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Publications ORBi OA
Evidence for the presence of N-methyl-D-aspartate receptors in the ventral tegmental area of the rat : an electrophysiological in vitro studySeutin, Vincent ; ; Massotte, Laurent et alin Brain Research (1990), 514(1), 147-150 Extracellular recordings were obtained from spontaneously active, presumed dopaminergic neurons of the ventral tegmental area (VTA) of the rat in a slice preparation. Bath-applied N-methyl-D-aspartate ... [more ▼] Extracellular recordings were obtained from spontaneously active, presumed dopaminergic neurons of the ventral tegmental area (VTA) of the rat in a slice preparation. Bath-applied N-methyl-D-aspartate (NMDA) (1-20 microM) activated all neurons tested (n = 36). This effect was clearly concentration-dependent (n = 14), quickly reversible and reproducible. No bursting type of discharge was observed during NMDA infusion. The NMDA receptor blocker DL-2-amino-5-phosphonovaleric acid (50 microM) reversibly antagonized the increase in cell firing produced with 10 microM NMDA by 83.5 +/- 3% (mean +/- S.E.M.) (n = 8, P less than 0.05). Lowering the Mg2+ concentration of the perfusion fluid to one-third of its normal value significantly enhanced the excitatory effect of 5 microM NMDA (n = 7, P less than 0.05), but not of 500 nM carbachol (n = 6). Finally, NMDA did not modify the sensitivity of dopaminergic autoreceptors of VTA neurons (n = 8), when compared to controls (n = 10). These observations strongly support the presence of specific NMDA receptors in the VTA. [less ▲] Detailed reference viewed: 5 (3 ULg) High-resolution spectroscopy of the C2 Swan 0-0 band from Comet P/Halley; ; et al in Astrophysical Journal (1990), 353 High-resolution spectra of the C2 Swan system's 0-0 band from Comet P/Halley in March 1986 show that the populations of the upper state's rotational levels may be described by two rotational temperatures ... [more ▼] High-resolution spectra of the C2 Swan system's 0-0 band from Comet P/Halley in March 1986 show that the populations of the upper state's rotational levels may be described by two rotational temperatures. The low rotational levels provide a low temperature, Trot = about 600 - 700 K. The higher levels correspond to about 3200 K. If a contribution from the 3200-K molecules is subtracted from the populations of the low-J-prime levels, the latter are characterized by Trot = about 190 K. A comparison with recent predictions for C2 molecules fluorescing in sunlight shows that the observed and predicted level populations are in good agreement for J-prime greater than about 15, but there is a sharp disagreement for the low rotational levels. [less ▲] Detailed reference viewed: 15 (0 ULg) Hypertension, obesity, is the dietary sodium restriction yet useful?Krzesinski, Jean-Marie ; ; et alin Acta Clinica Belgica (1990, April), 45(5), 359 Detailed reference viewed: 13 (1 ULg) Predicting the transverse volume distribution under an agricultural spray boom; Debouche, Charles ; in Crop Protection (1990), 9(2), 111-114 The volume distribution of spray below individual agricultural flat-fan spray nozzles was fitted to a truncated normal distribution. This expresses the parameters as a function of the spray liquid ... [more ▼] The volume distribution of spray below individual agricultural flat-fan spray nozzles was fitted to a truncated normal distribution. This expresses the parameters as a function of the spray liquid pressure, the boom height and the nozzle orifice size. This model was used to predict the transverse distribution below an agricultural spray boom. [less ▲] Detailed reference viewed: 12 (3 ULg) Modèle hydrogéologique en zone aride ou semi-arideDassargues, Alain ; Monjoie, Albéric ![]() in Génie para-sécheresse en zone aride (1990, March 12) Detailed reference viewed: 51 (11 ULg) Further observations of the light echoes from SN 1987 ADetal, Alain ; Surdej, Jean ; Hutsemekers, Damien et alin Astronomy and Astrophysics (1990), 229 Further direct observations of the light echoes from SN 1987 A were obtained on November 12 1988 with the 3.6-m telescope and EFOSC at ESO. In agreement with predictions made from earlier observations ... [more ▼] Further direct observations of the light echoes from SN 1987 A were obtained on November 12 1988 with the 3.6-m telescope and EFOSC at ESO. In agreement with predictions made from earlier observations, the radii of the two light rings are measured to be 43.3 and 72.5 arcsec. However, a noticeable diaplacement of the center of the outer ring by 2.6 arcsec to the NE from the SN position is also reported. Application of the model of planar-like sheets of material located between the SN and the observer leads to improved results. [less ▲] Detailed reference viewed: 7 (0 ULg) Photometry of comet Austin.Manfroid, Jean ; ; in The Messenger (1990), 59 Strömgren photometry of Gomet Austin (1989 c 1) has been obtained at La Silla with the ESO-SAT 50-cm telescope, between February 12 and February 25, 1990. Two diaphragms were selected, 35 arcsec and 240 ... [more ▼] Strömgren photometry of Gomet Austin (1989 c 1) has been obtained at La Silla with the ESO-SAT 50-cm telescope, between February 12 and February 25, 1990. Two diaphragms were selected, 35 arcsec and 240 arcsec, in an attempt to distinguish between the nucleus and the coma. [less ▲] Detailed reference viewed: 5 (1 ULg) Gabriel Tarde, L'Opinion et la FouleDurand, Pascal ![]() in Cahiers Internationaux de Psychologie Sociale (1990), 5 Detailed reference viewed: 91 (11 ULg) Identification of BlaR, the signal transducer for beta-lactamase production in Bacillus licheniformis, as a penicillin-binding protein with strong homology to the OXA-2 beta-lactamase (class D) of Salmonella typhimurium; ; Joris, Bernard et alin Journal of Bacteriology (1990), 172(2), 1137-1141 The blaR gene of Bacillus licheniformis encodes the signal transducer for induction of the class A beta-lactamase. The protein product, BlaR, has a hydrophilic carboxy region that binds beta-lactams and ... [more ▼] The blaR gene of Bacillus licheniformis encodes the signal transducer for induction of the class A beta-lactamase. The protein product, BlaR, has a hydrophilic carboxy region that binds beta-lactams and shows high sequence homology to the class D beta-lactamases, particularly the OXA-2 beta-lactamase of Salmonella typhimurium. The BlaR-beta-lactam complex is stable and may provide the continuing stimulus needed for the prolonged production of the enzyme. [less ▲] Detailed reference viewed: 14 (0 ULg) Transcriptional analysis of the DD-peptidase/penicillin-binding protein-encoding dac gene of Streptomyces R61: Use of the promoter and signal sequences in a secretion vectorFraipont, Claudine ; ; et alin Molecular & General Genetics [=MGG] (1990), (223), 114-120 Detailed reference viewed: 3 (2 ULg) Les structures prismatiques orthotropesRigo, Philippe ![]() in Association Internationale des Ponts et Charpente (1990) Detailed reference viewed: 34 (0 ULg) Characterization of the physiological work by measurement of plasma cortisol values in horses competing in 5 different sports disciplinesLinden, Annick ; ; Art, Tatiana et alin Archives Internationales de Physiologie et de Biochimie (1990, February) Detailed reference viewed: 15 (4 ULg) Calcul des Tribunes du Collège de ChaulnesDebongnie, Jean-François ![]() Report (1990) Calcul de la résistance des tribunes d'un collège français, en vue de leur certification par les pompiers. Detailed reference viewed: 19 (2 ULg) Spectrographie Bidimensionnelle de 2 Mirages Gravitationnels avec SILFID; ; Surdej, Jean ![]() in Bulletin d'Information du Télescope Canada-France-Hawaii (1990), 22 Not Available Detailed reference viewed: 10 (1 ULg) The Diversity of the Catalytic Properties of Class a Beta-LactamasesMatagne, André ; ; Joris, Bernard et alin Biochemical Journal (1990), 265(1), 131-46 The catalytic properties of four class A beta-lactamases were studied with 24 different substrates. They exhibit a wide range of variation. Similarly, the amino acid sequences are also quite different ... [more ▼] The catalytic properties of four class A beta-lactamases were studied with 24 different substrates. They exhibit a wide range of variation. Similarly, the amino acid sequences are also quite different. However, no relationships were found between the sequence similarities and the substrate profiles. Lags and bursts were observed with various compounds containing a large sterically hindered side chain. As a group, the enzymes could be distinguished from the class C beta-lactamases on the basis of the kappa cat. values for several substrates, particularly oxacillin, cloxacillin and carbenicillin. Surprisingly, that distinction was impossible with the kappa cat./Km values, which represent the rates of acylation of the active-site serine residue by the beta-lactam. For several cephalosporin substrates (e.g. cefuroxime and cefotaxime) class A enzymes consistently exhibited higher kappa cat. values than class C enzymes, thus belying the usual distinction between 'penicillinases' and 'cephalosporinases'. The problem of the repartition of class A beta-lactamases into sub-classes is discussed. [less ▲] Detailed reference viewed: 8 (2 ULg) Automated quantification of creatinine kinase MB isoenzyme in serum by radial partition immunoassay, with use of the Stratus analyzerChapelle, Jean-Paul ; in Clinical Chemistry (1990), 36(1), 99-101 We evaluated the analytical and clinical performances of a new radial partition immunoassay for measuring the mass concentration of creatine kinase (CK)-MB in serum. All pipetting, washes, incubations and ... [more ▼] We evaluated the analytical and clinical performances of a new radial partition immunoassay for measuring the mass concentration of creatine kinase (CK)-MB in serum. All pipetting, washes, incubations and data reduction were performed in 8 min by the Stratus (Dade) fluorometric analyzer. Within-assay and between-assay CVs were respectively 5.5% and 8.4% at 21 micrograms/L, and 4.2% and 3.4% at 48 micrograms/L. Assaying serial dilutions of serum samples with high CK-MB concentrations demonstrated excellent linearity. Results of the Stratus technique correlated well (n = 115, r = 0.98) with those of the Tandem-E CKMB II assay. There was no interference from hemolysis, bilirubin, rheumatoid factor, or added CK-MM (up to 3500 U/L); consequently, CK-MB can be determined in undiluted serum, even in the presence of high total CK activity. The mean CK-MB concentration in 105 blood donors was 1.9 (SD 1.3) micrograms/L. For seven myocardial infarction patients who received prompt fibrinolytic therapy, the mean CK-MB concentration was 4.5 (SD 1.8) micrograms/L at admission, and maximum concentrations, 119 (SD 94) micrograms/L, were recorded 16 h later. CK-MB returned to concentrations less than 10 micrograms/L within 72 h. [less ▲] Detailed reference viewed: 10 (3 ULg) A Comparison of bottom production in different event generatorsCudell, Jean-René ; ; et al(1990) Detailed reference viewed: 11 (9 ULg) Event generators for LHC; ; Cudell, Jean-René et alin Large Hadron Collider Workshop (1990) Detailed reference viewed: 8 (1 ULg) La recherche en volley-ball. Rapport du premier Colloque international sur la recherche en volley-ballCloes, Marc ![]() Book published by Presses Universitaires de Liège (1990) Detailed reference viewed: 3 (1 ULg) La recherche en pédagogie appliquée au volley-ballCloes, Marc ![]() in Cloes, Marc (Ed.) La recherche en volley-ball (1990) Comme dans les autres disciplines scientifique, il existe en pédagogie du sport plusieurs domaines ou orientations de recherches. Nous avons ainsi classé les études de pédagogie appliquées au volley-ball ... [more ▼] Comme dans les autres disciplines scientifique, il existe en pédagogie du sport plusieurs domaines ou orientations de recherches. Nous avons ainsi classé les études de pédagogie appliquées au volley-ball en deux grandes catégories: (1) des études centrées sur le développement de méthodes d'enseignement, et (2) les études liées à l'analyse systématique du processus d'entrainement. ... [less ▲] Detailed reference viewed: 20 (2 ULg) |
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