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See detailHydrogeological survey in Diegem (IBM) – Stage II – Drilling and pumping tests
Biver, Pierre; Dassargues, Alain ULg; Monjoie, Albéric

Report (1989)

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See detailLa morphologie verbale en néo-égyptien (de la 18e à la 25e dynastie)
Winand, Jean ULg

Doctoral thesis (1989)

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See detailEtudes de néo-égyptien I: la morphologie verbale
Winand, Jean ULg

Doctoral thesis (1989)

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See detailLes marqueurs tissulaires dans l'infarctus du myocarde
Chapelle, Jean-Paul ULg

Conference (1989, December 02)

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See detailAddendum à la table d'erreurs de désignations d'étoiles Ap ou Am
Renson, Pierre ULg

in Bulletin d'Information du Centre de Données Stellaires (1989), 37

Not Available

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See detailQualitative approach of the general vacuum Bianchi VI and VII cosmological models near the singularity
De Rop, Yves ULg

in General Relativity & Gravitation (1989), 21

We first show that the chaos-generating terms are absent from the vacuum field equations in the case of the general Bianchi VI and VII cosmological models. According to recent studies, this proves that ... [more ▼]

We first show that the chaos-generating terms are absent from the vacuum field equations in the case of the general Bianchi VI and VII cosmological models. According to recent studies, this proves that the Kasnerian metric is a general solution for these models in the neighborhood of the initial singularity. Then, using a method developed by Jantzen, we reduce the field equations to a nonautonomous system of order two. A numerical integration leads to the explicit four-parameter asymptotic form of a general solution, which is indeed Kasnerian in the canonical invariant basis. [less ▲]

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See detailNucleotide sequence of the gene encoding the active-site serine β-lactamase from Actinomadura R39
Houba, Simone; Willem, Sabine; Duez, Colette ULg et al

in FEMS Microbiology Letters (1989), 65(3), 241-246

The gene encoding the extracellular, active-site serine beta-lactamase of Actinomadura R39, previously cloned into Streptomyces lividans, has the information for the synthesis of a 304 amino acid protein ... [more ▼]

The gene encoding the extracellular, active-site serine beta-lactamase of Actinomadura R39, previously cloned into Streptomyces lividans, has the information for the synthesis of a 304 amino acid protein, the amino terminal region of which has the characteristic features of a signal peptide. The Actinomadura R39 beta-lactamase is another member of the class A beta-lactamases. In particular, it shows high homology with the beta-lactamase of Bacillus licheniformis. [less ▲]

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See detailUne alimentation correcte pour preparer les genisses a leur carriere de hautes productrices.
Thewis, André ULg

in Elevages Belges (1989), 42(12), 24-27

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See detailSarcome d'Ewing du rachis : à propos de trois observations
Lenelle, Jacques ULg; Gillet, P.; Mouchamps, M. et al

Conference (1989, December)

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See detailEpilepsy: The Use of Oxygen-15-Labeled Gases
Franck, Georges ULg; Salmon, Eric ULg; Sadzot, Bernard ULg et al

in Seminars in Neurology (1989), 9(4), 307-16

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See detailExperimental Infection of Bulls with a Genital Isolate of Bovine Herpesvirus-4 and Reactivation of Latent Virus with Dexamethasone
Dubuisson, J.; Thiry, Etienne ULg; Bublot, M. et al

in Veterinary Microbiology (1989), 21(2), 97-114

Five 13- to 18-month old Belgian Blue bulls were used in this experiment. Four bulls (Nos. 2, 3, 4 and 5) were inoculated intratesticularly with 10(5) plaque-forming units of bovine herpesvirus-4 (BHV-4 ... [more ▼]

Five 13- to 18-month old Belgian Blue bulls were used in this experiment. Four bulls (Nos. 2, 3, 4 and 5) were inoculated intratesticularly with 10(5) plaque-forming units of bovine herpesvirus-4 (BHV-4) in each testicle (Day 0). The challenge BHV-4 strain was previously isolated from testicle cells of a bull exhibiting orchitis and azoospermia. The fifth bull (No. 1) was used as a control and received the same volume of uninfected cell culture supernatant. For 5 days, beginning on Day 51 post-infection, two bulls (Nos. 4 and 5) and the control bull (No. 1) received 0.1 mg kg-1 of dexamethasone. Unilateral castrations were then performed at regular intervals for viral examination. Treatment with dexamethasone reactivated latent BHV-4, but no clinical signs were observed in treated bulls until the end of the experiment (Day 93). Only Bull 3 showed conjunctivitis and temporary azoospermia. The virus was recovered from various samples showing that: (i) BHV-4 can be present in a latent state in the testicles and mononuclear blood cells; (ii) dexamethasone reactivates the virus; (iii) the virus is excreted by nasal and ocular routes. Each infected bull seroconverted and a booster antibody response appeared after dexamethasone treatment as shown by immunofluorescence. Neutralizing antibodies were detected in each bull by complement-dependent neutralization test with titres higher than those obtained by a classical neutralization test. No booster response of neutralizing antibodies was observed after dexamethasone treatment. The antigenically relevant envelope BHV-4 proteins were identified by Western blotting using sera samples from the animals. DNA restriction endonuclease profiles of viruses reisolated after primary infection and reactivation showed only small differences. [less ▲]

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See detailSur le contact linéaire technique
Debongnie, Jean-François ULg

Report (1989)

This paper develops, from the technical linear contact concept, a step leading to an analytical prediction of the mutual displacement of two bodies in linear hertzian contact. The results are compared to ... [more ▼]

This paper develops, from the technical linear contact concept, a step leading to an analytical prediction of the mutual displacement of two bodies in linear hertzian contact. The results are compared to the approximate expressions of Dowson and Higginson, Lundberg, and Eschmann et al. [less ▲]

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See detailAn Autoradiographic Study of Alpha 1-Adrenergic Receptors in the Brain of the Japanese Quail (Coturnix Coturnix Japonica)
Balthazart, Jacques ULg; Ball, G. F.; McEwen, B. S.

in Cell & Tissue Research (1989), 258(3), 563-8

The neuroanatomical distribution of alpha 1-adrenergic receptors was studied in Japanese quail by quantitative in vitro autoradiography using the specific antagonist [3H]prazosin as the ligand. The ... [more ▼]

The neuroanatomical distribution of alpha 1-adrenergic receptors was studied in Japanese quail by quantitative in vitro autoradiography using the specific antagonist [3H]prazosin as the ligand. The presence of saturable (Bmax less than 200 fmol/mg protein) high affinity (Kd less than 0.12 nM) binding sites was detected by saturation analysis. High concentrations of [3H]prazosin binding sites were detected in the archistriatum/pars ventralis, the hippocampus, the cortex piriformis, the area corticoidea dorsolateralis, the dorsal thalamus, and the nucleus praetectalis. Lower concentrations were seen in the intercollicular nucleus, the lateral septum, and the posterior and tuberal hypothalamus. Very little binding was seen in the preoptic and anterior hypothalamic areas. The relatively high number of binding sites identified in the telencephalic structures agrees well with previous mammalian studies. This is in contrast with the pattern in the anterior hypothalamus where, in mammals, a number of nuclei have been reported to contain a high receptor density. [less ▲]

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See detailContribution of Peripheral Blood Pooling to Central Hemodynamic Disturbances During Endotoxin Insult in Intact Dogs
D'Orio, Vincenzo ULg; Wahlen, C.; Naldi, Marco ULg et al

in Critical Care Medicine (1989), 17(12), 1314-9

The aim of the present study was to determine possible effects of Escherichia coli endotoxin on peripheral vascular compliance and relate them to concomitant central hemodynamic disturbances. Endotoxin ... [more ▼]

The aim of the present study was to determine possible effects of Escherichia coli endotoxin on peripheral vascular compliance and relate them to concomitant central hemodynamic disturbances. Endotoxin was infused at 0.25 micrograms/kg.min during 2 h in six anesthetized dogs, while six additional animals served as controls. Vascular compliance of the systemic circulation was calculated in intact animals from the changes in CVP after known changes in systemic blood volume. In control dogs, vascular compliance averaged 2.3 ml/mm Hg.kg body weight. During slow endotoxin infusion, cardiovascular effects were measurable only after a certain period of time had elapsed from the start of endotoxin insult and consisted of hypotension associated with systemic vasodilation. Systemic BP decreased gradually from 124 to 68 mm Hg while vascular compliance was finally increased by 100%, when compared to control values. This latter rise was responsible for a reduction in the cardiac preloads. Pulmonary wedge pressure and CVP were decreased from 7.1 to 3.4 and from 4.5 to 2.6 mm Hg, respectively. However, parallel to the decrease in left ventricular preload, endotoxin induced a progressive decrease in left ventricular afterload. Because of the balance in ventricular loading, cardiac output remained almost unchanged. After volume loading (dextran 30 ml/kg), cardiac output was remarkably increased from 3.28 to 6.24 L/min.m2 while peripheral vasodilation was not affected by this maneuver. It is concluded that low dose endotoxin infusion induces in dogs a hemodynamic pattern similar to human sepsis. The left ventricular loading changes are related to an enhanced systemic vascular compliance from 2.3 to 4.5 ml/mm Hg.kg. High flow shock state is encountered provided peripheral blood pooling is compensated by adequate volume replacement. [less ▲]

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See detailCorrelation between the Sexually Dimorphic Aromatase of the Preoptic Area and Sexual Behavior in Quail: Effects of Neonatal Manipulations of the Hormonal Milieu
Balthazart, Jacques ULg

in Archives Internationales de Physiologie et de Biochimie (1989), 97(6), 465-81

The aromatase of the preoptic area is significantly more active in males than in females. This sex dimorphism in enzyme activity is still found in birds that have been gonadectomized and treated with a ... [more ▼]

The aromatase of the preoptic area is significantly more active in males than in females. This sex dimorphism in enzyme activity is still found in birds that have been gonadectomized and treated with a same dose of testosterone. This suggests that the sex difference is not the result of a differential activation by the adult hormonal environment but rather is organized neonatally by steroid hormones. As the central aromatization of testosterone is a limiting step in the activation of copulatory behavior by testosterone, the lower aromatase activity in the preoptic area of females might be responsible, at least in part, for their lower sensitivity to the activating effects of testosterone on behavior. Three experiments were carried out to determine whether early manipulations of the hormonal environment, which are known to differentiate sexual behavior, also affect in a permanent way the aromatase activity in the preoptic area. Injection of estradiol benzoate into male embryos on day 9 of incubation decreased the preoptic aromatase activity in parallel to its demasculinizing effect on behavior. Unexpectedly the same treatment tended to increase enzyme activity in females so that the physiological relevance of the observed enzymatic change remains questionable. In two independent experiments, we confirmed that neonatal ovariectomy of female quail interferes with their behavioral differentiation. Females gonadectomized at 4 days post-hatch showed significantly more male-type sexual behavior as adult in response to testosterone than females gonadectomized at the age of 5 weeks. These experiments also confirmed that the preoptic aromatase activity is higher in males than in females but no evidence for an effect of the age of gonadectomy on the enzyme activity could be obtained. The sex difference and experimental modifications observed in the aromatase activity of the preoptic area were not seen in the posterior hypothalamus demonstrating that these effects are specific. The mechanisms controlling the sex difference in aromatase activity are discussed. The difference might be organized by the action of embryonic steroids as suggested by the changes observed in males injected with estradiol benzoate in egg. Alternatively, activational mechanisms cannot be ruled out at present. In one experiment, the activity of the preoptic aromatase was positively correlated with the sexual activity of the birds.(ABSTRACT TRUNCATED AT 400 WORDS) [less ▲]

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See detailEvaluation quantitative par échocardiographie de la morphologie cardiaque du veau en croissance.
Amory, Hélène ULg

Scientific conference (1989, December)

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See detailSous le Swing de la Croix
Sacré, Robert ULg

in Prologue (1989), (224), 28-29

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See detailHenry Gray, mi piccolo chiamano Henry
Sacré, Robert ULg

Article for general public (1989)

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See detailThe influence of behavioural states on cerebral blood flow velocity patterns in stable preterm infants.
RAMAEKERS, Vincent ULg; Casaer, P.; Daniels, H. et al

in Early human development (1989), 20(3-4), 229-46

Previous Doppler ultrasound studies assessing cerebral blood flow velocities in the anterior cerebral artery (ACA) among healthy term and preterm infants, showed a widespread range for the calculated flow ... [more ▼]

Previous Doppler ultrasound studies assessing cerebral blood flow velocities in the anterior cerebral artery (ACA) among healthy term and preterm infants, showed a widespread range for the calculated flow indices. However, only one of these studies accounted for the infant's behavioural state. In the present study a stable pattern of the cerebral blood flow velocity tracings and of the Pulsatility Index (PI) was observed during state 1, whereas marked fluctuations in cerebral blood flow velocity and PI were found during state 4 or active wakefulness. During state 2, minor variations of cerebral blood flow velocity and PI occurred though tended to be less pronounced than during active wakefulness. Thus at the time of Doppler assessment the cerebral blood flow velocity pattern and its variability will be better understood by taking into account the behavioural state of the infant. [less ▲]

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See detailMalaco A Big Black Roster
Sacré, Robert ULg

in Soul Bag (1989), (118),

MALACO RECORDS, Jackson, Mississippi : Rencontre avec Tommy Couch, Dave Clark, etc.... et interviews ( en coll.) : Photo Dave Clark

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