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See detailChirurgie coronarienne et carotidienne en simultané: à propos de 73 cas
VAN DAMME, Hendrik ULg; CREEMERS, Etienne ULg; Defraigne, Jean-Olivier ULg et al

in Acta Chirurgica Belgica (1990), 90(4), 185-96

A series of 73 simultaneous carotid and coronary revascularizations (Group I) is presented (January 1980-December 1988). Age, sex, risk factors, severity of angina, coronarography, neurological symptoms ... [more ▼]

A series of 73 simultaneous carotid and coronary revascularizations (Group I) is presented (January 1980-December 1988). Age, sex, risk factors, severity of angina, coronarography, neurological symptoms, angiographic carotid lesions and operative outcome of these 73 patients are compared with the aspects of 3544 coronary bypass patients (Group II) and 1001 carotid endarterectomized patients (Group III) during the same period. The angina in Group I is more severe, with 22% belonging to NYHA class IV and 26% having a stenosis of the left main coronary artery, vs 14% and 13% in Group II. Seventy percent of the carotid lesions in Group I are asymptomatic vs 33% in Group III. Group I patients had more problems in the perioperative period, with 16.4% needing prolonged high-doses analeptics and 5.4% intraaortic counterpulsation balloon. Operative mortality is higher (7%) in Group I compared with Group II (2.3%) and Group III (1.7%). These results permit to define a population of polyvascular patients with concomitant coronary and carotid disease, characterized by a more diffuse atherosclerosis and a higher operative risk. Operative morbidity and mortality after combined myocardial and cerebral revascularization remains nevertheless inferior to the cumulated surgical risk of the sequential procedures (74 patients with coexistant coronary and carotid lesions operated in two sessions before 1986). [less ▲]

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See detailUse of PIXE to measure serum copper, zinc, selenium, and bromine in patients with hematologic malignancies
Beguin, Yves ULg; Bours, Vincent ULg; Delbrouck, J.-M. et al

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (1990), B49

The use of PIXE allowed for a simultaneous determination of serum copper (Cu), zinc (Zn), selenium (Se) and bromine (Br), in various groups of patients with hematologic malignancies. In 78 patients with ... [more ▼]

The use of PIXE allowed for a simultaneous determination of serum copper (Cu), zinc (Zn), selenium (Se) and bromine (Br), in various groups of patients with hematologic malignancies. In 78 patients with acute nonlymphocytic leukemia, it was observed that (1) serum Se was significantly lower than in healthy controls and correlated inversely with the tumor burden; (2) serum bromine was normal at diagnosis but dropped dramatically after intensive chemotherapy, before recovering progressively over a period of months; and (3) pretreatment serum copper and zinc were significant prognotic factors of the chance to achieve a complete remission. In 50 patients with chronic lymphocytic leukemia, it was observed that (1) serum Cu and Cu/Zn ratio were useful indices of the disease activity, which were independent of a nonspecific acute phase reaction; and (2) Zn deficiency could contribute to immune dysfunction. In 119 patients with myeloproliferative disorders or myelodysplasic syndromes, serum Cu and Zn levels were mostly dependent on nonspecific factors, such as age and inflammation. [less ▲]

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See detailRHEOLOGICAL PROPERTIES OF DILUTE POLYMER-SOLUTIONS - AN EXTENDED THERMODYNAMIC APPROACH
Lebon, Georgy ULg; Dauby, Pierre ULg; PALUMBO, A. et al

in Rheologica Acta (1990), 29(2), 127-136

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See detailSensibilite des grains de plusieurs varietes de ble, Triticum aestivum L., vis-a-vis du charancon du ble, Sitophilus granarius (L.) (Col., Curculionidae).
Rodriguez-Cobos, C.; Haubruge, Eric ULg; Gaspar, Charles ULg

in Mededelingen van de Faculteit Landbouwwetenschappen (Rijksuniversiteit te Gent) (1990), 55(2a),

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See detailApparent And True Ileal Digestibility Of Amino-Acids And Nitrogen-Balance Measured In Pigs With Ileorectal Anastomosis Or T-Cannulas, Given A Diet Containing Peas
Leterme, Pascal; Thewis, André ULg; Beckers, Yves ULg et al

in Journal of the Science of Food and Agriculture (1990), 52(4), 485-497

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See detailIntroduction au logiciel statistique Minitab
Claustriaux, Jean-Jacques ULg

in Notes de Statistique et d'Informatique (1990), (2), 12

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See detailHysteroscopic sterilization with the Nd:YAG laser.
Donnez, Jacques; Malvaux, Vincent; NISOLLE, Michelle ULg et al

in Journal of Gynecologic Surgery (1990), 6(3), 149-53

In 10 rabbits, ablation of the uterine horn endometrium and the fallopian tube was performed with the Nd:YAG laser at a power of 60 W using the touch technique. Eight weeks postsurgery, biopsies of the ... [more ▼]

In 10 rabbits, ablation of the uterine horn endometrium and the fallopian tube was performed with the Nd:YAG laser at a power of 60 W using the touch technique. Eight weeks postsurgery, biopsies of the tissue site were obtained showing that the endometrium and tubal mucosa were completely destroyed. Thirty women were sterilized using a similar technique hysteroscopically. Tubal occlusion was demonstrated by hysterosalpingography in all cases at 3 months postoperatively. [less ▲]

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See detailReactivation of HIV-1 after an oxidative stress
Piette, Jacques ULg; Legrand-Poels, Sylvie; Vaira, Dolorès ULg et al

in Free Radicals in Biology and Medicine (1990), 9(Suppl. A), 5

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See detailDeux reliquaires historiques (XIe & XIIe siècles) conservés à Liège
George, Philippe ULg

in Bulletin de la Société Nationale des Antiquaires de France (1990)

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See detailRegulation of growth hormone secretion in human trophoblastic cells in culture
Evain-Brion, Danielle; Alsat, Eliane; Mirlesse, Valérie et al

in Hormone Research (1990), 33(6), 256-259

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See detailValvular and Coronary Surgery in Renal Transplant Patients
Defraigne, Jean-Olivier ULg; Meurisse, Michel ULg; Limet, Raymond ULg

in Journal of Cardiovascular Surgery (The) (1990), 31(5), 581-3

The Authors report aortic valvular replacement (AVR) and coronary artery bypass graft surgery (CABG) successfully performed in two renal transplant patients. The postoperative blood urea and creatinine ... [more ▼]

The Authors report aortic valvular replacement (AVR) and coronary artery bypass graft surgery (CABG) successfully performed in two renal transplant patients. The postoperative blood urea and creatinine levels were comparable to the preoperative values. The first patient underwent isolated AVR. The second patient had an initial AVR combined with CABG followed two years later by a further AVR for prosthetic dysfunction. For many reasons, coronary artery (CAD) and valvular diseases are not uncommon in renal transplant patients. Cardiac surgery is feasible without impairment of the renal function provided some precautions are taken, ie good mean perfusion pressure during cardiopulmonary bypass (CPB), adequate volume replacement, and selected use of mannitol and dopamine. [less ▲]

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See detailThe effect of salmon calcitonin on blood-ionized calcium in the presence of anti-salmon calcitonin antibodies (from pagetic patients) in young rabbits
Reginster, Jean-Yves ULg; Azria, M; Gaspar, S et al

in Current Therapeutic Research (1990), 47(6), 1063-1072

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See detailLa rigidite parkinsonienne: aspects cliniques et physiopathologiques.
Delwaide, Paul ULg; PEPIN, Jean-Louis ULg; MAERTENS DE NOORDHOUT, Alain ULg

in Revue Neurologique (1990), 146(10), 548-54

Neurophysiologic mechanisms responsible for parkinsonian rigidity are poorly understood. In any case, they have to fit all the clinical data which are first reviewed before discussing 2 theories which are ... [more ▼]

Neurophysiologic mechanisms responsible for parkinsonian rigidity are poorly understood. In any case, they have to fit all the clinical data which are first reviewed before discussing 2 theories which are proposed to interpret rigidity. The first theory postulates that increased resistance to mobilization is due to hyperactivity in a long loop reflex pathway which originates at the neuromuscular spindles and relays in the motor cortex. This theory is based on the largely accepted finding that, in parkinsonian patients, M2 response is increased when a voluntary movement is abruptly stopped. Although popular this hypothesis is far from explaining all the clinical facts, namely that rigidity is equal in extensor and flexor, proximal and distal muscles. Based on a reflex set by primary afferent discharges, it is incompatible with the lack of rigidity reinforcement after faster passive mobilization. The second theory rests on data obtained from electrophysiological studies of some spinal interneurones. Both IA and IB inhibitory interneurones are functionally modified but not in the same direction. While the IA inhibitory interneurone is facilitated, the IB inhibitory interneurone is less active. Disappearance of autogenic inhibition can explain rigidity at rest and the tonic stretch reflex. In addition, interneurones intervening in the flexor reflex disclose a modified excitability. It is possible to interpret these facts by postulating an abnormal influence transmitted through descending reticulospinal pathways. This abnormal influence would result from modified activation of reticular nuclei by afferents projecting from the basal ganglia. Such a hypothesis is open to experimental testing through the startle reaction. The latter facilitates the H reflex by the reticulospinal pathways, the influence of cortex--if any--being negligible.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

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See detailNumerical Modelisation of Contact with Friction Phenomena by the Finite Element Method
Charlier, Robert ULg; Habraken, Anne ULg

in Computers & Geotechnics (1990), 9(n°1&2), 59-72

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See detailPrésentation de Marcel Thiry, prosateur
Durand, Pascal ULg

in Textyles : Revue des Lettres Belges de Langue Française (1990), 7

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See detailCarotid-Subclavian Bypass with or without Carotid Endarterectomy
Defraigne, Jean-Olivier ULg; Remy, D.; CREEMERS, Etienne ULg et al

in Acta Chirurgica Belgica (1990), 90(5), 248-54

From 1981 to 1987, 29 patients (14 women and 15 men, with a mean age of 56 +/- 15 years) underwent a carotid-subclavian bypass for occlusive lesion of the subclavian artery (or of the left common carotid ... [more ▼]

From 1981 to 1987, 29 patients (14 women and 15 men, with a mean age of 56 +/- 15 years) underwent a carotid-subclavian bypass for occlusive lesion of the subclavian artery (or of the left common carotid artery). The symptomatology included vertebrobasilar insufficiency, arm ischemic symptoms, or combination of both symptoms. Twelve patients (42%) have had a previous transient ischemic attack, or a cerebrovascular accident. There were 22 stenoses or occlusions of the left subclavian artery, and 6 of the right subclavian artery. On arteriography, 9 patients had significant associated lesions on the internal carotid artery, either homolateral (n = 7), or heterolateral, or bilateral. Carotid to subclavian bypasses were performed either with autogenous saphenous vein (n = 15), or with prosthetic graft (n = 14). In 5 cases, a carotid endarterectomy was done simultaneously to the bypass. Operative mortality was 3.4% (1/29). Early patency (less than 1 month) was 97% and late patency 89%, with a mean follow-up of 40 +/- 24 months. The patency rates were not significantly different whether a prosthesis or a vein was used for the bypass. All patients were improved and complete relief of symptoms was achieved in 92%. No patient experienced symptoms of carotid steal after the bypass. We concluded that carotid-subclavian bypass is a safe and efficient method for revascularization of the subclavian artery of of the left common carotid artery in selected cases. [less ▲]

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See detailHistogenèse du cortex cérébral et migration neuronale
Misson, Jean-Paul ULg; Takahashi, Takao; Austin, Chris et al

in Acta Paediatrica Belgica (1990), 22

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See detailDistribution of cyanide content in the lima bean in relation with the intraspecific classification and the seed coat pigmentation.
Baudoin, Jean-Pierre ULg; Barthelemy, Jean-Paul ULg; Ndungo, V. et al

in Annual report of the Bean Improvement Cooperative (1990), 33

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See detailEvaluation of grain shear stresses required to initiate movement of particles in natural rivers
Petit, François ULg

in Earth Surface Processes & Landforms (1990)

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See detailHistologic study of peritoneal endometriosis in infertile women.
NISOLLE, Michelle ULg; Paindaveine, Bénédicte; Bourdon, Anne et al

in Fertility and Sterility (1990), 53(6), 984-8

The present study included 118 patients undergoing a laparoscopy for infertility. In 86 patients with laparoscopically diagnosed endometriosis (group I), biopsies were taken from areas of apparent ... [more ▼]

The present study included 118 patients undergoing a laparoscopy for infertility. In 86 patients with laparoscopically diagnosed endometriosis (group I), biopsies were taken from areas of apparent endometriosis (n = 86) and from a visually normal peritoneum (n = 52). Histology reveals the presence of endometriosis in 93% of positive sites and in 13% of negative sites. In 32 patients without endometriosis at laparoscopy (group II), biopsies were taken from normal uterosacral ligaments (n = 32). Endometriosis was observed in 6% of cases. Despite the increased ability to detect pigmented and nonpigmented endometriotic lesion, histological study revealed the presence of endometriosis in normal peritoneum in 13% (group I) and 6% (group II) of cases. [less ▲]

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See detailIdentités sociales et comportement électoral
Jacquemain, Marc ULg; Vandekeere, Michel; Doutrelepont, René

in Res Publica (1990), 22

The article shows how different intensities of feelings of belonging to Belgium or Wallonia may lead to different electoral choices. Some parties have a more "belgican" constituency and some a more ... [more ▼]

The article shows how different intensities of feelings of belonging to Belgium or Wallonia may lead to different electoral choices. Some parties have a more "belgican" constituency and some a more "wallloon" one. [less ▲]

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See detailTransfert des nitrates dans un bassin hydrographique à vocation agricole du Sud-Luxembourg
Tychon, Bernard ULg; Guiot, S.; Debbaut, Vincent ULg et al

in Tribune de l'Eau (La) (1990), 43(543), 37-39

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See detailDevelopment of monoclonal antibodies recognizing 7-(2-hydroxyethyl)guanine and imidazole ring-opened 7-(2-hydroxyethyl)guanine.
Young, T. L.; Habraken, Yvette ULg; Ludlum, D. et al

in Carcinogenesis (1990), 11

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See detailCapacite moussante des isolats proteiques: influence du potentiel electrocinetique des dispersions proteiques.
Bastiaens, A.; Paquot, Michel ULg; Marbaise, M. et al

in Sciences des Aliments (1990), 10(4),

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See detailPosttraumatic Parathyroid Crisis and Severe Hypercalcemia Treated with Intravenous Bisphosphonate (Apd). Case Report
Canivet, Jean-Luc ULg; Damas, Pierre ULg; Lamy, Maurice ULg

in Acta Anaesthesiologica Belgica (1990), 41(1), 47-50

te hypercalcemia (4.03 mmol/l) developed in a 50 years old woman after head and intraabdominal trauma (and splenectomy). After failure to correct the calcium levels by intravenous saline, furosemide ... [more ▼]

te hypercalcemia (4.03 mmol/l) developed in a 50 years old woman after head and intraabdominal trauma (and splenectomy). After failure to correct the calcium levels by intravenous saline, furosemide, steroids and calcitonin, two hemodialyses were performed; definitive control of hypercalcemia was obtained by intravenous (3-amino-1-hydroxypropylidene)-1.1-bisphosphonic acid (APD). APD is a new drug analog of pyrophosphate; its main property is to block bone resorption, irrespective of its stimulus. As suspected by clinical and laboratory data and confirmed by arteriographic findings, surgery and pathologic examination, the underlying pathology was a mild primary hyperparathyroidism which was acutely worsened (parathyroid crisis) in the course of the trauma. Definitive treatment consisted of the removal of the adenoma responsible of the hyperparathyroidism. [less ▲]

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See detailPourquoi, quand et comment traiter une hyperlipoprotéinémie chez le patient diabétique ?
PAQUOT, Nicolas ULg; Scheen, André ULg; Lefebvre, P.

in Médecine et Hygiène (1990), 48

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See detailEndometriosis-associated infertility: evaluation of preoperative use of danazol, gestrinone, and buserelin.
Donnez, J.; NISOLLE, Michelle ULg; Casanas-Roux, F.

in International Journal of Fertility (1990), 35(5), 297-301

In order to assess adequately the effectiveness of danazol, Gestrinone, and Buserelin, a prospective nonrandomized study was initiated in 126 patients with laparoscopically confirmed ovarian endometriosis ... [more ▼]

In order to assess adequately the effectiveness of danazol, Gestrinone, and Buserelin, a prospective nonrandomized study was initiated in 126 patients with laparoscopically confirmed ovarian endometriosis. After hormonal therapy, laparotomy with microsurgical resection of endometriotic cysts was carried out. Regression (greater than 25%) of ovarian endometriosis was noted in 30%, 34%, and 73% of cases after danazol, Gestrinone, and Buserelin, respectively. The pregnancy rate in moderate endometriosis (53%) differed significantly from the rate obtained in severe endometriosis (45%). The highest percentages were found after Buserelin therapy. In conclusion, Buserelin emerged superior to danazol or Gestrinone treatment. Nevertheless, hormonal treatment leads to an incomplete suppression of ovarian endometriotic implants and this suggests the necessity of surgically removing invasive ovarian endometriosis. [less ▲]

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See detailLe télescope pour l'ultraviolet extrême EIT
Koeckelenberg, A.; Rochus, Pierre ULg

in Nouvelles de la Science et des Technologies (1990), 8

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See detailSytuacja ekonomiczna belgijskiego rolnictwa
Burny, Philippe ULg; Gazinski, Benon

in Nowe Rolnictwo (1990), (1-2-3), 34-37

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See detailCloning of a mitogen-inducible gene encoding a kappa B DNA-binding protein with homology to the rel oncogene and to cell-cycle motifs.
Bours, Vincent ULg; Villalobos, J.; Burd, P. R. et al

in Nature (1990), 348(6296), 76-80

We have cloned and characterized a mitogen-inducible gene isolated from human T cells that predicts a protein of 968 amino acids. The amino-terminal domain has regions homologous to the oncogene rel and ... [more ▼]

We have cloned and characterized a mitogen-inducible gene isolated from human T cells that predicts a protein of 968 amino acids. The amino-terminal domain has regions homologous to the oncogene rel and to the developmentally important gene dorsal of Drosophila. The carboxy-terminal domain contains repeat structures found in a variety of proteins that are involved in cell-cycle control of yeast and in tissue differentiation in Drosophila and Ceanorhabditis elegans, as well as in the putative human oncogene bcl-3 and in the ankyrin protein. A truncated form of the product of this gene translated in vitro is a DNA-binding protein which interacts specifically with the kappa B binding site found in many inducible genes, including the enhancer in human immunodeficiency virus. This gene is yet another in a growing list of important regulatory molecules whose expression is transcriptionally induced upon cellular activation. [less ▲]

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See detailMicroorganismes ferro-oxydants de Griottes carbonifères espagnoles
Mamet, B.; Boulvain, Frédéric ULg

in Bulletin de la Société Belge de Géologie (1990), 99(2), 229-239

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See detailCHROMOGENIC DEPSIPEPTIDE SUBSTRATES FOR BETA-LACTAMASES AND PENICILLIN-SENSITIVE DD-PEPTIDASES
Adam, M.; Damblon, Christian ULg; PLAITIN, B. et al

in Biochemical Journal (1990), 270(2), 525-529

Various ester and thioester derivatives of hippuric acid have been prepared which were substrates of both beta-lactamases and DD-peptidases. The thioesters were more rapidly hydrolysed by nearly all the ... [more ▼]

Various ester and thioester derivatives of hippuric acid have been prepared which were substrates of both beta-lactamases and DD-peptidases. The thioesters were more rapidly hydrolysed by nearly all the enzymes. Surprisingly, the enzymes acted rather efficiently on substrates which did not contain any chiral centre. [less ▲]

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See detailDiagnosis by PCR of HIV-1 infection in seronegative individuals at risk
Vaira, Dolorès ULg; François-Gérard, Ch.; Doppagne, A. et al

in AIDS Research and Human Retroviruses (1990), 6(2), 173-174

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See detailPreparation of poly(D,L)lactide microspheres and their clinical applications as a convenient embolic material
Grandfils, Christian ULg; Flandroy, Pierre; Nihant, Nicole et al

in Journal de Pharmacie de Belgique (1990), 6

Owing to their shape, accurately calibrated microspheres appear to be very suitable material for distal embolization. Moreover, the biocompatible (D,L) polylactide (PLA) microspheres possess two other ... [more ▼]

Owing to their shape, accurately calibrated microspheres appear to be very suitable material for distal embolization. Moreover, the biocompatible (D,L) polylactide (PLA) microspheres possess two other valuable advantages: easy adjustment of their biodegradation rate, and incorporation of chemotherapeutic agents during their production. The authors describe the preparation of these (D,L) PLA microspheres and their clinical applications as a preliminary step to arterial chemoembolization. [less ▲]

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See detailElaboration et utilisation de logiciels interactifs pour l'analyse d'essais et de démonstrations phytosanitaires
Gharby, A.; Sghaier, T.; Claustriaux, Jean-Jacques ULg et al

in Tropicultura (1990), 8(3), 144-146

The preparation and utilization of interactive softwares regarding the using of data from agrochemical experiments and demonstrative trials in Tunisia are shortly described. The working methods on data ... [more ▼]

The preparation and utilization of interactive softwares regarding the using of data from agrochemical experiments and demonstrative trials in Tunisia are shortly described. The working methods on data are specified, more particularly those about statistical and economical analysis as well as the weeds analysis methods. Trials of pluriannual experiments are also described. [less ▲]

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See detailEffet du cimatérol sur le métabolisme de l'azote chez des taurillons à l'engrais
Fiems, Leo; Cottyn, B. G.; Van Eenaeme, Christian ULg et al

in Reproduction Nutrition Developpement (1990), 30(2), 243-244

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See detailEffets microcirculatoires et cellulaires de l'endotoxine
D'Orio, Vincenzo ULg

in Réanimation (1990)

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See detailEvolution des concentrations plasmatiques de testostérone et d'insulin-like growth factor I en période péripubertaire chez le bovin cathétérisé au niveau hépatique.
Renaville, Robert ULg; Berkans, X.; Portetelle, Daniel ULg et al

in Annales de Recherches Vétérinaires = Annals of Veterinary Research (1990), 21

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See detailLes lombalgies: diagnostic différentiel
Reginster, Jean-Yves ULg; Lecart, MP

in Reuma (1990), 34

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See detailThe presence of a type IV collagen skeleton associated with periductal elastosis in breast cancer
Verhoeven, D.; Bourgeois, N.; Noël, Agnès ULg et al

in Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society (1990), 38

Using serial sections of frozen and AFA-fixed tissues from 34 breast cancers, we studied the presence of basement membrane material in the areas of elastosis. Various amounts of type IV collagen but not ... [more ▼]

Using serial sections of frozen and AFA-fixed tissues from 34 breast cancers, we studied the presence of basement membrane material in the areas of elastosis. Various amounts of type IV collagen but not of laminin were demonstrated in areas of periductal elastosis. In some tumors, type IV collagen accumulated beneath the basement membrane. Periductal elastosis in areas of extensive fibrosis showed focal type IV collagen immunoreactivity, indicating remnants of ducts. Interstitial elastosis corresponded with weak type IV collagen reactivity. Each tumor showed type IV collagen immunostaining of the elastotic areas, with various degrees of intensity. Negative crossreactivity of the type IV collagen antibody with elastin was verified in skin biopsies with solar elastosis. Pre-incubation of the antibody with large amounts of elastin demonstrated an identical immunoreactivity. The specificity of the antibody was confirmed by ELISA and by Western blot analysis. To explain the periductal elastosis, we propose the following hypothesis. Excessive production of basement membrane material by the epithelial cells of the ducts leads to formation of a type IV collagen skeleton. This skeleton can act as the matrix for a secondary deposition of elastic material. [less ▲]

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See detailThe development of radial glia and radial dendrites during barrel formation in mouse somatosensory cortex
Crandall, james E; Butler, darlene; Misson, Jean-Paul ULg

in Developmental Brain Research (1990), 55

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See detailEvaluation of preoperative use of danazol, gestrinone, lynestrenol, buserelin spray and buserelin implant, in the treatment of endometriosis associated infertility.
Donnez, Jacques; NISOLLE, Michelle ULg; Clerckx, Françoise et al

in Progress in Clinical & Biological Research (1990), 323

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See detailPrévention de l'athérosclérose chez le sujet diabétique
PAQUOT, Nicolas ULg; SCHEEN, André ULg

in Medical trends (1990), 1

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See detailAnalyse du feedback émis par des entraîneurs en gymnastique rythmique sportive
Colomberotto, Ariane; Cloes, Marc ULg; Hanus, Yasmine et al

in Sport (1990), 132

la Gymnastique Rytmique Sportive (GRS) constitue une discipline artistique, riche par son contenu gymnique. Elle répond parfaitement aux objectifs généraux de l'entraînement des activités sportive: le ... [more ▼]

la Gymnastique Rytmique Sportive (GRS) constitue une discipline artistique, riche par son contenu gymnique. Elle répond parfaitement aux objectifs généraux de l'entraînement des activités sportive: le mouvement, la perception de l'espace et la coordination motrice. Notre recherche concerne la relation pédagogique en GRS. Elle découle d'un souci permanent d'assurer le progrès dans la maîtrise gestuelle des participants tout en maintenant un climat affectif favorable dans le groupe. ... [less ▲]

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See detailAndrogen-dependent vasopressinergic neurons are involved in social recognition in rats.
Bluthe, R. M.; Schoenen, Jean ULg; Dantzer, R.

in Brain Research (1990), 519(1-2), 150-7

Socal recognition of juvenile conspecifics by adult male rats has been shown to be modulated by vasopressin. Because part of the extrahypothalamic vasopressinergic innervation of the brain is androgen ... [more ▼]

Socal recognition of juvenile conspecifics by adult male rats has been shown to be modulated by vasopressin. Because part of the extrahypothalamic vasopressinergic innervation of the brain is androgen-dependent, the present experiments were undertaken to assess possible interactions between androgens and vasopressin in social recognition. Castrated male rats displayed a temporary disruption of social recognition when they were tested 1 week after surgery. There was no impairment, however, when they were tested every other day following surgery. The peripheral injection of a vasopressor antagonist of vasopressin, dPTyr(Me)AVP (30 micrograms/kg) impaired social recognition in normal male rats but was ineffective in castrated ones. This was not due to an effect of castration on the basic pharmacological properties of dPTyr(Me)AVP since the antagonist peptide was still able to block the facilitating effects of vasopressin on social recognition in castrated male rats. Implantation of a testosterone-filled capsule in castrated male rats restored sensitivity of social recognition to the action of the vasopressin antagonist. These results suggest that androgen-dependent vasopressinergic neurons are physiologically involved in the modulation of social recognition in male rats. [less ▲]

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See detailLOCALLY BOUNDED NONCONTINUOUS LINEAR-FORMS ON STRONG DUALS OF NONDISTINGUISHED KOTHE ECHELON SPACES
Bastin, Françoise ULg; Bonet, Jose

in Proceedings of the American Mathematical Society (1990), 108(3), 769-774

In this note it is proved that if Al (A) is any nondistinguished Kothe echelon space of order one and K. ,0 (AI (A))' is its strong dual, then there is even a linear form : K - C which is locally bounded ... [more ▼]

In this note it is proved that if Al (A) is any nondistinguished Kothe echelon space of order one and K. ,0 (AI (A))' is its strong dual, then there is even a linear form : K - C which is locally bounded (i.e. bounded on the bounded sets) but not continuous. It is also shown that every nondistinguished Kothe echelon space contains a sectional subspace with a particular structure [less ▲]

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See detailA Decennial Control Of N-Cycle In The Belgian Ardenne Forest Ecosystems
Weissen, F.; Hambuckers, Alain ULg; Vanpraag, Hj. et al

in Plant and Soil (1990), 128(1),

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See detailComparaison des taxocénoses de Carabides de terrils et de milieux semi-naturels.
Dufrêne, Marc ULg; Anrys, Pierre; Barbier, Yvan et al

in Notes fauniques de Gembloux (1990), 21

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See detailComportement hydrologique de deux bassins versants se différenciant par leur couvert végétal et leur épaisseur de tourbe
Mbuyu, N.; Petit, François ULg

in Bulletin de la Société Belge d'Etudes Géographiques = Tijdschrift van de Belgische Vereniging voor Aardrijkskundige Studies (1990)

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See detailNeodymium: YAG laser hysteroscopy in large submucous fibroids.
Donnez, Jacques; Gillerot, Stéphane; Bourgonjon, Damien et al

in Fertility and Sterility (1990), 54(6), 999-1003

The preoperative use of a potent, subcutaneously injected gonadotropin-releasing hormone agonist (GnRH-a) was evaluated in a series of 60 women with large submucosal fibroids. Myomectomy by hysteroscopy ... [more ▼]

The preoperative use of a potent, subcutaneously injected gonadotropin-releasing hormone agonist (GnRH-a) was evaluated in a series of 60 women with large submucosal fibroids. Myomectomy by hysteroscopy and Nd:YAG laser was easily performed. In 12 cases, the largest portion of the myoma was not inside the uterine cavity and myomectomy was carried by a two-step hysteroscopy. In women who wished to become pregnant, a pregnancy rate of 66% was achieved. Advantages of preoperative use of a GnRH-a are (1) the significant decrease of the fibroid size, (2) a lower fluid absorption, and (3) the restoration of a normal hemoglobin concentration. [less ▲]

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See detailCombined diagnostic value of biochemical markers in acute pancreatitis.
Viel, J F; Foucault, P; Bureau, F et al

in Clinica Chimica Acta (1990), 189(2), 191-8

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See detailLa magie des Petites légendes de Maurice Carême
Defays, Jean-Marc ULg

in Bulletin francophone de Finlande (1990), (6), 29-34

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See detailTriiodothyronine inhibits transcription from the human growth hormone promoter
Morin, A.; Louette, J.; Voz, Marianne ULg et al

in Molecular & Cellular Endocrinology (1990), 71(3), 261-7

Three DNA constructs, the natural human growth hormone gene (hGH-hGH) its 500 bp promoter linked to the chloramphenicol acetyl transferase reporter gene (hGH-CAT), and its structural part linked to the ... [more ▼]

Three DNA constructs, the natural human growth hormone gene (hGH-hGH) its 500 bp promoter linked to the chloramphenicol acetyl transferase reporter gene (hGH-CAT), and its structural part linked to the herpes virus thymidine kinase promoter (TK-hGH) were introduced into rat pituitary GC cells by DEAE-dextran transfection. Transient expression was followed as a function of triiodothyronine (T3) concentration. The hGH-CAT expression was specifically inhibited by T3 following a typical dose-response curve while hGH-GH gene expression was not significantly modified. The transient expression of TK-hGH increased as a function of T3 concentration. These results indicate that T3 exerts two opposite effects on hGH gene expression. First, it down-regulates expression by acting on the promoter; second, it up-regulates expression by acting on the structural part of the gene. These action could be due to regulation of transcription and mRNA stabilization, respectively. [less ▲]

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See detailGivetian-Frasnian phytogeography of Euramerica and Western Gondwana based on Miospore distribution.
Streel, Maurice ULg; Fairon-Demaret, M; Loboziak, S

in Special Publication - Geological Society of London (1990), 12

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See detailEnergy levels and oscillator strengths for gallium-like ions (Br V- In XIX)
Biémont, E; Quinet, Pascal ULg

in Journal of Quantitative Spectroscopy & Radiative Transfer (1990), 44

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See detailEffect of Show Jumping on Heart Rate, Blood Lactate and Other Plasma Biochemical Values
Art, Tatiana ULg; Amory, Hélène ULg; Desmecht, Daniel ULg et al

in Equine Veterinary Journal. Supplement (1990), 32(9), 78-82

This study investigated some physiological responses to exercise performed by a horse during show jumping. The effects of jumping on heart rate (HR), blood lactate (LA) and some other blood values were ... [more ▼]

This study investigated some physiological responses to exercise performed by a horse during show jumping. The effects of jumping on heart rate (HR), blood lactate (LA) and some other blood values were studied in nine normal horses participating at the Belgian Junior Championship. Venous blood was sampled before and immediately after the show jumping and was analysed for packed cell volume, LA, blood glucose (GLU), total plasma protein, bicarbonate, sodium, potassium (K+), chloride, calcium and activities of plasma lactate dehydrogenase, creatine phosphokinase (CK) aspartate amino transferase and gamma glutamyl transferase (GGT). A heart rate recorder placed under the saddle allowed the continuous recording of HR from the warm-up until 2 mins after the event. The completion of the jumping induced significant changes in all values, except in K, GLU and GGT. Resting values of LA and HR were 0.53 +/- 0.05 mmol/litre and 43.9 +/- 1.9 beats/min respectively. Post exercise LA reached a mean value of 9.04 +/- 0.9 mmol/litre, and, during the jumping, HR rose to a peak of 191.4 +/- 3.8 beats/min. The results of this study demonstrate that, although the speed and duration of such an exercise are low, show jumping represents a severe exertion which requires the use of anaerobic metabolism. This implies that the training schedule of jumpers must include power training in order to improve their anaerobic capacity. [less ▲]

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See detailEffects of design and kinematic parameters of rotary cultivators on soil structure
Destain, Marie-France ULg; Houmy, K.

in Soil & Tillage Research (1990), 17(3-4), 291-301

In comparison with drawn implements, rotary cultivators are of particular interest in final seedbed preparation. In this paper, a quantitative basis for the description of soil structure created by rotary ... [more ▼]

In comparison with drawn implements, rotary cultivators are of particular interest in final seedbed preparation. In this paper, a quantitative basis for the description of soil structure created by rotary tillers is given. Undisturbed Ap horizon samples were collected, impregnated with polyester resin, sectioned by sawing and analysed by means of image analysis. Total porosity, area and size of pores are related to the design and kinematic parameters of the rotary cultivator, arising from an analysis based upon the location of instant centres of velocity. It is shown that using a rotary cultivator with a higher ratio of peripheral to forward velocity leads to a smaller total mean porosity which is more homogeneous. [less ▲]

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See detailTiming behavior and development : comments on some animal and human data
Lejeune, Helga ULg; Richelle, Marc ULg

in International Journal of Comparative Psychology (1990), 4

This paper discusses timing behavior as measured by Fixed Interval (FI), Differential Reinforcement of Low rate (DLR) or Differential Reinforcement of Response Duration (DRRD) performances, in humans and ... [more ▼]

This paper discusses timing behavior as measured by Fixed Interval (FI), Differential Reinforcement of Low rate (DLR) or Differential Reinforcement of Response Duration (DRRD) performances, in humans and animals at different developmental stages. Infants and rats display similar behavior patterns in FI and DRL. From childhood on, humans develop species-specific behavior patterns in FI, which differ from those of animal species. However, DRL patterns do follow similar developmental trends in animals and humans. These discrepancies and similarities may be explained by the availability of cognitive and luinguistic tools in humans, and the degree of schedule constraint on behavior. Motivation and reinforcer variables as well as indices favorable to a cross-specific timing mechanism (such as scalar timing)are briefly comented upon. Available data tend to show that human shift from contingency-shaped or "animal-like" behavior, in infancy, to rule-governed behavior. This transition is progressive and does not seem to erase forms of adaptation to temporal contraints that humans share with other species. [less ▲]

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See detail"Boundaries and Beyond": Memory as Quest in Janet Frame's The Carpathians
Delrez, Marc ULg

in Commonwealth : Essays and Studies (1990), 13(1), 95-105

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See detailSpatiotemporal segregation of endothelial cell integrin and nonintegrin extracellular matrix-binding proteins during adhesion events.
Basson, C. T.; Knowles, W. J.; Bell, L. et al

in Journal of Cell Biology (1990), 110(3), 789-801

Bovine aortic endothelial cell (BAEC) attachments to laminin, fibronectin, and fibrinogen are inhibited by soluble arginine-glycine-aspartate (RGD)-containing peptides, and YGRGDSP activity is responsive ... [more ▼]

Bovine aortic endothelial cell (BAEC) attachments to laminin, fibronectin, and fibrinogen are inhibited by soluble arginine-glycine-aspartate (RGD)-containing peptides, and YGRGDSP activity is responsive to titration of either soluble peptide or matrix protein. To assess the presence of RGD-dependent receptors, immunoprecipitation and immunoblotting studies were conducted and demonstrated integrin beta 1, beta 3, and associated alpha subunits as well as a beta 1 precursor. Immunofluorescence of BAECs plated on laminin, fibronectin, and fibrinogen reveals different matrix-binding specificities of each of these integrin subclasses. By 1 h after plating, organization of beta 1 integrin into fibrillar streaks is influenced by laminin and fibronectin, whereas beta 3 integrin punctate organization is influenced by fibrinogen and the integrin spatial distribution changes with time in culture. In contrast, the nonintegrin laminin-binding protein LB69 only organizes after cell-substrate contact is well established several hours after plating. Migration of BAECs is also mediated by both integrin and nonintegrin matrix-binding proteins. Specifically, BAEC migration on laminin is remarkably sensitive to RGD peptide inhibition, and, in its presence, beta 1 integrin organization dissipates and reorganizes into perinuclear vesicles. However, RGD peptides do not alter LB69 linear organization during migration. Similarly, agents that block LB69--e.g., antibodies to LB69 as well as YIGSR-NH2 peptide--do not inhibit attachment of nonmotile BAECs to laminin. However, both anti-LB69 and YIGSR-NH2 inhibit late adhesive events such as spreading. Accordingly, we propose that integrin and nonintegrin extracellular matrix-binding protein organizations in BAECs are both temporally and spatially segregated during attachment processes. High affinity nonintegrin interaction with matrix may create necessary stable contacts for longterm attachment, while lower affinity integrins may be important for initial cell adhesion as well as for transient contacts of motile BAECs. [less ▲]

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See detailRenal effects of cadmium body burden of the general population
Buchet, J. P.; Lauwerys, R.; Roels, H. et al

in Lancet (1990), 336

In a cross-sectional population study to assess whether environmental exposure to cadmium associated with renal dysfunction, 1699 subjects aged 20-80 years were studied as a random sample of four areas of ... [more ▼]

In a cross-sectional population study to assess whether environmental exposure to cadmium associated with renal dysfunction, 1699 subjects aged 20-80 years were studied as a random sample of four areas of Belgium with varying degrees of cadmium pollution. After standardisation fo several possible confounding factors, five variables (urinary excretion of retinol-binding protein, N-acetyl-ß-glucosaminidase, ß2-microglobulin, aminoacids, and calcium) were significantly associated with the urinary excretion of cadmium (as a marker of cadmium body burden) suggesting the presence of tubular dysfunction. There was a 10% probablility of values of these variables being abnormal when cadmium excretion exceeded 2-4 µg/24h. Excretion reached also evidence that diabetic patients may be more susceptible to the toxic effect of cadmium on the renal proximal tubule. [less ▲]

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See detailRegulatory elements controlling pituitary-specific expression of the human prolactin gene
Peers, Bernard ULg; Voz, Marianne ULg; Monget, Philippe et al

in Molecular & Cellular Biology (1990), 10(9), 4690-700

We have performed transfection and DNase I footprinting experiments to investigate pituitary-specific expression of the human prolactin (hPRL) gene. When fused to the chloramphenicol acetyltransferase ... [more ▼]

We have performed transfection and DNase I footprinting experiments to investigate pituitary-specific expression of the human prolactin (hPRL) gene. When fused to the chloramphenicol acetyltransferase (CAT) reporter gene, 5,000 base pairs of the 5'-flanking sequences of the hPRL gene were able to drive high cat gene expression in prolactin-expressing GH3B6 cells specifically. Deletion analysis indicated that this pituitary-specific expression was controlled by three main positive regulatory regions. The first was located just upstream from the TATA box between coordinates -40 and -250 (proximal region). We have previously shown that three motifs of this region bind the pituitary-specific Pit-1 factor. The second positive region was located in the vicinity of coordinates -1300 to -1750 (distal region). DNase I footprinting assays revealed that eight DNA motifs of this distal region bound protein Pit-1 and that two other motifs were recognized by ubiquitous factors, one of which seems to belong to the AP-1 (jun) family. The third positive region was located further upstream, between -3500 and -5000 (superdistal region). This region appears to enhance transcription only in the presence of the distal region. [less ▲]

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See detailPerinatal growth hormone (GH) physiology : effect of GH-releasing factor on maternal and fetal secretion of pituitary and placental GH.
De Zegher, F.; Vanderschueren-Lodeweyckx, M.; Spitz, B. et al

in Journal of Clinical Endocrinology and Metabolism (1990), 71(2), 520-522

To study regulation of the secretion of human pituitary GH (hGH) and placental GH (hPGH) in the pregnant woman and human fetus, the GH-releasing factor Sermorelin [GRF-(l–29)-NH2] was administered to ... [more ▼]

To study regulation of the secretion of human pituitary GH (hGH) and placental GH (hPGH) in the pregnant woman and human fetus, the GH-releasing factor Sermorelin [GRF-(l–29)-NH2] was administered to pregnant women at term (n = 5), just before elective cesarean section; saline was administered in control studies (n = 5). The effects of GRF-(1–29)-NH2 administration on maternal and fetal serum concentrations of hGH and GRF-(l–29)-NH2 and maternal serum levels of hPGH were evaluated at birth. The mean time span between injection and birth was 20 min (range, 15–25 min). Cord serum hGH concentrations were similar in infants of GRF-(1–29)-NH2-injected mothers and control infants. GRF-(l–29)-NH2 elicited a consistent but small rise in maternal hGH serum concentrations (P = 0.08), whereas hPGH concentrations remained unaltered. Finally, GRF-(l–29)-NH2 concentrations were undetectable in cord serum, but readily detectable in concomitantly obtained maternal serum. In conclusion, these data suggest that hGH secretion in the pregnant woman at term is suppressed at the pituitary level, that GRF does not affect hPGH secretion, and that fetal hGH secretion is independent of circulating maternal GRF, probably because of lack of transplacental GRF passage. [less ▲]

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See detailDissections spontanées de la carotide interne. A propos de sept cas avec revue de la littérature
Van Damme, Hendrik ULg; Martin, Didier ULg; Stassen, M. P. et al

in Journal des Maladies Vasculaires (1990), 15(1), 14-22

Since 1978, the authors have observed 7 cases of dissecting aneurysm in the internal carotid artery. Symptoms were severe headache and subsequent neurologic deficit in young persons (3 women, 4 men; mean ... [more ▼]

Since 1978, the authors have observed 7 cases of dissecting aneurysm in the internal carotid artery. Symptoms were severe headache and subsequent neurologic deficit in young persons (3 women, 4 men; mean age 35 years). The underlying pathology was spontaneous dissection of the cervical internal carotid artery, with surgical confirmation in 3 cases and typical angiographic patterns in all cases. Spontaneous dissection of the cervical internal carotid artery is being increasingly recognized as a cause of cerebral ischemia in young adults. Moreover this clinicopathologic event is more common than had previously been supposed. The etiology remains unclear, except in 15% of cases in which dystrophy of the media (Marfan's syndrome) is in cause. No history of cervical trauma can be found. Typical clinical features consist in ipsilateral headache preceding an abrupt neurologic deficit in a 40-year-old person. An incomplete Horner syndrome (oculosympathetic paresis without facial anhidrosis) associated with facial pain and numbness is pathognomonic, but the majority of dissections are less typical. The typical angiographic pattern is an elongated regular stenosis of the high cervical internal carotid artery, 2 cm above the non-involved bulbus ("string sign"). The dissection may modify to a tapered occlusion above the point of origin of the internal carotid artery. The natural course is spontaneous resolution of the stricture, without relapse. Optimal management is non-operative since medical treatment has proved to be efficient. These cases confirm the benign course and overall good prognosis of spontaneous dissections of the internal carotid artery which are not as rare as the scarcity of reports might indicate.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

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See detailExpression of preprotachykinin-A and neuropeptide-Y messenger RNA in the thymus
Ericsson, Anders; Geenen, Vincent ULg; Robert, François et al

in Molecular Endocrinology (1990), 4

The preprotachykinin-A gene, the common gene of mRNAs encoding both substance-P (SP) and neurokinin- A (NKA), was shown to be expressed in Sprague-Dawley rat thymus by detection of specific mRNA in gel ... [more ▼]

The preprotachykinin-A gene, the common gene of mRNAs encoding both substance-P (SP) and neurokinin- A (NKA), was shown to be expressed in Sprague-Dawley rat thymus by detection of specific mRNA in gel-blot analyses. In situ hybridization revealed dispersed PPT-A-labeled cells in sections from rat thymus, with a concentration of grains over a subpopulation of cells in the thymic medulla. Also, neuropeptide-Y mRNA-expressing cells were found in the rat thymus, primarily in the thymic medulla. Rat thymic extracts contained SP-like immunoreactivity (SP-LI), and the major part of the immunoreactivity coeluted with authentic SP and SP sulfoxide standards. SP-LI was also detected in human thymus, which contained between 0.09-0.88 ng SP-LI/ g wet wt. Evidence for translation of preprotachykinin- A mRNA in the rat thymus was obtained from the demonstration of NKA-LI in thymic cells with an epithelial-like cell morphology. Combined with previous observations on the immunoregulatory roles of tachykinin peptides and the existence of specific receptors on immunocompetent cells, the demonstration of intrathymic synthesis of NKA suggests a role for NKA-LI peptides in T-cell differentiation in the thymus. [less ▲]

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See detailMiospores, the Lemurata and Triangulatus levels and their faunal indices near the Eifelian/Givetian boundary in the Eifel (F.R.G.)
Loboziak, S; Streel, Maurice ULg; Weddige, K

in Annales de la Société Géologique de Belgique (1990), 113(2), 299-313

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See detailBeta-lactamase of Bacillus licheniformis 749/C at 2 A resolution.
Moews, P. C.; Knox, J. R.; Dideberg, O. et al

in Proteins (1990), 7(2), 156-71

Two crystal forms (A and B) of the 29,500 Da Class A beta-lactamase (penicillinase) from Bacillus licheniformis 749/C have been examined crystallographically. The structure of B-form crystals has been ... [more ▼]

Two crystal forms (A and B) of the 29,500 Da Class A beta-lactamase (penicillinase) from Bacillus licheniformis 749/C have been examined crystallographically. The structure of B-form crystals has been solved to 2 A resolution, the starting model for which was a 3.5 A structure obtained from A-form crystals. The beta-lactamase has an alpha + beta structure with 11 helices and 5 beta-strands seen also in a penicillin target DD-peptidase of Streptomyces R61. Atomic parameters of the two molecules in the asymmetric unit were refined by simulated annealing at 2.0 A resolution. The R factor is 0.208 for the 27,330 data greater than 3 sigma (F), with water molecules excluded from the model. The catalytic Ser-70 is at the N-terminus of a helix and is within hydrogen bonding distance of conserved Lys-73. Also interacting with the Lys-73 are Asn-132 and the conserved Glu-166, which is on a potentially flexible helix-containing loop. The structure suggests the binding of beta-lactam substrates is facilitated by interactions with Lys-234, Thr-235, and Ala-237 in a conserved beta-strand peptide, which is antiparallel to the beta-lactam's acylamido linkage; an exposed cavity near Asn-170 exists for acylamido substituents. The reactive double bond of clavulanate-type inhibitors may interact with Arg-244 on the fourth beta-strand. A very similar binding site architecture is seen in the DD-peptidase. [less ▲]

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See detailA theoretical survey of resonance transitions in nickel-like ions (Ge V - La XXX)
Quinet, Pascal ULg; Biémont, E

in Bulletin de la Société Royale des Sciences de Liège (1990), 59

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See detailFormation of N2,3-ethanoguanine in DNA after in vitro treatment with the therapeutic agent, N-(2-chloroethyl)-N'-cyclohexyl-N-nitrosourea
Habraken, Yvette ULg; Carter, C.; Kirk, M. et al

in Carcinogenesis (1990), 11(2), 223-228

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See detailAn anomalous nonlinear heat-conduction problem (improvement)
Beckers, Jean-Marie ULg

in Mathematical & Computer Modelling (1990), 13(5), 89-92

A linear anomalous heat-flux problem is analysed from a stability point of view and a previous [Mathl Comput. Modelling 12(6), 671–672 (1989)] is improved. Then a non-linear problem proposed in the same ... [more ▼]

A linear anomalous heat-flux problem is analysed from a stability point of view and a previous [Mathl Comput. Modelling 12(6), 671–672 (1989)] is improved. Then a non-linear problem proposed in the same paper is partly resolved and numerically verified, which shows that only one stationary solution is stable to perturbations. [less ▲]

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See detailIDENTIFICATION OF PLACENTAL HUMAN GROWTH-HORMONE AS THE GROWTH HORMONE-V GENE-EXPRESSION PRODUCT
Frankenne, Francis ULg; Scippo, Marie-Louise ULg; Van Beeumen, Jos et al

in Journal Of Clinical Endocrinology And Metabolism (1990), 71(1), 15-18

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See detailCalcitonin and Postmenopausal Bone Loss
Reginster, Jean-Yves ULg; DEROISY, Rita ULg; Lecart, MP et al

in Experimental Gerontology (1990), 25

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See detailEtude technologique de la valorisation par lamellation de chênes indigènes de petites dimensions
Lejeune, Philippe ULg; Leclercq, André

in Bulletin des Recherches Agronomiques de Gembloux (1990), 25(3), 313-328

The authors have examined the technological feasibility of laminating small sized logs (girth at breast height between 70 and 150 cm) of European oaks (Quercus robur L. and Quercus petraea LIEBL.). This ... [more ▼]

The authors have examined the technological feasibility of laminating small sized logs (girth at breast height between 70 and 150 cm) of European oaks (Quercus robur L. and Quercus petraea LIEBL.). This technique allows indeed to produce from a low grade raw material a product able to compete with solid wood of first choice. The manufacturing of window frames has been taken as an example of the use of laminated oak. The observed output from the sawing of the experimental material seems to point out that only the logs belonging to the girth categories between 105 and 145 cm are really able to be upgraded by this process (output ranging from 19 % up to 28 %). The shrinkage measurements show that the processed raw material is characterized by a low dimensional stability. The effect of the wood species and the kind of glue on the mechanical behaviour of the product has been investigated. Oak has a lower bending strength than merbau but higher than meranti or larch from Oural. Considering the different glues used for this experiment, it has been observed that they give in "dry state" a higher shear strength than solid wood. However, moisture induces to a variable extent a strength loss for all the compared wood adhesives. [less ▲]

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See detailObservations de l’Univers lointain avec le Télescope Spatial Hubble
Surdej, Jean ULg

in Nouvelles de la Science et des Technologies (1990), 8(Nø3-4), 87-92

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See detailValidation of Structural Computation Codes in Elastoviscoplasticity
Benallal, A.; Chabrand, P.; Ghazouane, P. et al

in International Journal for Numerical Methods in Engineering (1990), 29

This paper discusses various procedures for the implementation of viscoplastic constitutive equations in Finite Element Codes. The set of constitutive equations that has been used is described. Several ... [more ▼]

This paper discusses various procedures for the implementation of viscoplastic constitutive equations in Finite Element Codes. The set of constitutive equations that has been used is described. Several kinds of implementation, using various numerical techniques, are proposed. Validations of these implementations and comparisons between them are investigated by means of a set of simple but comprehensive examples [less ▲]

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See detailSuperconductivity fluctuations in electrical and thermoelectrical properties of granular ceramic superconductors: Homogeneous versus fractal behavior
Clippe, Paulette ULg; Laurent, Christian; Patapis, S. K. et al

in Physical Review B (1990), 42(13), 8611-8614

Both the electrical-resistivity and the thermoelectric-power temperature-derivative diver- gences are examined in typical granular ceramic superconductors (YBa2Cu3O7-y and Bi1.75Pb0.25Ca2Sr2Cu3O10-z ... [more ▼]

Both the electrical-resistivity and the thermoelectric-power temperature-derivative diver- gences are examined in typical granular ceramic superconductors (YBa2Cu3O7-y and Bi1.75Pb0.25Ca2Sr2Cu3O10-z). Critical exponents are extracted in the region above the critical temperature. The dimensionality of anomalous superconductivity fluctuations is deduced. The same universal behavior is found for the excess resistivity and the excess thermoelectric power in a given system. It is shown that a homogeneous regime and a self-similar (fractal) behavior can be distinguished depending on the samples. The results are discussed in terms of superconductivity paths occurring through surface connections and of different values of the superconductivity S and percolation P coherence-length ratio. [less ▲]

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See detailReconstituted basement membrane matrix stimulates interstitial procollagenase synthesis by human fibroblasts in culture.
Emonard, H.; Christiane, Y.; Munaut, Carine ULg et al

in Matrix (Stuttgart, Germany) (1990), 10(6), 373-7

Synthesis of interstitial collagenase by human fibroblasts was compared when cultured on plastic, in the presence or absence of soluble laminin, on a type I collagen gel and on a gel of basement membrane ... [more ▼]

Synthesis of interstitial collagenase by human fibroblasts was compared when cultured on plastic, in the presence or absence of soluble laminin, on a type I collagen gel and on a gel of basement membrane components (matrigel). Fibroblasts cultured on matrigel or on type I collagen gel displayed an increase in the steady-state levels of mRNA for interstitial procollagenase that was proportional to its enzymatic activity. Laminin, the main component of matrigel, had no effect on the interstitial collagenase synthesis by fibroblasts. We suggest that matrigel, which stimulates the interstitial collagenase production at a transcriptional step, could regulate the catabolic potential of fibroblasts. [less ▲]

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See detailInfestation de chiots par Neospora Canis en Belgique et en France
Poncelet, Luc; Coignoul, Freddy ULg; Fontaine, Jacques ULg et al

in Annales de Médecine Vétérinaire (1990), (134), 167-171

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See detailInjection of Sulbutiamine Induces an Increase in Thiamine Triphosphate in Rat Tissues
Bettendorff, Lucien ULg; Weekers, Laurent ULg; Wins, Pierre et al

in Biochemical Pharmacology (1990), 40(11), 2557-2560

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See detailLaminin and fibronectin increase the steady state level of the 67 kD high affinity metastasis-associated laminin receptor mRNA in human cancer cells.
Castronovo, Vincenzo ULg; Sobel, M. E.

in Biochemical and Biophysical Research Communications (1990), 168(3), 1110-7

Among the various known laminin binding proteins, the 67 kD high affinity laminin receptor (LR) is intimately involved during tumor invasion and metastasis. In this study, we report that laminin and ... [more ▼]

Among the various known laminin binding proteins, the 67 kD high affinity laminin receptor (LR) is intimately involved during tumor invasion and metastasis. In this study, we report that laminin and fibronectin, two attachment glycoproteins, significantly increased the total cellular level of 67 kD LR mRNA in two human cancer cell lines, T47D breast carcinoma cells and A2058 melanoma cells. Neither GRGDS nor YIGSR synthetic peptides induced such a stimulatory effect. Since the steady state level of LR mRNA has been shown to control the number of receptors expressed at the cell surface, these results suggest that contact of the cancer cells with laminin and fibronectin in the host matrix may be an important regulatory mechanism by which cancer cells maintain a high number of LR at their cell surface as they progress through the several steps of tumoral invasion and metastasis. [less ▲]

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See detailWhither dynamic state estimation ?
Rousseaux, Patricia ULg; Van Cutsem, Thierry ULg; Dy Liacco, Tom

in International Journal of Electrical Power & Energy Systems (1990), 12(2), 104-116

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See detailThe relationship between carcass characteristics, plasma hormones and metabolites in young fattening bulls.
Istasse, Louis ULg; Van Eenaeme, Christian ULg; Gabriel, Annick ULg et al

in Veterinary Research Communications (1990), 14(1), 19-26

Six Belgian Blue bulls (double-muscled type) and six Friesian bulls were offered a fattening diet for 34 weeks. Plasma samples were obtained once a week and also every 20 min over a 24 h period, 7 weeks ... [more ▼]

Six Belgian Blue bulls (double-muscled type) and six Friesian bulls were offered a fattening diet for 34 weeks. Plasma samples were obtained once a week and also every 20 min over a 24 h period, 7 weeks before slaughter. No differences were observed between the breeds in plasma glucose, urea and free amino nitrogen concentrations, while creatinine was significantly higher in the Belgian Blue bulls. Tri-iodothyronin, tetra-iodothyronin, insulin-like growth factor 1, insulin and testosterone concentrations were higher in the Holstein group. In contrast, the Belgian Blue bulls appeared to produce more growth hormone. The slaughter weight, carcass weight, dressing percentage and proportion of lean meat were significantly higher in the Belgian Blue group. The characteristics of muscle mass (carcass weight, dressing percentage and proportion of lean meat) were positively correlated with creatinine and with the total peak area or peak amplitude of growth hormone. The insulin concentration was positively correlated with the proportion of adipose tissue in the carcass and negatively correlated with the proportion of muscle. There were no correlations between the carcass characteristics and insulin-like growth factor 1 or testosterone. No further information was provided when the ratios of the hormones were correlated with carcass characteristics. [less ▲]

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See detailLe saccharose: ses utilisations.
Thonart, Philippe ULg; Destain, Jacqueline ULg; Sandron, P. et al

in Annales de Gembloux (1990), 96(3),

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See detailLe saccharose: un passe ... vers quel avenir?
Thonart, Philippe ULg; Destain, Jacqueline ULg; Sandron, P. et al

in Annales de Gembloux (1990), 96(2), 87-174

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See detailL'apprentissage des langues étrangères: Aspects psycholinguistiques
Comblain, Annick ULg; Rondal, Jean-Adolphe ULg

in Langues Etrangères (1990), 26

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See detailConcept de filière, économie agro-alimentaire et développement.
Lebailly, Philippe ULg

in Tropicultura (1990), 8(1), 9-14

The subsector represents a meaningful and manageable division specially adapted to comprehensive investigation on agro-industrial systems. The food subsector studies permits an integrated approach of ... [more ▼]

The subsector represents a meaningful and manageable division specially adapted to comprehensive investigation on agro-industrial systems. The food subsector studies permits an integrated approach of problems linked with production development in Third World countries. The author of this paper, after having determined the concepts in relation with the subsector from theoretical point of vue presents the generaI characteristics of successful agro-industrial systems in developing countries and proposes a methodology to appreciate the competitivity of subsectors. [less ▲]

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See detailDirect and neurally mediated effects of halothane on pulmonary resistance in vivo.
Warner, David O; Vettermann, Jörg; Brichant, Jean-François ULg et al

in Anesthesiology (1990), 72(6), 1057-63

It has been suggested that halothane inhibits contraction of airway smooth muscle in vivo mainly by reducing reflex activity in nerves innervating the muscle with only minimal direct effects on the muscle ... [more ▼]

It has been suggested that halothane inhibits contraction of airway smooth muscle in vivo mainly by reducing reflex activity in nerves innervating the muscle with only minimal direct effects on the muscle itself. To examine possible mechanisms of action of halothane at clinically relevant concentrations the authors studied the effect of halothane on increases in pulmonary resistance (RL) produced by either vagus nerve stimulation (VNS, which caused neurally mediated constriction) or the inhalation of nebulized acetylcholine (ACh, which directly stimulated the smooth muscle cell) in nine mongrel dogs. The frequency of bilateral VNS and the dose of nebulized ACh were adjusted to produce approximately equal increases in RL. Halothane reduced the response to both types of stimulation in a dose-dependent fashion. At halothane concentrations greater than or equal to 0.4 MAC, the VNS response was significantly less than the ACh response. When tetrodotoxin was given to block neural activity, the ACh response was unchanged, confirming that neural activation did not contribute significantly to smooth muscle contraction in response to ACh. The authors conclude that in addition to neurally mediated effects, halothane at clinically used concentrations has significant direct effects on airway smooth muscle stimulated by ACh. The relative importance of each factor in vivo should depend on the stimulus that causes contraction of airway smooth muscle. [less ▲]

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See detailOrigin and evolution of monzonorites related to anorthosites
Duchesne, Jean-Clair ULg

in Schweizerische Mineralogische und Petrographische Mitteilungen = Bulletin Suisse de Minéralogie et Pétrographie (1990), 70

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See detailExpression in Escherichia coli of two mutated genes encoding the cholera toxin B subunit
L'Hoir, C.; Renard, A.; Martial, Joseph ULg

in Gene (1990), 89(1), 47-52

To allow subsequent genetically mediated fusion of foreign antigens to cholera toxin B subunit (CTB), two mutated CTB encoding genes (ctxB) were constructed and overexpressed in Escherichia coli. The ... [more ▼]

To allow subsequent genetically mediated fusion of foreign antigens to cholera toxin B subunit (CTB), two mutated CTB encoding genes (ctxB) were constructed and overexpressed in Escherichia coli. The signal peptide coding sequence was deleted and restriction sites were created at both ends of the modified sequence. Both synthesized CTBs contain additional amino acid(s) at the N terminus (one and three). They were purified as insoluble products and refolded into the natural pentameric CTB structure by a denaturation-renaturation cycle. After renaturation, both recombinant proteins recovered CTB antigenicity and the ability to bind to GM1 gangliosides, as shown by in vitro analysis. Preliminary data indicated that both properties were unaltered by fusion of a foreign peptide to the mutated CTBs. [less ▲]

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See detailLes bases de données en égyptologie
Winand, Jean ULg

in Revue. Informatique et Statistique dans les Sciences Humaines (1990), 26

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