▼]

Human morning and evening chronotypes differ in their preferred timing for sleep and wakefulness, as well as in optimal daytime periods to cope with cognitive challenges. Recent evidence suggests that these preferences are not a simple by-product of socio-professional timing constraints, but can be driven by inter-individual differences in the expression of circadian and homeostatic sleep-wake promoting signals. Chronotypes thus constitute a unique tool to access the interplay between those processes under normally entrained day-night conditions, and to investigate how they impinge onto higher cognitive control processes. Using functional magnetic resonance imaging (fMRI), we assessed the influence of chronotype and time-of-day on conflict processing-related cerebral activity throughout a normal waking day. Sixteen morning and 15 evening types were recorded at two individually adapted time points (1.5 versus 10.5 hours spent awake) while performing the Stroop paradigm. Results show that interference-related hemodynamic responses are maintained or even increased in evening types from the subjective morning to the subjective evening in a set of brain areas playing a pivotal role in successful inhibitory functioning, whereas they decreased in morning types under the same conditions. Furthermore, during the evening hours, activity in a posterior hypothalamic region putatively involved in sleep-wake regulation correlated in a chronotype-specific manner with slow wave activity at the beginning of the night, an index of accumulated homeostatic sleep pressure. These results shed light into the cerebral mechanisms underlying inter-individual differences of higher-order cognitive state maintenance under normally entrained day-night conditions. [less ▲]

Detailed reference viewed: 70 (10 ULg)
Full Text
Peer Reviewed
See detailCircadian Rhythm of Heart Rate and Heart Rate Variability
Massin, M. M.; Maeyns, K.; Withofs, Nadia ULg et al

in Archives of Disease in Childhood (2000), 83(2), 179-82

BACKGROUND: Measurements of heart rate variability (HRV) are increasingly used as markers of cardiac autonomic activity. AIM: To examine circadian variation in heart rate and HRV in children. SUBJECTS: A ... [more ▼]

BACKGROUND: Measurements of heart rate variability (HRV) are increasingly used as markers of cardiac autonomic activity. AIM: To examine circadian variation in heart rate and HRV in children. SUBJECTS: A total of 57 healthy infants and children, aged 2 months to 15 years, underwent ambulatory 24 hour Holter recording. Monitoring was also performed on five teenagers with diabetes mellitus and subclinical vagal neuropathy in order to identify the origin of the circadian variation in HRV. METHODS: The following variables were determined hourly: mean RR interval, four time domain (SDNN, SDNNi, rMSSD, and pNN50) and four frequency domain indices (very low, low and high frequency indices, low to high frequency ratio). A chronobiological analysis was made by cosinor method for each variable. RESULTS: A significant circadian variation in heart rate and HRV was present from late infancy or early childhood, characterised by a rise during sleep, except for the low to high frequency ratio that increased during daytime. The appearance of these circadian rhythms was associated with sleep maturation. Time of peak variability did not depend on age. Circadian variation was normal in patients with diabetes mellitus. CONCLUSION: We have identified a circadian rhythm of heart rate and HRV in infants and children. Our data confirm a progressive maturation of the autonomic nervous system and support the hypothesis that the organisation of sleep, associated with sympathetic withdrawal, is responsible for these rhythms. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Peer Reviewed
See detailCircadian Rhythm Sleep Disorder: Genetic and Environmental Factors
Chellappa, Sarah Laxhmi ULg; Viola, Antoine; Mongrain, Valerie

in Kushida, Clete (Ed.) Encyclopaedia of Sleep (in press)

Detailed reference viewed: 24 (1 ULg)
Full Text
Peer Reviewed
See detailCircadian rhythms and the induction of flowering in the long-day grass Lolium temulentum L.
Périlleux, Claire ULg; Bernier, Georges ULg; Kinet, Jean Marie

in Plant, Cell & Environment (1994), 17(6), 755-761

Plants of Lolium temulentum L. strain Ceres were grown in 8-h short day (SD) for 45 d before being exposed either to a single long day (LD) or to a single 8-h SD given during an extended dark period. For ... [more ▼]

Plants of Lolium temulentum L. strain Ceres were grown in 8-h short day (SD) for 45 d before being exposed either to a single long day (LD) or to a single 8-h SD given during an extended dark period. For LD induction, the critical photoperiod was between 12 and 14 h, and more than 16 h were needed for a maximal flowering response. During exposure to a single 24-h LD, the translocation of the floral stimulus began between the fourteenth and the sixteenth hours after the start of the light period, and was completed by the twenty-fourth hour. Full flowering was also induced by one 8-h SD beginning 4 or 28 h after the start of a 40-h dark period, i.e. by shifting 12 h forward or beyond the usual SD. The effectiveness of a so-called 'displaced short day' (DSD) was not affected by light quality and light intensity. With a mixture of incandescent and fluorescent lights at a total photosynthetic photon flux density of 400 µmol m-2 s-1, a 4-h light exposure beginning 4 h after the start of a 40-h dark period was sufficient to induce 100 flowering. The flower-inducing effect of a single 8-h DSD was also assessed during a 64-h dark period. Results revealed two maxima at a 20-h interval. This fluctuation in light sensitivity suggests that a circadian rhythm is involved in the control of flowering of L. temulentum. [less ▲]

Detailed reference viewed: 11 (1 ULg)
Peer Reviewed
See detailCircadian rhythms and the induction of flowering in the long-day plant Lolium temulentum L.
Périlleux, Claire ULg; Bernier, Georges; Kinet, Jean-Marie

in Physiologia Plantarum (1991), 85

Detailed reference viewed: 7 (1 ULg)
Peer Reviewed
See detailCircadian Synchronization of Liver Regeneration in Adult Rats: The Role Played by Adrenal Hormones
Barbason, Hervé ULg; Bouzahzah, B.; Herens, Christian ULg et al

in Cell and Tissue Kinetics (1989), 22(6), 451-460

The role played by the adrenal hormones in the regulation of liver proliferation in adult rats was investigated under various experimental conditions. In untreated control groups, cell growth was very low ... [more ▼]

The role played by the adrenal hormones in the regulation of liver proliferation in adult rats was investigated under various experimental conditions. In untreated control groups, cell growth was very low and endogenous corticosterone levels showed a clearly-defined circadian rhythm with a peak in the evening. Adrenalectomy depressed the level of endogenous corticosterone immediately and the growth rate of the liver increased significantly. We were able to prevent this effect by repeated injections of corticosterone at physiological doses. After a 1/3 hepatectomy and a sham-operation, the corticosterone blood level maintained its normal circadian pattern with the exception of a transient increase during the first two post-operative hours. After a hepatectomy of this kind, a negative correlation was found to exist between the adrenal hormone level and the waves of DNA synthesis; the subsequent mitoses appeared in two successive circadian waves of decreasing amplitude, a maximum value being reached in the morning. In rats submitted to a 1/3 hepatectomy and an adrenalectomy simultaneously, the endogenous corticosterone level fell significantly after a post-operative peak. The regenerating pattern was completely different from that induced by 1/3 hepatectomy alone. The rise in the labelling index began earlier and rose to significantly higher values; it was then followed by a single large mitotic wave without any circadian rhythm. These results favour the hypothesis that adrenal hormones have a significant effect on the negative control of liver regeneration. Circadian changes in the corticosterone level were responsible for the nycthemeral pattern observed in the regenerating liver after a partial hepatectomy. The results show a marked inhibition of the G1-S transition, particularly in the evening, when the endogenous corticosterone concentration was at its highest. Also discussed is the relationship between corticoids and 'chalones', which synergetically inhibit the passage from G0 into the cell cycle. [less ▲]

Detailed reference viewed: 39 (19 ULg)
Full Text
Peer Reviewed
See detailThe circadian system sets the temporal organization of basic human neuronal function
Chellappa, Sarah Laxhmi ULg; Ly, Julien; Gaggioni, Giulia ULg et al

Conference (2014, June 16)

Detailed reference viewed: 17 (4 ULg)
See detailCircadian variation in serum concentration of carcinoembryonic antigen (CEA) is altered in cancer patients.
FOCAN, C.; Castronovo, Vincenzo ULg; COLETTE, J. et al

in Annual Review of Chronopharmacology - Vol 1 (1984)

Detailed reference viewed: 7 (0 ULg)
See detailLa circonscription électorale fédérale
Sinardet, Dave; Dodeigne, Jérémy ULg; Reuchamps, Min ULg

in Bouhon, Frédéric; Reuchamps, Min (Eds.) Les systèmes électoraux de la Belgique (2012)

La gestion des sociétés divisées est complexe et peut prendre différentes formes institutionnelles. Parmi celles-ci, le système électoral constitue sans aucun doute une institution puissante pour ... [more ▼]

La gestion des sociétés divisées est complexe et peut prendre différentes formes institutionnelles. Parmi celles-ci, le système électoral constitue sans aucun doute une institution puissante pour accommoder les tensions ethno-territoriales. Dans le cas de la Belgique, plusieurs acteurs ont ainsi proposé l’instauration d’une circonscription électorale fédérale (CEF). Comme nous le présentons dans la première partie, cette proposition n’est cependant pas la panacée et deux grandes écoles de pensée s’opposent : l’école centripète qui prône un système électoral favorisant les dynamiques « transcommunautaires », et l’école centrifuge ou consociative préférant une logique du « chacun chez soi ». De ce point de vue, le système électoral belge, a été marqué par une accentuation constante de la logique consociative depuis les années 1960. Toutefois, comme nous le présentons dans la deuxième partie de ce chapitre, des propositions visant à (ré)instaurer une logique centripète dans le système électoral sont apparues plus ou moins à la même époque, dès la fin des années 1970. La proposition d’instaurer une circonscription électorale fédérale (ou unique) n’est donc pas neuve mais ne fait toujours pas l’unanimité au sein des différents partis politiques, comme l’illustrent les résultats de notre enquête réalisée auprès des hommes et des femmes politiques du pays. [less ▲]

Detailed reference viewed: 68 (5 ULg)
Full Text
See detailLa circonscription fédérale : un placebo administré à un malade incurable?
Bouhon, Frédéric ULg

E-print/Working paper (2007)

Detailed reference viewed: 22 (7 ULg)
Peer Reviewed
See detailLa circonscription fédérale en Belgique : une approche délibérative de la question
Dodeigne, Jérémy ULg

in Brunet, Sébastien; Claisse, Frédéric; Fallon, Catherine (Eds.) La participation à l'épreuve (2013)

L’idée d’une circonscription électorale fédérale (CEF) en Belgique a connu un intérêt tout particulier au cours de la période pré-électorale du 10 juin 2007. Durant la campagne, le groupe PAVIA a présenté ... [more ▼]

L’idée d’une circonscription électorale fédérale (CEF) en Belgique a connu un intérêt tout particulier au cours de la période pré-électorale du 10 juin 2007. Durant la campagne, le groupe PAVIA a présenté sa proposition de réforme électorale, les hommes et les femmes politiques se sont positionnés, tandis que les éditorialistes du nord et du sud du pays s’exprimaient, plus ou moins favorablement à l’idée. Dans ce chapitre, ce n’est pas tant l’analyse de ces processus qui est explorée mais le regard citoyen sur la question. À l'aide d'un protocole délibératif (atelier scénario) nous tentons de mieux connaître – et comprendre – les opinions citoyennes. Réunissant douze personnes de l’arrondissement liégeois, deux experts et le monde politique, ces ateliers scénarios eurent lieu à l’automne 2009. [less ▲]

Detailed reference viewed: 66 (7 ULg)
Full Text
See detail"Le circuit court en procédure"
Moreau, Pierre ULg

in Droit judiciaire privé (et Droit du contentieux) (1995)

Detailed reference viewed: 17 (3 ULg)