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See detailStructure and Beneficiation of a rich gold ore
Ek, Corneille; Pirard, Eric ULg; Baguette, Luc

in ATB Métallurgie (1991), 1-2

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See detailThe triviality of abortion in Greece
Naziri, Despina ULg

in Planned Parenthood in Europe = Planning Familial en Europe (1991), 20(2), 12-14

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See detailUne évolution inéluctable
Reginster, Jean-Yves ULg

in Jeune Pratique (1991), 50

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See detailColocalization of immunoreactive oxytocin, vasopressin and interleukin-1 in human thymic epithelial neuroendocrine cells
Robert, Françoise; Geenen, Vincent ULg; Schoenen, Jean ULg et al

in Brain, Behavior & Immunity (1991), 5

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See detailUn cas de syndactylie chez le chien
RENOY, Philippe ULg; Balligand, Marc ULg

in Annales de Médecine Vétérinaire (1991)

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See detailPerspectives diagnostiques et thérapeutiques de l'érythropoïétine
Beguin, Yves ULg; Sautois, Brieuc ULg; Fillet, Georges ULg

in Médecine et Hygiène (1991), 49

L'érythropoïétine est une hormone produite par le rein en réponse à une hypoxie rénale et qui stimule l'activité érythropoïétine de la moelle osseuse. Le dosage de l'érythropoïétine sérique, toujours ... [more ▼]

L'érythropoïétine est une hormone produite par le rein en réponse à une hypoxie rénale et qui stimule l'activité érythropoïétine de la moelle osseuse. Le dosage de l'érythropoïétine sérique, toujours interpété en fonction de l'hématocrite circulante, est utilise dans le diagnostic différentiel des polyglobulies et dans certains cas particuliers d'anémie. L'utilisation thérapeutique de l'érythropoïétine recombinée a permis de corriger l'anémie de l'insuffisance rénale chronique et est actuellement étudiée dans d'autres indications. [less ▲]

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See detailLes inventaires forestiers nationaux en Europe: tentative de synthese.
Lecomte, Hugues; Rondeux, Jacques ULg

in Silva Belgica (1991), 98(6), 41-50

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See detailTruncal Vagotomy and Pyloroplasty Combined with Valvular Replacement in Patients with Ulcer Disease
Defraigne, Jean-Olivier ULg; Innocenti, C.; DEKOSTER, Guy ULg et al

in Journal of Cardiovascular Surgery (The) (1991), 32(1), 42-5

In 1988, 5 patients (3 men and 2 women) with ulcer disease (mean age 56 +/- 8 years) underwent valvular replacement for aortic (No. = 4) or mitral disease (No. = 1). All patients had had gastroduodenal ... [more ▼]

In 1988, 5 patients (3 men and 2 women) with ulcer disease (mean age 56 +/- 8 years) underwent valvular replacement for aortic (No. = 4) or mitral disease (No. = 1). All patients had had gastroduodenal ulcers. Preoperative gastroscopy demonstrated active ulcers (No. = 4) and a healed pyloric ulcer with pyloric stenosis (No. = 1). Despite the presence of ulcers, a non-biologic prosthesis was preferred in each patient because of their young age (No. = 3), chronic atrial fibrillation requiring anticoagulant therapy (No. = 1), and refusal of the eventuality of subsequent reoperation (No. = 1). In each patient, a truncal vagotomy with pyloroplasty was performed simultaneously with the valvular procedures by the same incision. The postoperative courses were uneventful. With a mean follow-up of 15 +/- 3 months, no gastrointestinal bleeding was observed during anticoagulant therapy. With anticoagulant drugs, bleeding may occur with a frequency of 4% per patient treatment-year, half of which are gastrointestinal in origin. Nevertheless, in selected patients with gastroduodenal ulcers, performing a vagotomy-pyloroplasty simultaneously with valvular replacement allows implantation of a non-biologic prosthesis, with greater durability than bioprosthesis. [less ▲]

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See detailThrombocytopénie allergique à la nitrofurantoïne
Sautois, Brieuc ULg; Mélon, P.; Grek, V. et al

in Revue Médicale de Liège (1991), 46

Nous rapportons le dixième cas de thrombocytopénie à la nitrofurantoïne. Trois épisodes successifs sont décrits chez la même patiente, s'accompagnant de frissons et d'une thrombocytopénie extrême. La ... [more ▼]

Nous rapportons le dixième cas de thrombocytopénie à la nitrofurantoïne. Trois épisodes successifs sont décrits chez la même patiente, s'accompagnant de frissons et d'une thrombocytopénie extrême. La récupération hématologique est rapide à l'arrêt du médicament (retour à 150 000 plaquettes après 3 à 4 jours), en rapport avec la demi-vie plasmatique brève de la nitrofurantoïne. [less ▲]

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See detailA method to compute reactive power margins with respect to voltage collapse
Van Cutsem, Thierry ULg

in IEEE Transactions on Power Systems (1991), 6

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See detailThe clonidine test in posttraumatic stress disorder.
Hansenne, Michel ULg; Pitchot, William ULg; Ansseau, Marc ULg

in American Journal of Psychiatry (The) (1991), 148(6), 810-1

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See detailEvidence of West European defined miospore zones in the Uppermost Devonian and Lower Carboniferous of the Amazonas Basin (Brazil).
Loboziak, S; Streel, Maurice ULg; Caputo, M.V. et al

in Geobios (1991), 24(1), 5-11

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See detailEtude régionale par éléments finis d'une nappe libre située dans les craies du Crétacé en Belgique
Dassargues, Alain ULg; Monjoie, Albéric ULg; Lambert, J. M. et al

in Revue des Sciences de l'Eau = Journal of Water Science (1991), 4

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See detailHierarchy and scales in marine ecohydrodynamics
Nihoul, Jacques ULg; Djenidi, Salim ULg

in Earth-Science Reviews (1991), 31(3-4), 255-277

Recent investigations reveal, in marine ecosystems, an ecohydrodynamic hierarchical organization resulting from the different rates of ecological processes confronted to a multi-scale physical environment ... [more ▼]

Recent investigations reveal, in marine ecosystems, an ecohydrodynamic hierarchical organization resulting from the different rates of ecological processes confronted to a multi-scale physical environment. Major marine hydrodynamic processes are briefly analyzed here in an ecohydrodynamic perspective, emphasizing the effects they have on ecosystems at different levels of hierarchy and identifying appropriate “spectral windows” for modelling. A case study application to the Northern Bering Sea's Summer Ecohydrodynamics is given in illustration. [less ▲]

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See detailFluid inclusions in charnockites from the Bjerkreim-Sokndal massif (Rogaland, southwestern Norway): fluid origin and in situ evolution
Wilmart, Edith; Clocchiatti, Robert; Duchesne, Jean-Clair ULg et al

in Contributions to Mineralogy & Petrology (1991), 108

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See detailGeotechnical properties of the Quaternary sediments in Shanghai
Dassargues, Alain ULg; Biver, Pierre; Monjoie, Albéric ULg

in Engineering Geology (1991), 31(1), 71-90

The subsoil of Shanghai is composed of Quaternary sediments of the Yangtse River estuary. The center of the city has undergone a man-induced subsidence due to water pumping in the confined multi-aquifer ... [more ▼]

The subsoil of Shanghai is composed of Quaternary sediments of the Yangtse River estuary. The center of the city has undergone a man-induced subsidence due to water pumping in the confined multi-aquifer system located in these sediments. Together with a sedimentological study of the post-Pleistocene conditions of deposition and accumulation, an accurate geotechnical study has been completed on the basis of all the available data from identification, oedometer and triaxial tests. Size analysis, X-ray analysis, compressibility characteristics, void ratio, preconsolidation pressures, permeabilities are considered taking into account the sedimentary sequence. Some relations between parameters are deduced and the hydrodynamic parameters are related to compaction parameters in order to predict their coupled and non-linear effects on the subsidence phenomena. Conclusions consist in the determination of the zones where different sensitivities to compaction are evaluated in these Quaternary formations. [less ▲]

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See detailLes inventaires forestiers nationaux en Europe: tentative de synthèse.
Lecomte, Hugues; Rondeux, Jacques ULg

in Silva Belgica (1991), 98(4), 13-19

Dans de nombreux pays, la forêt est une ressource naturelle importante et au niveau mondial, les problèmes d'approvisionnement en bois se posent avec de plus en plus d'acuité. Le développement des ... [more ▼]

Dans de nombreux pays, la forêt est une ressource naturelle importante et au niveau mondial, les problèmes d'approvisionnement en bois se posent avec de plus en plus d'acuité. Le développement des populations et de leurs besoins en bois a fait prendre conscience de la nécessité de gérer ce patrimoine de façon responsable, sous peine de le voir s'appauvrir, voire même disparaître dans des proportions inquiétantes. Assez paradoxalement, ce sont les pays riches en "or vert" qui ont innové dans ce domaine (Suède, Finlande, Canada,...). Mais comment gérer une ressource aussi étendue et diversifiée sans se doter des moyens de la connaître ? A ce titre, un inventaire réalisé à l'échelle des nations est devenu indispensable. Dans les lignes qui suivent, nous tenterons de faire le point sur les approches méthodologiques propres aux inventaires forestiers nationaux (ou régionaux) et nous évoquerons différentes réalisations concrètes actuellement en vigueur dans plusieurs pays, principalement ceux à tradition forestière. [less ▲]

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See detailLa surveillance de l'état de l'environnement wallon par bioindicateurs.
Goffart, Philippe; Dufrêne, Marc ULg; Marchal, Didier

in Gomphus (1991), 7

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See detailMolecular inhibition of cancer cell invasion and metastasis.
Castronovo, Vincenzo ULg; Stetler-Stevenson, W. G.; Sobel, M. E. et al

in Princess Takamatsu Symposia (1991), 22

A group of coordinated cellular processes, not just one gene product, is responsible for invasion and metastasis, the most life-threatening aspect of cancer. It is now recognized that negative factors may ... [more ▼]

A group of coordinated cellular processes, not just one gene product, is responsible for invasion and metastasis, the most life-threatening aspect of cancer. It is now recognized that negative factors may be just as important as positive elements. Genetic changes causing an imbalance of growth regulation lead to uncontrolled proliferation necessary for both primary tumor and metastasis expansion. However, unrestrained growth does not, by itself, cause invasion and metastasis. This phenotype may require additional genetic changes. Thus, tumorigenicity and metastatic potential have both overlapping and separate features. Invasion and metastasis can be facilitated by proteins which stimulate tumor cell attachment to host cellular or extracellular matrix determinants, tumor cell proteolysis of host barriers, such as the basement membrane, tumor cell locomotion, and tumor cell colony formation in the target organ for metastasis. Facilitory proteins may act at many levels both intracellularly and extracellularly, but are counterbalanced by factors which can block their production, regulation or action. A common theme has emerged: in addition to loss of growth control, an imbalanced regulation of adhesion, proteolysis, and motility appears to be required for invasion and metastasis. Re-equilibrating the expression of the genes involved in these tumor invasion related events could potentially constitute the basis for new anti-cancer therapeutic strategies. [less ▲]

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See detailFantaisie verbale chez quelques monologuistes francophones
Defays, Jean-Marc ULg

in Bulletin Francophone de Finlande (1991), (7), 75-85

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See detailDescription de 70 souches d'Escherichia coli d'origine bovine possédant les gènes des vérotoxines
Pohl, P.; Daube, Georges ULg; Lintermans, P. et al

in Annales de Médecine Vétérinaire (1991), 135

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See detailLa rentabilite du triticale
Cors, François; Bodson, Bernard ULg; Falisse, André ULg

in Bulletin des Recherches Agronomiques de Gembloux (1991), 26(4), 519-535

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See detailA Saint-Trond, un import-export de reliques des Onze Mille Vierges dans la seconde moitié du XIIIe siècle
George, Philippe ULg

in Bulletin de la Société Royale Le Vieux-Liège (1991), t. XII, n° 253

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See detailÉtude hydrodynamique d'un fermenteur airlift adapté pour le mode de fonctionnement fed-batch
Groslambert, Sylvie ULg; Schlitz, Marc; Crine, Michel ULg

in Récents Progrès en Génie des Procédés (1991), 5(16), 11-16

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See detailQuantitative turbidimetric assay for determining myoglobin evaluated.
Delanghe, J.; Chapelle, Jean-Paul ULg; el Allaf, M. et al

in Annals of Clinical Biochemistry (1991), 28 ( Pt 5)

A recently introduced turbidimetric immunoassay using shell/core particles for determination of myoglobin (Turbiquant Myoglobin, Behringwerke, Marburg, Germany) was evaluated on the Behring Turbitimer ... [more ▼]

A recently introduced turbidimetric immunoassay using shell/core particles for determination of myoglobin (Turbiquant Myoglobin, Behringwerke, Marburg, Germany) was evaluated on the Behring Turbitimer analyzer. Intra-assay CV varied between 1.0% and 3.2%; interassay CV was between 2.0% and 3.6%. Linear results were obtained between 2.8 nmol/L and 36.7 nmol/L. Manual dilution in saline solution allowed measurement of myoglobin concentrations up to 25,400 nmol/L. In the tested range, no high-dose 'hook' effect was observed. Haemolysis interfered with the assay when haemoglobin concentrations exceeded 2 g/L. The occurrence of error codes due to the presence of triglycerides was shown to depend on particle size. Repeat assays on diluted samples were necessary at triglyceride concentrations of 2.3 mmol/L for post-prandial chylomicrons (200-1000 nm), and at 11-31 mmol/L for very-low density lipoprotein-triglycerides (80-200 nm). No significant interferences of haptoglobin, bilirubin, iodine containing contrast media, and rheumatoid factors were detected for the assay. Treatment of lipaemic samples with Lipoclean (Behringwerke) resulted in lower myoglobin values. Simultaneously drawn serum and heparin-plasma samples gave comparable myoglobin results. However, values obtained in EDTA- or citrate-treated plasma samples occasionally differed significantly from serum values. The upper reference limit for myoglobin concentration was 4.2 nmol/L. The turbidimetric assay correlated well with a radioimmunoassay (Byk-Sangtec; r = 0.892) and with the automated nephelometric assay (Behringwerke; r = 0.944). Values obtained by turbidimetry were comparable to those obtained by the latex agglutination test (Behringwerke). [less ▲]

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See detailMacromolecular engineering of lactone-based (co)polymers for biomedical applications
Dubois, Philippe ULg; Grandfils, Christian ULg; Jérôme, Robert ULg et al

in Polymer Chemistry (1991), 32 (1)

Ring-opening polymerization of epsilon-caprolactone and lactides by aluminum alkoxides allows aliphatic polyesters to be tailored at will and fitted to requirements for biomedical applications ... [more ▼]

Ring-opening polymerization of epsilon-caprolactone and lactides by aluminum alkoxides allows aliphatic polyesters to be tailored at will and fitted to requirements for biomedical applications, particularly for controlled drug delivery systems. Variation in molecular weight controls the effective life time of microspheres or implants in vivo. Block copolymerization leads to microphase separated materials and opportunity to modify the overall release kinetics and to get, for instance, a zero-order. Macromonomers and dimacromonomers are ideal precursors for physically and chemically stabilized hydrogels, respectively. Dimacromonomers can actually generate amphiphilic networks. [less ▲]

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See detailPolarization correction to the electrostatic potential at the CNDO and theab initio level. Influence of the basis set expansion
Dehareng, Dominique ULg; Dive, Georges ULg; Ghuysen, Jean-Marie ULg

in Theoretica Chimica Acta (1991), 79(2), 141-152

The influence of the basis set on the electrostatic potential corrected for polarization has been studied for H2S, CH3SH and COHCH2SH. The position and deepness of the minima and the height of the barrier ... [more ▼]

The influence of the basis set on the electrostatic potential corrected for polarization has been studied for H2S, CH3SH and COHCH2SH. The position and deepness of the minima and the height of the barrier between symmetric minima is discussed at both the deorthogonalized CNDO/2 and ab initio levels within STO-3G, 3-21G, 4-31G, 6-31G and 6-311G basis sets. The calculation of the electrostatic potential and corrected one using CNDO deorthogonalized coefficients including 3d orbitals has been applied at the first time on sulfur-containing molecules. The influence of polarization and diffuse functions has also been analysed and the incidence of the polarization correction on the relative proton affinity in NH2(CH2)3NHCH3 and in the adenine molecule has been investigated at the CNDO and ab initio levels. At both levels, the relative proton affinity of several basic sites in the same molecule can be qualitatively expressed without inclusion of the polarization correction except in the case of substituted amines. [less ▲]

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See detailDaily Seasonalities on the Brussels Spot Equity Market
Corhay, Albert ULg

in Cahiers Economiques de Bruxelles (1991), (132), 415-430

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See detailDoes environmental exposure to cadmium represent a health risk? Conclusions from the Cadmibel Study.
Lauwerys, R.; Bernard, A.; Buchet, J.-P. et al

in Acta Clinica Belgica (1991), 46

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See detailAntiinflammatory Prodelphinidins from Black Currant (Ribes nigrum) Leaves
Tits, Monique ULg; Angenot, Luc ULg; Damas, Jacques ULg et al

in Planta Medica (1991), 57(Supplement issue 2), 134

In a study to select anti-inflammatory medicinal plants, we have observed that extracts of Ribes nigrum significantly inhibited at a dose of 50mg/kg i.p. the carrageenan rat paw edema. We have now proved ... [more ▼]

In a study to select anti-inflammatory medicinal plants, we have observed that extracts of Ribes nigrum significantly inhibited at a dose of 50mg/kg i.p. the carrageenan rat paw edema. We have now proved that the most active fractions contained proanthocyanidins . In the present study, we report on the isolation of three bioactive compounds: two prodelphinidins dimers and a new trimeric one. [less ▲]

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See detailEntre Meuse, Rhin et Moselle. Aux origines du culte de saint Mengold de Huy
George, Philippe ULg

in Publications de la Section Historique de l'Institut Royal Grand-Ducal de Luxembourg (1991)

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See detailLaparoscopic management of large ovarian endometrial cyst: use of fibrin sealant.
Donnez, Jacques; NISOLLE, Michelle ULg

in Journal of Gynecologic Surgery (1991), 7(3), 163-6

In order to prevent postoperative adhesions often present after CO 2 laser vaporization of large endometriomas, 62 patients with endometriomas greater than 3 cm diameter were treated with a new procedure ... [more ▼]

In order to prevent postoperative adhesions often present after CO 2 laser vaporization of large endometriomas, 62 patients with endometriomas greater than 3 cm diameter were treated with a new procedure. Partial cystectomy was performed using the CO 2 laser. Residual endometrial cyst was then vaporized. After laparoscopic vaporization of the interior cyst wall, a fibrin glue (Tissucol) was injected onto the vaporized area to close laparoscopically the ovarian cyst cavity. When performed, second-look laparoscopy demonstrated healing of the ovary without any periovarian adhesions. The incidence of periovarian adhesions was significantly lower (p less than 0.01) than in the group of women treated by laparoscopy and in whom the glue was not used to close the ovarian cyst cavity. [less ▲]

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See detailMICROSCOPIC RHEOLOGICAL MODELS AND EXTENDED IRREVERSIBLE THERMODYNAMICS
Dauby, Pierre ULg; Lebon, Georgy ULg

in Applied Mathematics Letters (1991), 4(6), 39-43

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See detailA Note On The Rate Of Passage Of Digesta In Pigs Ileo-Rectostomized Or Fitted With An Ileal T-Cannula
Leterme, Pascal; Pirard, L.; Thewis, André ULg et al

in Animal Production (1991), 53(2), 253-256

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See detailAller en pèlerinage à Saint-Martin de Tours au XVIIIe siècle
George, Philippe ULg

in Bulletin de la Société Royale Le Vieux-Liège (1991), t. XII, n° 261

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See detailSequence analysis of the ARG7 gene of Schizosaccharomyces pombe coding for argininosuccinate lyase. Expression of the gene in Saccharomyces cerevisiae.
Loppes, Roland ULg; Michels, R; Decroupette, I et al

in Current Genetics (1991), 19(4), 255-60

The complete nucleotide sequence of the ARG7 gene, coding for argininosuccinate lyase (EC 4.3.2.1), in the fission yeast (Schizosaccharomyces pombe) has been determined. It consists of an open reading ... [more ▼]

The complete nucleotide sequence of the ARG7 gene, coding for argininosuccinate lyase (EC 4.3.2.1), in the fission yeast (Schizosaccharomyces pombe) has been determined. It consists of an open reading frame of 461 codons. The deduced protein has a molecular weight of 51,200 Da. The gene is devoid of introns which is confirmed by the fact that it is expressed in Escherichia coli after spontaneous insertion of a bacterial sequence probably bearing a prokaryotic promoter. A perfect "TATA" box is found at -72 and the major transcription initiation site in Saccharomyces cerevisiae is located at -11 as shown by primer extension experiments. Comparison of the S. pombe lyase with related proteins from other organisms reveals an important degree of conservation except in the carboxyterminal part of the polypeptide. Additionally, a deletion removing 66 amino acids of the carboxy terminus yields an enzyme exhibiting some biological activity. A unique 1,500 b transcript was found in S. cerevisiae when the intact gene was present, but the deleted version of the gene gave rise to at least three transcripts of 1,800, 2,800 and 3,900 b. [less ▲]

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See detailHigh temperature crossover in paraconductivity of granular Y1Ba2Cu3O7-y
Ausloos, Marcel ULg; Gillet, François ULg; Laurent, Christian et al

in Zeitschrift für Physik. B, Condensed Matter (1991), 84(1), 13-16

We have examined the deviation from linearity of the temperature dependence of the electrical resistivity of a YBaCuO ceramics. We have observed at high temperature a crossover behavior toward a ... [more ▼]

We have examined the deviation from linearity of the temperature dependence of the electrical resistivity of a YBaCuO ceramics. We have observed at high temperature a crossover behavior toward a logarithmic temperature dependence at lower temperature. It seems relevant to attribute the origin of such a term to a pair breaking mechanism contribution, thus to give a lower bound to the existence of superconductivity fluctuations onset temperature. Our findings also implies that carriers are bosons above T(c). [less ▲]

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See detailTransient T and B cell activation after neonatal induction of tolerance to MHC class II and Mls alloantigens
Schurmans, Stéphane ULg; Brighouse, G.; Kramar, G. et al

in Journal of Immunology (1991), 146

The neonatal injection of semiallogeneic F1 spleen cells into newborn parental mice results in the induction of tolerance to the corresponding alloantigen (alloAg) and chimerism. In these F1 cell-injected ... [more ▼]

The neonatal injection of semiallogeneic F1 spleen cells into newborn parental mice results in the induction of tolerance to the corresponding alloantigen (alloAg) and chimerism. In these F1 cell-injected mice, we have previously observed that this state of specific tolerance is associated with the development of a transient lupus-like autoimmune syndrome. In this study, we show that neonatal injection of mice with spleen cells differing from the host at major histocompatibility complex (MHC) class I, class II, class (I + II), or minor lymphocyte stimulating (Mls) alloAg induced a state of specific tolerance characterized by the absence of alloreactive CTL and/or Th cell responses in the spleen and the thymus of 6- to 12-week-old injected mice. However, in mice rendered tolerant to MHC class II or class (I + II) alloAg, the presence of high levels of IgG1 antibodies, of circulating immune complexes, of anti-ssDNA autoantibodies, and of tissue lesions were transiently observed. In these mice, an increased Ia Ag expression on lymphoid spleen cells was also detected at 1 wk. The elevated production of IgG1 and the overexpression of Ia Ag were almost completely prevented by treatment with an anti-IL-4 mAb. Such manifestations of B cell activation and autoimmunity were not observed in mice neonatally injected with F1 cells differing from the host only at MHC class I Ag. In mice neonatally tolerized to Mls Ag, a transient increase in IgG2a production and an overexpression of Ia Ag were detected without features of autoimmunity, and were prevented by anti-INF-gamma mAb treatment. In mice rendered tolerant to MHC class II, class (I + II), or Mls alloAg at birth, the manifestations of B cell activation were associated with the presence of in vivo-activated alloreactive CD4+ T cells in the spleen--but not the thymus--of 1-wk-old injected mice. Together, these results suggest that in mice neonatally injected with semiallogeneic F1 cells, the process of tolerance induction is not efficient during the early postnatal period, and could allow the maturation and peripheralization of some alloreactive CD4+ T cells, leading to transient B cell activation and, depending on the alloAg, to autoimmunity [less ▲]

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See detailManagement of small woods in Belgium.
Rondeux, Jacques ULg

in Quarterly Journal of Forestry (1991), 85(1), 37-42

In Belgium, forest occupies 20 per cent of the total land area. Private forests account for about 52 per cent; they are generally small (averaging about three ha) and their owners are not accustomed to ... [more ▼]

In Belgium, forest occupies 20 per cent of the total land area. Private forests account for about 52 per cent; they are generally small (averaging about three ha) and their owners are not accustomed to basing their decisions on a management plan. However, some attempts to develop co-operation through forestry associations exist and the regional authorities tend to encourage them. Whatever the details of any possible future legislation may be, the principal aim must be the development and introduction of an extremely simple form of management plan (the so-called 'plan simple de gestion') in exchange for assistance to the private owner. [less ▲]

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See detailThe glucocorticoid receptor.
Muller, Marc ULg; Renkawitz, R.

in Biochimica et Biophysica Acta (1991), 1088

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See detailModélisation mathématique de la nappe alluviale de la Meuse en aval de Liège (Belgique)
Dassargues, Alain ULg; Lox, André

in CHO-TNO Reports and notes (The Netherlands) (1991), (26), 27-54

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See detailNouvelles données sur la bande de Sambre-et-Meuse à Ombret (Huy, Belgique)
Hance, Luc ULg; Steemans, Philippe ULg; Goemaere, E et al

in Annales de la Société Géologique de Belgique (1991), 114(1), 253--264

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See detailCompte-rendu de Willibrord
George, Philippe ULg

in Moyen Age (Le) (1991)

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See detailFaire partie d’une association, aujourd’hui : qui sont les jeunes qui participent, au Québec, en France et en Belgique ?
Fournier, Bernard ULg

in Égalité ; revue acadienne d’analyse politique (1991), 30(automne), 39-67

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See detailNature of the late potentials and F-ratio values in dogs
Poncelet, Luc; Balligand, Marc ULg

in Research in Veterinary Science (1991)

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See detailBeams and Jets in Astrophysics -- Philip A. Hughes
Manfroid, Jean ULg

in Ciel et Terre (1991), 107

Not Available

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See detailLe douglas en Belgique: premiers résultats d'une étude intégrée.
Rondeux, Jacques ULg; Laurent, C.; Thibaut, André ULg et al

in Silva Belgica (1991), 98(5), 29-35

La place occupée aujourd’hui par le douglas (Pseudotsuga menziesii (Mirb.) Franco) dans la sylviculture belge méritait qu’une étude aussi complète que possible lui soit consacrée. Depuis 1985, grâce à ... [more ▼]

La place occupée aujourd’hui par le douglas (Pseudotsuga menziesii (Mirb.) Franco) dans la sylviculture belge méritait qu’une étude aussi complète que possible lui soit consacrée. Depuis 1985, grâce à l’aide de l’I.R.S.I.A., le Département des Eaux et Forêts de la Faculté des Sciences Agronomiques de Gembloux s’est attaché à étudier cette essence dans 3 directions complémentaires : - la productivité des peuplements, exprimée au moyen de modèles de croissance et de tables de production à sylvicultures variables ; - la confection d’une matrice d’aptitude, reflet des potentialités de l’essence en fonction des conditions stationnelles ; - la qualité technologique du bois, traduite par ses principales propriétés physiques et mécaniques. Pour l’essentiel, cette étude intégrée analyse donc sous les angles quantitatifs et qualitatifs la production ligneuse du douglas en vue de fournir des éléments indispensables à sa sylviculture, à la prévision de sa production et à la valorisation de son bois. Eu égard à l’état d’avancement de nos travaux et à l’intérêt manifesté par les candidats reboiseurs pour cette essence, nous avons jugé qu’il était utile de communiquer les premiers résultats ou tendances observés dans les différents domaines précités. Nous envisagerons d’abord l’importance actuelle du douglas en termes de surfaces occupées (paragraphe 2), nous présenterons le matériel de base de l’étude (paragraphe 3) et quelques milieux de croissance typiques (paragraphe 4). Nous fournirons ensuite un ensemble de données relatives à ses capacités de production (paragraphe 5) et évoquerons quelques résultats issus d’analyses exploratoires portant sur la qualité de son bois (paragraphe 6). [less ▲]

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See detailEvolution des pressions en oxygène et en dioxyde de carbone et du pH du sang artériel pendant la croissance
Bakima, M.; Lomba, F.; Lekeux, Pierre ULg

in Annales de Médecine Vétérinaire (1991), 135

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See detailDiversity of the Mechanisms of Resistance to Beta-Lactam Antibiotics
Frère, Jean-Marie ULg; Joris, Bernard ULg; Granier, B. et al

in Research in Microbiology (1991), 142(6, Jul-Aug), 705-10

The sensitivity of a bacterium to beta-lactam antibiotics depends upon the interplay between 3 independent factors: the sensitivity of the essential penicillin-binding enzyme(s), the quantity and ... [more ▼]

The sensitivity of a bacterium to beta-lactam antibiotics depends upon the interplay between 3 independent factors: the sensitivity of the essential penicillin-binding enzyme(s), the quantity and properties of the beta-lactamase(s) and the diffusion barrier that the outer-membrane of Gram-negative bacteria can represent. Those three factors can be modified by mutations or by the horizontal transfer of genes or portions of genes. [less ▲]

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See detailRelease of N2,3-ethanoguanine from haloethylnitrosourea-treated DNA by Escherichia coli 3-methyladenine DNA glycosylase II
Habraken, Yvette ULg; Carter, C.; Sekiguchi, M. et al

in Carcinogenesis (1991), 12(10), 1971-1973

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See detailIntérêt de l'enfant et paiement des pensions alimentaires après divorce en Belgique
Bawin-Legros, Bernadette; Gauthier, Anne; Guillaume, Jean-François ULg

in Population : Revue Trimestrielle de l'Institut National d'Etudes Démographiques (1991), 4

This paper is a study of parental behaviour, and more particularly that of fathers, after divorce, in which findings from a national survey carried out in Belgium are used. The payment of alimony is ... [more ▼]

This paper is a study of parental behaviour, and more particularly that of fathers, after divorce, in which findings from a national survey carried out in Belgium are used. The payment of alimony is considered to be not solely a financial solution, but as an indication of a certain acceptance of parental responsibility which is rooted in the marriage and family background that existed before the couple separated. Legal practise, which generally gives care and control of the child to the mother, also results in the continuity of the traditional type of the division of labour between the parents after their marriage has broken down. This supports the moral principle of a privileged mother-child relationship, but may also lead to a deterioration in the living standards of the mothers' households. [less ▲]

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See detailGénérations et politique, sous la direction de Jean Crête et Pierre Favre (compte rendu)
Fournier, Bernard ULg

in Revue Québécoise de Science Politique (1991), 20(automne), 163-168

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See detailVariations saisonnières du régime alimentaire du chevreuil (Capreolus capreolus) en Haute Belgique
Degrez, Irma; Libois, Roland ULg

in Cahiers d'Ethologie (1991), 11(1), 17-30

In Belgium, information related to the deer food are quite uncommon and, as far as the roe deer is concerned, restricted to the hunting season (autumn). Our study was conducted in two areas of southern ... [more ▼]

In Belgium, information related to the deer food are quite uncommon and, as far as the roe deer is concerned, restricted to the hunting season (autumn). Our study was conducted in two areas of southern Belgium. The first, in Hotton (50°15 N, 5°27E) is a mixed oak-beech forest with a important cover of brambles. Faeces samples were collected monthly from October 1987 to September 1988. The second area, inside the Nature reserve of "Les Hautes Fagnes" (50°30N, 6°06 E; 600 m) is an old peat-bog (Eriophorum vaginatum, Molinia coerulea, Vaccinium myrtillus and V. uliginosum) surrounded by spruce plantations. Sampling took place there only in April and in June 1989. Faeces were boiled and filtered before digestion in the Scharrer- Kurschner mixture for 30 min. Then samples were sieved under water and a small amount taken and mounted on a slide for microscopic observation. More than 13,000 small vegetal pieces were identified to the species by comparison between the observed epidermal features and a reference collection of plant epidermis. Woody plants are the main food of the roe deer in both areas: in the Hautes Fagnes, heather (Calluna vulgaris) and bilberry (Vaccinium) are the main food items whereas in Hotton, brambles are the most important part the diet in each season. In Hotton, we found that the diet was much more diversified during the green season than in the winter. The winter diet comprises mainly brambles but also heather an Vaccinium myrtillus in low quantities. Spruce needles are present only at the end of the winter. In the spring, grasses were taken but their contribution to the food of the deer was never important. During the summer, the roe deer ate more tree leaves (Quercus robur and Sorbus aucuparia). In the Hautes Fagnes, grasses were important only in the spring diet and tree leaves (Sorbus) in the summer. Some tree species were very common in both study areas (beech and spruce saplings) but nearly not eaten. The roe deer can thus considered as a selective feeder preferring high quality foods (spring grasses or young leaves) to bulky one (old grasses or hard leaves). [less ▲]

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See detailImmunohistochemical expression of epidermal growth factor receptors in nuclei of a subpopulation of keratinocytes and sweat gland cells.
Pierard, Claudine ULg; Colige, Alain ULg; Arrese Estrada, Jorge ULg et al

in Dermatologica (1991), 183(1), 7-9

We have raised a polyclonal antibody to the 170-kD epidermal growth factor receptor. We found an intercellular pattern of immunoreactivity in the epidermis as well as a positivity of the cytoplasm of ... [more ▼]

We have raised a polyclonal antibody to the 170-kD epidermal growth factor receptor. We found an intercellular pattern of immunoreactivity in the epidermis as well as a positivity of the cytoplasm of keratinocytes and eccrine secretory cells. In some samples, a nuclear labelling was evidenced in these type of cells. There is a close resemblance in the topographical distribution of these cells with nuclear labelling and those synthesizing DNA under phytohaemagglutinin stimulation. [less ▲]

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See detailGeographic structure and potential ecological factors in Belgium
Dufrêne, Marc ULg; Legendre, P.

in Journal of Biogeography (1991), 18(3), 257-266

The available potential ecological factors have been scored in the form of presence/absence in Universal Transverse Mercator (UTM) squares in Belgium. A correspondence analysis shows a strong underlying ... [more ▼]

The available potential ecological factors have been scored in the form of presence/absence in Universal Transverse Mercator (UTM) squares in Belgium. A correspondence analysis shows a strong underlying gradient in the data set which induces an extraordinary horseshoe effect. This gradient follows closely the altitude component. Applying the k-means clustering method on UTM squares produced geographically compact groups which are largely hierarchically nested. This indicates strong regional trends in the ecological data set. As homogeneous groups may also be artefacts created by the clustering algorithms on a continuous gradient, the relevance of the borders between homogeneous areas is tested. In general, k-means borders correspond to the main breaking lines between adjacent UTM squares. They can be referred to as natural borders. -Authors [less ▲]

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See detailInfluence of Electronic Excitation in the Charge Reversal of halogenated Cations.
Leyh, Bernard ULg; Wankenne, H.

in International Journal of Mass Spectrometry and Ion Processes (1991), 107

Charge reversal of high kinetic energy (8keV) cations during collisions with atomic target gases (G=Xe, Kr, Ne) has been studied for CCln+ (n=1 or 2) ions resulting from dissociative electroionization of ... [more ▼]

Charge reversal of high kinetic energy (8keV) cations during collisions with atomic target gases (G=Xe, Kr, Ne) has been studied for CCln+ (n=1 or 2) ions resulting from dissociative electroionization of CCl4. The influence of electronic excitation of the incident cation CCln+ and of the nature of the target gas G on the anion yield have been examined. In our experiments, the two-collision process CCln+->CCln+G+->(CCln-)+2G+ is predominant. By comparing the anion and cation yields as a function of the kinetic energy of the ionizing electrons, we found evidence, with some target gases, of the existence of long-lived excited states of CCl+ and CCl2+, which lead to an increase in the anion yield in comparison with charge reversal of the correponding ground state ions. For CCl+, we deduce an excitation energy of 4+/-1 eV with a lifetime longer than 6.2 µs. These results are compatible with the a3Pi long-lived state of CCl+ previously detected by optical spectroscopy and by charge-stripping experiments. Our experimental data on charge reversal and metastable dissociation of CCl2+ reveal the existence of a long-lived state (lifetime>8.2 µs) of CCl2+ lying at 4.3+/-1 eV above the ground state.Semi-empirical MNDO calculations show that the energy of the first quartet state, a4A2, is compatible with the observed excitation energy. The spin-orbit coupling-induced transition from the a4A2 state to the B2A2 state is suggested to play an important role in the metestable dissociation CCl2+*->(CCl+)+Cl. The origin of the increase in the anion yield when long-lived excited states of CCl+ and CCl2+ are charge-reversed is discussed. Step a is suggested to be responsible for this yield enhancement which is observed when an appropriate target gas makes this step quasi-resonant. [less ▲]

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See detailA Densitometric Method for the Determination of Three Clinically Important Monosaccharides in Urine
Poukens-Renwart, Pascale; Angenot, Luc ULg

in Journal of Planar Chromatography (1991), 4(January/February), 77-79

A quantitative, densitometric, thin layer chromatographic method has been developed for the determination of three clinically important monosaccharides in ureine, after desalting.The analysis of these ... [more ▼]

A quantitative, densitometric, thin layer chromatographic method has been developed for the determination of three clinically important monosaccharides in ureine, after desalting.The analysis of these monosaccharides in urine allows to observe the potential changes induced by antiinflammatories in human small intestine permeability. Xylose, 3-O-methylglucose and rhamnose were estimated quantitatively in urine; arabinose was used as internal standard. The densitometry was performed at a wavelenght of 400 nm after a visualization reaction on HPTLC plates. In all cases, coefficients of variation of the method were less than 2.7%. [less ▲]

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See detailInduction expérimentale de la pneumonie pasteurellique chez la chèvre : étude des modifications physiopathologiques
Bakima, M.; Kaeckenbeeck, A.; Meniai, K. et al

in Annales de Médecine Vétérinaire (1991), 135

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See detailApplication of the GHER 3D general circulation model to the Western Mediterranean
Beckers, Jean-Marie ULg

in Journal of Marine Systems (1991), 1(4), 315-332

The GHER 3D k− OGCM is briefly described and its application to the Western Mediterranean Sea's specifities is discussed. The simulation of the Western Mediterranean General Circulation in typical winter ... [more ▼]

The GHER 3D k− OGCM is briefly described and its application to the Western Mediterranean Sea's specifities is discussed. The simulation of the Western Mediterranean General Circulation in typical winter conditions shows that the model is able to reproduce the main physical processes and the main trends of the general circulation. However, the detailed current patterns appears too sensitive to the choice of initial conditions and a better knowledge of these conditions is required for further routine forecasts. [less ▲]

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See detailSynthesis of high specificity tritium labelled chloroethylcyclohexylnitrosourea and its application to the study of DNA modification
Siew, E.; Habraken, Yvette ULg; Ludlum, D.

in Journal of the radiolabelled compounds and radiopharmaceuticals (1991), XXIX

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See detailMR1125988,Salmenjoki, Kimmo ,On numerical methods for shape design problems
Rochus, Pierre ULg

in Mathematical Reviews [=MR] (1991)

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See detailUne soeur aînée de la SNT: la ligue du Coin de Terre et du foyer insaisissable
Mougenot, Catherine ULg

in Cahiers de l'Urbanisme (Les) (1991), 9(Hiver), 56-68

Le mode de vie créé et véhiculé par le concept de "cité-jardin" s'est particulièrement bien imposé en Belgique. Explication sociologique et analyse des institutions constitutives de cette tendance.

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See detailComparaison de modèles agrométéorologiques de type statistique empririque construits à partir de différents ensembles de variables météorologiques
Palm, Rodolphe ULg; De Bast, A.; Lahlou, M.

in Bulletin des Recherches Agronomiques de Gembloux (1991), 26(1), 71-89

On compare des modèles agrométéorologiques de type statistique empirique construits à partir de différents ensembles de variables météorologiques et destinés à prévoir les rendements en maïs dans une ... [more ▼]

On compare des modèles agrométéorologiques de type statistique empirique construits à partir de différents ensembles de variables météorologiques et destinés à prévoir les rendements en maïs dans une série de départements français. La qualité des ajustements est très satisfaisante, pour autant qu'on dispose d'un nombre suffisant de variables explicatives potentielles, mais la valeur prédictive des modèles construits est nulle, puisque leur utilisation introduit une variable supplémentaire. On montre également que l'étude des résidus prédits par la méthode du "jackknife" ne permet pas d'apprécier valablement la qualité du modèle. [less ▲]

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See detailWirksamkeit eines oralen Beruhigungsmittels auf das Verhalten und die zootechnischen Leistungen von Mastbullen der Wei-Blauen Belgischen Rasse
Genicot, Bruno; Mouligneau, Frédéric; Lekeux, Pierre ULg

in Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine (1991), 38

This trial was conducted with 22 Belgian White and Blue double-muscled cattle (body weight: 241.5 +/- 6.2 kg; age: 7 months). Two similar groups were constituted: a group of bulls which were treated with ... [more ▼]

This trial was conducted with 22 Belgian White and Blue double-muscled cattle (body weight: 241.5 +/- 6.2 kg; age: 7 months). Two similar groups were constituted: a group of bulls which were treated with potassium bromide (BT; n = 11) and another one which remained untreated UT; n = 11). The treatment (736 mg potassium bromide/kg feed dry matter) was stopped 60 days before the slaughtering day. The treatment with potassium bromide induced a significantreduction in the rear engagements during the whole trial period (221 days), in direct attacks during the period A (from day 0 to day 53) and in side-on attacks during the period B from day 54 to day 167). The daily weight gains, calculated for the whole trial period, were not significantly different between the two groups. Feed utilization was lower in treated bulls. During the period C (from day 168 to day 221), the sedative potency of potassium bromide seemed to be weaker than during the periods A and B. This might be due to the habituation to potassium bromide. On the basis of these results, we can conclude that the frequency of rear engagements and, during a restricted period of fattening, the frequencies of side and directattacks are significantly reduced when potassium bromide (736 mg/kg feed dry matter) is used. The time spent for hay intake, the frequency of water intake (even if the time consumed at the drinking trough was the same) was reduced and the time during which the bulls were standing was prolonged by bromide [less ▲]

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See detailNutritive-Value Of Triticale Cultivars In Pigs As A Function Of Their Chemical-Composition
Leterme, Pascal; Tahon, François; Thewis, André ULg

in Animal Feed Science & Technology (1991), 35(1-2), 49-53

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See detailThree-dimensional electron microscopy of ribosomal chromatin in two higher plants: a cytochemical, immunocytochemical, and in situ hybridization approach.
Motte, Patrick ULg; Loppes, Roland ULg; Menager, M. et al

in Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society (1991), 39(11), 1495-506

We report the 3-D arrangement of DNA within the nucleolar subcomponents from two evolutionary distant higher plants, Zea mays and Sinapis alba. These species are particularly convenient to study the ... [more ▼]

We report the 3-D arrangement of DNA within the nucleolar subcomponents from two evolutionary distant higher plants, Zea mays and Sinapis alba. These species are particularly convenient to study the spatial organization of plant intranucleolar DNA, since their nucleoli have been previously reconstructed in 3-D from serial ultra-thin sections. We used the osmium ammine-B complex (a specific DNA stain) on thick sections of Lowicryl-embedded root fragments. Immunocytochemical techniques using anti-DNA antibodies and rDNA/rDNA in situ hybridization were also applied on ultra-thin sections. We showed on tilted images that the OA-B stains DNA throughout the whole thickness of the section. In addition, very low quantities of cytoplasmic DNA were stained by this complex, which is now the best DNA stain used in electron microscopy. Within the nucleoli the DNA was localized in the fibrillar centers, where large clumps of dense chromatin were also visible. In the two plant species intranucleolar chromatin forms a complex network with strands partially linked to chromosomal nucleolar-organizing regions identified by in situ hybridization. This study describes for the first time the spatial arrangement of the intranucleolar chromatin in nucleoli of higher plants using high-resolution techniques. [less ▲]

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See detailSkeleton resorption in echinoderms : regression of pedicellarial stalks in Sphaerechinus granularis (Echinoidea)
Bureau, Fabrice ULg; Dubois, Philippe; Ghyoot, M. et al

in Zoomorphology (1991), 110

When a globiferous pedicellaria of Sphaerechinus granularis injects its venom, the head autotomizes whereas the stalk remains on the test and enters a regression process with concomitant resorption of its ... [more ▼]

When a globiferous pedicellaria of Sphaerechinus granularis injects its venom, the head autotomizes whereas the stalk remains on the test and enters a regression process with concomitant resorption of its supporting ossicle (i.e. the rod). Scanning electron microscope investigations of the morphological changes undergone by the stereom of resorbing rods show that: (1) resorption proceeds both axially and laterally, and leads to a reduction of approximately 80% of the original length of the rod, (2) secondary growth of new stereom processes occurs concomitantly with resorption but never ensures even a partial regeneration of the rod, and (3) resorption and secondary growth stop before the rod is totally destroyed leaving a static stump that remains in place up to 190 days. Particular resorption figures result from either the axial or the lateral resorption of the rod shaft. These consist chiefly of terraced conical cupules, dense cylinders and concentric lamellae whose walls or edges are typically made of closely piled and/or aligned subprismatic crystallites. Whatever their location along the rod, these crystallites always organize strictly parallel to the rod axis. Whether the crystallites are mosaic blocks composing larger monocrystalline units or discrete monocrystals themselves is for the moment unclear. A growth model, which accounts for the observed resorption figures, is proposed for the shaft of pedicellarial rods. According to this model, the early growth of the shaft would produce elongated, interconnected trabeculae (initial trabeculae) made of densely piled and perfectly aligned crystallites. Thickening and coalescence of adjoining trabeculae would progressively occur by adjunction around the initial trabeculae of successive and concentric layers of similarly arranged crystallites. Coalescent trabeculae would then be cemented together in a perforate stereom layer by the final deposition of larger crystallite layers surrounding the whole shaft periphery. Growth of secondary stereom processes occurs both in the resorbing rod (here the newly formed processes are resorbed soon after they have been produced) and in rods where resorption has stopped. These are always irregular processes that localize near or on the actual sites of resorption. It is suggested these processes result from an uncontrolled activation of the skeleton-forming cells in areas where the concentration of calcium ions increases as a consequence of calcite resorption [less ▲]

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See detailLung fluid balance during recovery of appropriate supply-oxygen uptake ratio with volume loading in septic shock dogs
D'Orio, Vincenzo ULg; FATEMI, M; MENDES, P et al

in American Review of Respiratory Disease (1991), 143

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See detailUse Of Synthetic Peptides To Map Sequential Epitopes Recognized By Monoclonal-Antibodies On The Bovine Leukemia-Virus External Glycoprotein
Callebaut, I.; Burny, A.; Krchnak, V. et al

in Virology (1991), 185(1),

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See detailReproductive Development in Lolium temulentum L.: Spike Morphogenesis and Grain Set Limitations
Périlleux, Claire ULg; Bernier, Georges ULg; Kinet, Jean Marie

in Journal of Experimental Botany (1991), 42(4), 501

Reproductive development in cereals is not easy to investigate because their quantitative response to environmental factors makes it difficult to synchronize the plants. In this paper, one of our aims was ... [more ▼]

Reproductive development in cereals is not easy to investigate because their quantitative response to environmental factors makes it difficult to synchronize the plants. In this paper, one of our aims was to assess whether Lolium temulentum strain Ceres, a qualitative long-day grass, could serve as a model of reproductive development for cereals. The morphological patterns from floral transition to seed set were studied. [less ▲]

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See detailSerine Beta-Lactamases and Penicillin-Binding Proteins
Ghuysen, Jean-Marie ULg

in Annual Review of Microbiology (1991), 45

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See detailRelations d'implémentation et transformations autorisées d'une spécification LOTOS
Leduc, Guy ULg

in Réseaux et Informatique Répartie (1991), 1

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See detailFluorine-18-altanserin: a radioligand for the study of serotonin receptors with PET: radiolabeling and in vivo biologic behavior in rats.
Lemaire, Christian ULg; Cantineau, Robert; Guillaume, Marcel et al

in Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine (1991), 32(12), 2266-72

No-carrier-added [18F]altanserin was synthesized by nucleophilic substitution of the corresponding nitro compound with [18F]fluoride in the presence of kryptofix 222 and K2CO3. After purification by ... [more ▼]

No-carrier-added [18F]altanserin was synthesized by nucleophilic substitution of the corresponding nitro compound with [18F]fluoride in the presence of kryptofix 222 and K2CO3. After purification by preparative HPLC, [18F]altanserin was produced in less than 2 hr with a radiochemical yield of 10% (EOS) and a specific activity of 0.8-1.3 Ci/mumol. In rats, the tracer localized rapidly in the whole brain (0.5% ID/g organ) with a high binding to the frontal cortex. The frontal cortex/cerebellum ratio increased with time and reached a plateau of 11 at 2 hr postinjection. This uptake in S2 receptor regions was saturable and could be blocked by pretreatment with various S2 antagonists. This radiopharmaceutical appears to be more selective for S2 receptor sites than other ligands available today and allows the study of S2 receptors under in vivo conditions. [less ▲]

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See detailSciences de l’Antiquité et informatique
Denooz, Joseph ULg

in Nouvelles de la Science et des Technologies (1991), 9(1), 35-41

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See detailAutomatic Determination of Diltiazem and Desacetyldiltiazem in Human Plasma Using Liquid-Solid Extraction on Disposable Cartridges Coupled to Hplc--Part II: Optimization of Liquid-Solid Extraction
Hubert, Philippe ULg; Chiap, Patrice ULg; Crommen, Jacques ULg

in Journal of Pharmaceutical & Biomedical Analysis (1991), 9(10-12), 883-887

An automatic liquid-solid extraction (LSE) procedure to be coupled to HPLC for the determination of diltiazem and desacetyldiltiazem in plasma has been developed. The LSE operations are performed on ... [more ▼]

An automatic liquid-solid extraction (LSE) procedure to be coupled to HPLC for the determination of diltiazem and desacetyldiltiazem in plasma has been developed. The LSE operations are performed on disposable extraction cartridges (DECs) by means of a sample processor equipped with a robotic arm holding a needle through which the different liquids are dispensed. The operating parameters of LSE have been optimized with respect to recovery, detectability and reproducibility by using, whenever possible, aqueous solutions of the analytes. Different kinds of DECs have been tested. For the compounds studied, DECs filled with 50 mg of cyanopropyl silica have been selected. The influence of the pH of the buffer used in the washing step has been studied, leading finally to the selection of the same phosphate buffer (pH 7.4) as in the HPLC mobile phase. The minimum volume of methanol which still gives a nearly complete elution of the analytes from the extraction cartridges has been determined. Under these conditions, a high sensitivity can be obtained without an evaporation step. Moreover, the volume of buffer to be added to the methanolic eluate before injection into the HPLC system has been optimized in such a way that a focusing effect is obtained at the top of the analytical column while the dilution of the extract is minimized. [less ▲]

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See detailA new Theory for frequencies computation of overhead lines with bundle conductors.
dubois, Hervé; Dal Maso, Filipo; Lilien, Jean-Louis ULg

in Bulletin Scientifique de l'Association des Ingénieurs Electriciens sortis de l'Institut Electrotechnique Montefiore (1991), 1

Vertical, horizontal and torsional mechanical frequencies are studies for both single and bundle conductor lines. Models and tests are presented. These data are of particular impact on galloping ... [more ▼]

Vertical, horizontal and torsional mechanical frequencies are studies for both single and bundle conductor lines. Models and tests are presented. These data are of particular impact on galloping phenomenon. [less ▲]

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See detailLes applications informatiques des années 90 et leurs implications sur les réseaux de communication
Leduc, Guy ULg

in Bulletin Scientifique de l'Association des Ingénieurs Electriciens sortis de l'Institut Electrotechnique Montefiore (1991), 2

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See detailCo-operative binding of the glucocorticoid receptor DNA binding domain is one of at least two mechanisms for synergism.
Baniahmad, Claudia; Muller, Marc ULg; Altschmied, Joachim et al

in Journal of Molecular Biology (1991), 222(2), 155-65

Steroid induction of responsive genes functions through the synergistic activity of steroid receptor binding sequences with adjacent binding sites either for other transcription factors or for further ... [more ▼]

Steroid induction of responsive genes functions through the synergistic activity of steroid receptor binding sequences with adjacent binding sites either for other transcription factors or for further steroid receptors. Analysis of the human glucocorticoid receptor revealed that the DNA-binding domain of the receptor is sufficient to mediate co-operative binding to adjacent receptor binding sites. This is a novel feature of the domain in addition to its DNA-binding, trans-activating and trans-repressing properties. Chimaeric proteins containing the N- or C-terminal receptor halves fused to the GAL4 DNA-binding domain do not co-operate in DNA-binding, however they do functionally synergize. Thus, at least two mechanisms contribute to the synergism of the human glucocorticoid receptor bound to two adjacent receptor binding sites. [less ▲]

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See detailAdult-like neurobehavioral changes induced by a GABA-A agonist in infant and weanling mice
Tirelli, Ezio ULg; Jodogne, C.; Perikel, J.

in Developmental Brain Research (1991), 61(2), 207-215

Neurobehavioral responsivity to peripherally injected muscimol, a gamma-aminobutyric acid-A (GABA-A) agonist, was assessed in infant (14-day-old), weanling (20-day-old), and young adult (53-day-old ... [more ▼]

Neurobehavioral responsivity to peripherally injected muscimol, a gamma-aminobutyric acid-A (GABA-A) agonist, was assessed in infant (14-day-old), weanling (20-day-old), and young adult (53-day-old) outbred male mice. In Exp 1, relatively high doses of muscimol (0.05-0.40 mg/kg in developing and 0.50-3 mg/kg in adult Ss) were found to dose-dependently induce solid catalepsy and ataxia. In Exp 2, the GABA agonist was injected in dose ranges that included relatively small concentrations to assess its excitatory properties, observable in adults, on rearing and locomotion in developing mice. Levels of rearing and especially locomotion were enhanced at low doses (0.025-0.050 mg/kg in developing and 1.3-2.9 mg/kg in adult mice) and inhibited at higher ones (0.150 mg/kg in developing and 1.9 and 2.5 mg/kg in adult mice). ((c) 1997 APA/PsycINFO, all rights reserved) [less ▲]

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See detailMesure de la dénitrification biologique potentielle dans les sols à l'aide de l'acétylène.
Trodoux, E.; Tychon, Bernard ULg; Vander Borght, Paul ULg

in Revue de l’Agriculture = Landbouwtijdschrift (1991), 44(4), 637-648

De nombreuses méthodes ont été établies pour quantifier et définir la cinétique de dénitrification mais elles se sont toutes confrontées à la difficulté de doser l'azote de l'air (N2) qui est l'élément ... [more ▼]

De nombreuses méthodes ont été établies pour quantifier et définir la cinétique de dénitrification mais elles se sont toutes confrontées à la difficulté de doser l'azote de l'air (N2) qui est l'élément terminal de la chaîne de Payne (1973) : NO3 → NO2 → NO → N2O → N2. L'utilisation de l'acétylène a résolu ce problème en permettant l'inhibition de la réduction de l'oxyde nitreux (N2O) en N2, l'oxyde nitreux étant facilement dosable par chromatographie gazeuse. La technique utilisée lors de ce travail consiste à prélever un échantillon de sol dans l'horizon de surface. Après homogénéisation, il est placé dans des fioles à pénicilline hermétiques de 120 ml. Une préincubation de 50 h à 20-22° C sous anaérobiose engendre l'élimination des nitrates endogènes présents au départ dans le sol, ce qui permet par la suite d'ajouter des quantités précises de nitrates en vue d'effectuer des bilans de transformation du NO3 en N2O. Cette préincubation est suivie d'une incubation sous air, en présence d'acétylène (10 % vol/vol), à 20° C et à 100 % de saturation en eau. Sous ces conditions, la production de N-N2O et la disparition de N-NO3 sont mesurées, permettant ainsi de quantifier les bilans de transformation. En reportant les résultats obtenus pour 1 ha de sol (pour les 20 premiers cm), 12 kg d'azote sur les 20 présents au départ ont dénitrifié sur une période de 5 jours. De plus, cette disparition suit une cinétique à allure précise. Si ces estimations s'avéraient correspondre à la réalité, les mécanismes en cause seraient alors de la plus grande importance, tant pour l'agriculture en améliorant l'utilisation de l'azote, que pour l'environnement et la pollution de l'air et de l'eau. [less ▲]

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See detailA scoring system in predicting the risk of intestinal stricture in necrotizing enterocolitis
Battisti, Oreste ULg; Evrard, J.; Khamis, J. et al

in European Journal of Pediatrics (1991), 150

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See detailLa résistance aux pesticides : mécanismes et prévention
Delaunois, A.; Gustin, Pascal ULg; Ansay, M.

in Annales de Médecine Vétérinaire (1991), 135

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See detailL'approvisionnement en eau des porcs: un élément à ne pas négliger
Vandenheede, Marc ULg; Nicks, Baudouin ULg

in Annales de Médecine Vétérinaire (1991), 135(2), 123-128

Water requirements are determined according to the amounts of water stored in the tissues and lost by the animal. This review summarises estimates of water losses by faeces, urine, milk and by evaporation ... [more ▼]

Water requirements are determined according to the amounts of water stored in the tissues and lost by the animal. This review summarises estimates of water losses by faeces, urine, milk and by evaporation from the skin and respiratory tract. A description of the main pig drinkers is given with recommendations about the number, siting, fixing height and flow rate. Drinking water quality guidelines are also given. [less ▲]

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See detailLocating transcribed and non-transcribed rDNA spacer sequences within the nucleolus by in situ hybridization and immunoelectron microscopy.
Thiry, Marc ULg; Thiry-Blaise, L.

in Nucleic Acids Research (1991), 19(1), 11-5

Immunoelectron microscopy and in situ hybridization have been used to investigate the precise location of transcribed and non-transcribed rDNA spacer sequences. Whereas a 5'-external transcribed spacer ... [more ▼]

Immunoelectron microscopy and in situ hybridization have been used to investigate the precise location of transcribed and non-transcribed rDNA spacer sequences. Whereas a 5'-external transcribed spacer sequence is predominantly visualized in the fibrillar centers of nucleoli, a non-transcribed spacer sequence is preferentially detected in the interstices, in close contact with the fibrillar centers and which interrupt the surrounding dense fibrillar component. Occasionally these two spacers are also observed in clumps of dense nucleolus-associated chromatin. These observations provide insights into the organization of ribosomal repeats within the nucleolus. [less ▲]

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See detailLa simulation numérique de la dynamique des écoulements en Meuse : un outil de gestion des ressources hydrauliques
Pirotton, Michel ULg; Pochet, Thierry

in Tribune de l'Eau (La) (1991), 44(554), 33-39

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See detailAider l'apprenant à detecter ses propres erreurs : qu'en aurait dit DE FINETTI ?
Leclercq, Dieudonné ULg

in Enjeux : Revue de Formation Continuée et de Didactique du Français (1991), 22

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See detailFunctional domains of the 67-kDa laminin receptor precursor.
Castronovo, Vincenzo ULg; Taraboletti, G.; Sobel, M. E.

in Journal of Biological Chemistry (1991), 266(30), 20440-6

We report the characterization of two functional domains of the metastasis-associated 67-kDa laminin receptor (67-LR). Using synthetic peptides deduced from the cDNA sequence of the 37-kDa precursor of ... [more ▼]

We report the characterization of two functional domains of the metastasis-associated 67-kDa laminin receptor (67-LR). Using synthetic peptides deduced from the cDNA sequence of the 37-kDa precursor of the laminin receptor (37-LRP) as well as their corresponding affinity-purified polyclonal antibodies, we identified a unique laminin binding site as well as a membrane-associated domain of the receptor. In laminin dot blot and solid phase radioligand assays, a 20 amino acid synthetic peptide (IPCNNKGAHSVGLMWWMLAR, amino acid residues 161-180, designated peptide G) specifically bound to laminin with high affinity (Kd = 5 x 10(-8) M). Peptide G also specifically eluted the 67-LR from a laminin affinity column. Peptide G and laminin reacted with a 1:1 stoichiometry, suggesting that there is one recognition site on laminin for the peptide G domain. Immunofluorescence studies, performed on permeabilized and nonpermeabilized human A2058 melanoma cells using 10 different affinity-purified antibodies to distinct regions of the 37-LRP, identified an unusually short membrane-associated domain that was consistent with a computer predicted transmembrane domain (residues 86-101). Our data demonstrate for the first time that the 37-LRP has two functional domains consistent with the characteristics of the mature 67-LR. Furthermore, we propose peptide G as a potential inhibitor of tumor cell interactions with laminin. [less ▲]

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