References of "1992"
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See detailExtending the GHER 3D Model to the modelling of ecosystems in Western Mediterranean coastal zones: results from an exploratory study
Lacroix, Geneviève; Djenidi, Salim ULg

in Martin, Jean-Marie; Barth, Hartmut (Eds.) EROS 2000 (European River Ocean System) (1992)

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See detailPsychology in Belgium
Richelle, Marc ULg; Janssen, P.; Brédart, Serge ULg

in Annual Review of Psychology (1992), 43

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See detailStatistical hypothesis and orthogonal projections for unbalanced data
Iemma, A. F.; Palm, Rodolphe ULg

Poster (1992)

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See detailPsychisme et greffe cardiaque
Triffaux, Jean-Marc ULg; Bertrand, Jean ULg

in Psychologie Médicale (1992)

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See detailCoastal Ocean Modelling
Nihoul, Jacques ULg; Djenidi, Salim ULg

in Bordomer 92 (1992)

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See detailEtude de la liaison de l'eau dans des gels et de la poudre d'amidon de pois
Marin, Christine; Paquot, Michel ULg; Bera, François ULg et al

in European Conference on Grain Legumes (1992)

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See detailFacilitation of Responses to Motor Cortex Stimulation: Effects of Isometric Voluntary Contraction
Maertens De Noordhout, Alain ULg; PEPIN, Jean-Louis ULg; GERARD, Pascale ULg et al

in Annals of Neurology (1992), 32(3), 365-70

In 7 normal subjects we compared the facilitatory effect of isometric contraction of the tibialis anterior on the size of electromyographic responses evoked in this muscle by electric stimuli applied over ... [more ▼]

In 7 normal subjects we compared the facilitatory effect of isometric contraction of the tibialis anterior on the size of electromyographic responses evoked in this muscle by electric stimuli applied over the cervical column and by electric and magnetic percutaneous stimulation of the motor cortex. No significant difference was found between the degrees of facilitation of the responses to any of the stimuli. Using collision techniques, we also showed that the pyramidal fibers activated by spinal and cortical stimuli are the same. Facilitation induced by isometric contraction (20% maximum) was of similar or greater magnitude than that found with constant vibration of the tendon of the target muscle. In cases where vibration and contraction had equal facilitatory effects, there was no further facilitation of the responses when both conditions were applied together. These findings indicate that the facilitatory effect of isometric contraction of the target muscle essentially originates at a spinal level rather than in the motor cortex. [less ▲]

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See detailAmineptine and response timing in the rat
Lejeune, Helga ULg; Hermans, Isabelle ULg; Mocaer, E. et al

in Soffié, M. (Ed.) Proceedings of the 13th Low Countries Meeting, May 22, University of Louvain-la-Neuve, Belgium (1992)

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See detailTechnical and methodological requirements for reliable haemodynamic measurements in the unsedated calf.
Amory, Hélène ULg; Linden, Annick ULg; Desmecht, Daniel ULg et al

in Veterinary Research Communications (1992), 16(5), 391-401

The purpose of this study was (1) to evaluate the technical and methodological problems associated with invasive haemodynamic measurements in unsedated cattle; (2) to assess the reproducibility of such ... [more ▼]

The purpose of this study was (1) to evaluate the technical and methodological problems associated with invasive haemodynamic measurements in unsedated cattle; (2) to assess the reproducibility of such measurements both within and between days; and (3) to compare the values with those previously reported. Twenty-one healthy calves, aged from 5.5 to 12 months, were studied. The central venous, the right ventricular, the pulmonary arterial, the pulmonary capillary wedge and the systemic arterial pressures were obtained by means of fluid-filled catheters, and the cardiac output was measured by the thermodilution technique. The heart rate, the stroke volume, the pulmonary and systemic vascular resistances and the pulmonary and systemic ventricular workloads were calculated. An adverse reaction, consisting of severe pulmonary hypertension, tachycardia, tachypnoea and transient weakness, occurred in 7 calves during the catheterization procedures. Such a reaction might be due to a local reflex induced by stimulation of mechano-receptors by the catheter tip. It should be avoided by reducing the manipulation of the catheter as much as possible and by inflating the tip of the balloon when moving it forwards. A comparison of the vascular pressures with those previously reported was difficult because of methodological or technical limitations, such as, for instance, a lack of standardization of the baseline. The reproducibility of the haemodynamic measurements obtained was satisfactory, in contrast to previous studies performed in conscious animals. This was attributed to our animals being better trained to the experimental conditions and emphasizes the importance of reducing mental stress in obtaining reliable haemodynamic measurements in unsedated and potentially uncooperative animals. [less ▲]

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See detailCompte rendu de J.L. NELSON, Politics and Ritual in Early medieval Europe
Marchandisse, Alain ULg

in Moyen Age (Le) (1992), 98

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See detailLes peintures de la cathédrale de Liège.Histoire & restauration
George, Philippe ULg; Lhoist-Colman Berthe

in Feuillets de la Cathédrale de Liège (1992)

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See detailObservations sur l'utilisation de traitements gonadotropes répétés chez la chèvre laitière
Baril, Gérard; Remy, Benoît ULg; Vallet, J. C. et al

in Annales de Zootechnie (1992), 41(3-4), 291-296

Observations on the repeated use of gonadotropin treatments in the dairy goat. Our studies have attempted to determine if the absence of oestrus observed in some goats after fluorogestone acetate-pregnant ... [more ▼]

Observations on the repeated use of gonadotropin treatments in the dairy goat. Our studies have attempted to determine if the absence of oestrus observed in some goats after fluorogestone acetate-pregnant mare serum gonadotropin (FGA-PMSG) treatments could be due to its repeated use. An experiment was carried out in a Saanen flock, in which she-goats were submitted to FGA-PMSG treatment each year. The first treatment of the year was performed on 169 shegoats between March and August 1989. Of the females diagnosed as non-pregnant following the first treatment, 38 were treated a second time during the same period. The proportion of females which went into oestrus after the first treatment was lower in 59 multiparous goats than in 64 nulliparous and in 46 primiparous goats (64.4 vs 100 and 97.8%; P < O.Oi). For the she-goats treated twice, the percentage of females which went into oestrus after the second treatment was lower than that observed after the first treatment (44.7 vs 71.0%; P < 0.05). The presence of anti-PMSG antibodies in plasma was investigated in blood samples taken before and after each treatment. Results are expressed as % of radioactive PMSG bound by 10 pl of blood plasma. Before the first treatment, the percentage of bound PMSG was higher in multiparous than in nulliparous and primiparous goats (17.5 t 23.1 vs -0.06 t 0.7 ; 1.2 ± 1.9 ; P < 0.01), and increased after treatment for all parities. In goats treated twice, the percentage of bound PMSG before the second treatment was higher than that observed before first treatment (22.8 t 23. vs 11.2 f 19.7; P < 0.05). For both treatments, females which did not come into oestrus showed a percentage of bound PMSG which was significantly higher than that of goats in which oestrus was observed (multiparous first treatment: 30.5 f 23.6 vs 1I 2. 9 20. 1 %; she-goats in second treatment: 33.9 ± 23.1 vs 9.2 ± 14.5T.). When the percentage of bound PMSG before treatment was low (< 5°l) in multiparous goats, the oestrus and kidding rates after the first treatment did not differ from those observed in nulliparous and primiparous goats. The decrease in the efficiency of the treatments was therefore not due to the age of animals. The repeated use of FGA-PMSG during the lifetime of goats or within the same year is followed by an increase in the levels of antibodies against PMSG. The presence of those antibodies may explain the decrease in the efficiency of these treatments in inducing and synchronizing oestrus. [less ▲]

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See detailSilurian and Lower Emsian miospores from Saudi Arabia
Steemans, Philippe ULg

Conference (1992)

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See detailLe martin pêcheur: une cohabitation difficile
Libois, Roland ULg

Learning material (1992)

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See detailEtude des activateurs du plasminogène et de leurs inhibiteurs dans le système nerveux en développement.
Schoenen, Jean ULg; Lefebvre, P.; Delrée, P. et al

Conference (1992)

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See detailThe complexity of scheduling short tasks with few starting times
Crama, Yves ULg; Spieksma, Frits C.R.

Report (1992)

The following problem is proved to be NP-complete: given n tasks, such that each task has processing time \tau=2, and has no more than k=3 possible starting times, does there exist a feasible schedule for ... [more ▼]

The following problem is proved to be NP-complete: given n tasks, such that each task has processing time \tau=2, and has no more than k=3 possible starting times, does there exist a feasible schedule for these tasks on a single processor? This result establishes a sharp borderline between NP-complete and polynomially solvable versions of this problem with respect to the parameters \tau and k. [less ▲]

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See detailBeam-Laser Lifetime Measurements for the z 5P° and z 7P° Levels in Mn IIand Their Implications for a Revised Solar Manganese Abundance
Pinnington, E. H.; Guo, B.; Ji, Q. et al

in Journal of Physics : B Atomic Molecular & Optical Physics (1992), 25

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See detailProtective systems against activated oxygen species compared in normal and fully habituated nonorganogenic sugarbeet calluses
Hagège, D.; Kevers, Claire ULg; Salabert, P. et al

in In Vitro - Plant (1992), 28(3), 143-147

The levels of the water-soluble reductants ascorbic acid and glutathione and the activities of the enzymatic antioxidants superoxide dismutase, catalase, ascorbate peroxidase, monodehydroascorbate and ... [more ▼]

The levels of the water-soluble reductants ascorbic acid and glutathione and the activities of the enzymatic antioxidants superoxide dismutase, catalase, ascorbate peroxidase, monodehydroascorbate and dehydroascorbate reductases and glutathione reductase were determined in a fully habituated nonorganogenic sugarbeet callus line (considered a neoplasm) compared with a normal hormone-dependent callus of the same plant. Ascorbic acid was not recovered from either of the two calluses, irrespective of the technique used. Glutathione was titrated at a slightly higher level in the normal callus. Catalase activity was almost nonexistent in the habituated callus. The other enzymes (superoxide dismutase, glutathione reductase, monodehydroascorbate reductase, dehydroascorbate reductase, and ascorbate peroxidase) were found to have higher activities in the habituated callus. The results are interpreted as a higher protection of the neoplastic habituated cells against oxygen-free radicals and hydroperoxide-dependent oxidations. Such strong scavenging properties of the habituated cell line could explain previous results already reported, namely the stimulation of cell division at the expense of cell differentiation. © 1992 Tissue Culture Association. [less ▲]

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See detailL'aérosolthérapie : principes d'action et exigences techniques pour des résultats thérapeutiques optimaux
Genicot, Bruno; Mouligneau, Frédéric; Lekeux, Pierre ULg

in Annales de Médecine Vétérinaire (1992), 136

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