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See detailSystème HLA et greffe de moelle osseuse
Fillet, Georges ULg; Bury, Jean

in Revue Médicale de Liège (1983), 38

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See detailA transition state theory of non-adiabatic unimolecular reactions controlled by a conical intersection
Desouter, Michèle ULg; Sannen, Christian; Lorquet, Jean-Claude

in Journal of Chemical Physics (1983), 79

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See detailLes activités commerciales dans les secteurs piétonniers : structure et évolution
Merenne-Schoumaker, Bernadette ULg

in Analyse de l'Espace (1983), (2), 19-37

Comparison of the structure and the evolution of retailing in the pedestrian areas of ten French cities and a town in Belgium: Liege

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See detailThe missing UV opacity and the colours of solar-type stars
Magain, Pierre ULg

in Astronomy and Astrophysics (1983), 122

A simple method is proposed to take into account the "missing UV opacity" in solar-type stars. It is shown that the mere inclusion of that UV opacity through a very simple formula is sufficient to bring ... [more ▼]

A simple method is proposed to take into account the "missing UV opacity" in solar-type stars. It is shown that the mere inclusion of that UV opacity through a very simple formula is sufficient to bring the theoretical colours in agreement with observed ones for stars of different metal abundances and belonging to the spectral range from mid-F to late-G. Synthetic colours computed in the Geneva and UBV systems reproduce the various observed relations satisfactorily. The relations based on these colours allow reliable estimates of effective temperatures, surface gravities and metal abundances of stars. In addition, solar colours are obtained and three more solar twin candidates are proposed. [less ▲]

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See detailExperimental hypertension: early changes in collagen metabolism
Foidart, Jean-Michel ULg; Rorive, Georges ULg; Carlier, P. G. et al

in Revue Médicale de Liège (1983), 38(12), 537-49

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See detailVirtual pair creation in nuclear Dirac phenomenology
Bawin, Michel ULg; Jaminon, Martine ULg

in Nuclear Physics A (1983), 407

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See detailThe Dissociative Electroionization of Nitrous Oxide. The O+ Dissociation Channel.
Olivier, J. L.; Locht, Robert ULg; Momigny, J.

in International Journal of Mass Spectrometry and Ion Physics (1983), 46

By electroionization mass spectrometry and ion kinetic energy analysis, the O+ fragment ion formation from N2O has been analyzed. Different appearance energies are measured and interpreted. Between the ... [more ▼]

By electroionization mass spectrometry and ion kinetic energy analysis, the O+ fragment ion formation from N2O has been analyzed. Different appearance energies are measured and interpreted. Between the onset at 15.27 eV and 22 eV only two dissociation limits are involved, i.e. O+(4S)+N2(X1Sigma+/g) at 15.29 eV and O+(2D)+N(X1Sigma+/g) at 18.61 eV. In both cases N2(X1Sigma+/g) is produced in its v=0 up to v=8 vibrational levels. Predissociation of ionic and Rydberg states of N2O are the dominant processes. [less ▲]

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See detailLes prostaglandines : biosynthèse et pharmacologie
Hanzen, Christian ULg

in Annales de Médecine Vétérinaire (1983), 127

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See detailMiospores et acritarches de la Formation d'Hydrequent (Frasnien Supérieur à Famennien Inférieur, Boulonnais, France).
Loboziak, S; Streel, Maurice ULg; Vanguestaine, M

in Annales de la Société Géologique de Belgique (1983), 106

See detailTobacco and pregnancy
Foidart, Jean-Michel ULg

in Revue Médicale de Liège (1983), 38(17), 655-63

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See detailConformational analysis of the calcium-antagonist gallopamil.
Brasseur, Robert ULg; Deleers, M.; Malaisse, W. J.

in Biochemical Pharmacology (1983), 32(3), 437-40

Conformational analysis of gallopamil was performed in order to gain insight into the molecular determinant of its calcium-antagonistic property. Whereas the neutral form of gallopamil was characterized ... [more ▼]

Conformational analysis of gallopamil was performed in order to gain insight into the molecular determinant of its calcium-antagonistic property. Whereas the neutral form of gallopamil was characterized by a single, largely predominant configuration, the protonated form of the drugs yielded several conformers, some of which were characterized by a readily accessible ionized site. The capacity of gallopamil to inhibit ionophore-mediated calcium translocation in a two-phase bulk system was inversely related to the pH of the aqueous phase. These findings indicate that the capacity of gallopamil to interfere with the transport of cations is critically dependent on the availability of a protonated configuration of the drug. [less ▲]

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See detailAlternatives possibles a la mise en decharge des boues de papeteries. Un exemple: Wiggins Teape.
Paquot, Michel ULg; Hermans, L.

in Tribune du CEBEDEAU (1983), 36(473),

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See detailElectrical and mechanical activity of the cervix in the ewe during pregnancy and parturition.
Toutain, P. L.; Garcia-Villar, R.; Hanzen, Christian ULg et al

in Journal of Reproduction and Fertility (1983), 68

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See detailIconographies de saints mosans : Paris, B. Nat. Ms. 412
George, Philippe ULg

in Bulletin de la Société Royale Le Vieux-Liège (1983), N° 221-222

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See detailRogier Potier, de l'écriture au style
Duchesne, Jean-Patrick ULg

in Art&Fact (1983), 2

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See detailTemporal Logic Can Be More Expressive
Wolper, Pierre ULg

in Information and Control (1983), 56(1--2), 72--99

We first review Temporal Logic and prove that there are some properties of sequences that it cannot express, though these are expressible using for instance regular expressions. Then, we show how Temporal ... [more ▼]

We first review Temporal Logic and prove that there are some properties of sequences that it cannot express, though these are expressible using for instance regular expressions. Then, we show how Temporal Logic can be extended to express any property definable by a right-linear grammar and hence a regular expression. Finally, we give a complete axiomatization and a decision procedure for the extended Temporal Logic and examine its complexity. [less ▲]

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See detailDossier. Pour l'essor du mécénat en Belgique francophone
Duchesne, Jean-Patrick ULg; Gilson, Philippe; Graulich, Jean-Luc et al

in Art&Fact (1983), 2

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See detailDifférenciation de paramyxovirus aviaires
Vindevogel, Henri ULg; Pastoret, Paul-Pierre ULg; Thiry, Etienne ULg et al

in Annales de Médecine Vétérinaire (1983), 127

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See detailIntramolecular Dynamics of Molecular Ions.
Lorquet, Jean-Claude ULg; Lorquet, Andrée ULg; Dehareng, Dominique ULg et al

in Bulletin de la Société Chimique Belge (1983), 92(6/7), 609-611

The Fourier transform of an electronic spectrum gives a direct dynamic information on the nuclear motion of a wavepacket on the potential energy surface of the final state reached in the electronic ... [more ▼]

The Fourier transform of an electronic spectrum gives a direct dynamic information on the nuclear motion of a wavepacket on the potential energy surface of the final state reached in the electronic transition, at least during the first few molecular vibrations. The method is valid for both adiabatic and non-adiabatic situations. It has proved its usefulness in the study of molecular processes such as Duchinsky effect, fast predissociations and internal conversions. [less ▲]

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See detailEtude dendrométrique du sapin de Douglas (Pseudotsuga menziesii FRANCO)
Thill, A.; Palm, Rodolphe ULg

in Bulletin des Recherches Agronomiques de Gembloux (1983), 18(1), 25-44

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See detailLes animaux responsables de pollutions de l'environnement
Nicks, Baudouin ULg

in Bulletin d'information de l'association universitaire pour l'environnement (1983)

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See detailMétropoles d'Europe
Merenne-Schoumaker, Bernadette ULg

in Documentation photographique (1983), 6066

Study of recent changes in the major city in Europe based on examples in 8 cities: Budapest, Brussels, Hamburg, Lyon, Manchester, Naples, Stockholm and Vienna

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See detailThe relationship of human atrial cellular electrophysiology to clinical function and ultrastructure.
Mary-Rabine, L; Albert, Adelin ULg; Pham, T.D. et al

in Circulation Research (1983), 52(2), 188-99

Although previous studies have described the electrophysiological and ultrastructural characteristics of human cardiac fibers, no attempt has been made as yet to describe quantitatively the relationship ... [more ▼]

Although previous studies have described the electrophysiological and ultrastructural characteristics of human cardiac fibers, no attempt has been made as yet to describe quantitatively the relationship between the ultrastructural and cellular electrophysiological derangements occurring with cardiac disease, and their clinical manifestations. In this study, we used standard microelectrode techniques to record the action potential characteristics of human atrial fibers obtained during cardiac surgery and correlated the electrophysiological parameters with clinical and ultrastructural data. Ultrastructure was studied by optical and electron microscopy. We found a multiple linear regression among maximum diastolic potential, atrial size and pressure, P wave duration and ultrastructure changes. Proliferations of Z band material, widening of intercalated discs, and degenerative changes were quantified and correlated with electrophysiological and clinical data. These studies emphasize the relationship between hemodynamic anomalies and resultant changes in both human atrial fiber structure and electrical function. Finally, the likelihood of occurrence of arrhythmias can be predicted using the analytic method described. [less ▲]

See detailCrystallographic data for the beta-lactamase from Enterobacter cloacae P99.
Charlier, Paulette ULg; Dideberg, O.; Frère, Jean-Marie ULg et al

in Journal of Molecular Biology (1983), 171(2), 237-8

The beta-lactamase from Enterobacter cloacae P99 has been crystallized from polyethylene glycol solution at pH 7. X-ray examination of the orthorhombic crystals shows the space group is P2(1)2(1)2 with ... [more ▼]

The beta-lactamase from Enterobacter cloacae P99 has been crystallized from polyethylene glycol solution at pH 7. X-ray examination of the orthorhombic crystals shows the space group is P2(1)2(1)2 with unit cell dimensions a = 77.4 A, b = 69.4 A, and c = 63.6 A. There is one molecule of molecular weight 39,000 in the asymmetric unit. [less ▲]

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See detailScanning electron microscope study and computer analysis of taxonomic distances of the marin Podonidae (Cladocera)
Meurice, Jean-Claude; Dauby, Patrick ULg

in Journal of Plankton Research (1983), 5

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See detailL'urgence microchirurgicale en cas de section nerveuse peripherique.
LECLERCQ, Daniel ULg; CARLIER, Alain ULg; KHUC, Toan ULg et al

in Revue Médicale de Liège (1983), 38(9), 356-61

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See detailAbortion in mice induced by intravenous injections of antibodies to type IV collagen or laminin.
Foidart, Jean-Michel ULg; Yaar, M.; Figueroa, A. et al

in American Journal of Pathology (1983), 110(3), 346-57

Purified antibodies to laminin or Type IV collagen administered intravenously to pregnant mice were found to localize in the basement membranes of all maternal tissues as well as the parietal and visceral ... [more ▼]

Purified antibodies to laminin or Type IV collagen administered intravenously to pregnant mice were found to localize in the basement membranes of all maternal tissues as well as the parietal and visceral yolk sacs and trophoblast basement membranes but not in embryonic tissues. Antibodies to Type IV collagen induced a higher incidence of abortions, retroplacental hematomas and fetal deaths. When administered intraamniotically, both antiserums were embryotoxic. The functional consequences of the attachment of antibodies to these specific basement membrane antigens appear to be hemorrhage within the parietal and visceral yolk sacs and separation of fetal from maternal tissues. Complement activation appears to play an important role in the interruptions of pregnancy, because this was not observed in strains of mice lacking C5, the fifth component of complement, in mice depleted of C3 by administration of cobra venom factor, or in mice injected with the F(ab) fragments of antibody to Type IV collagen or laminin. [less ▲]

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See detailDonnees nouvelles sur l'organisation morphologique de la moelle humaine.
Schoenen, Jean ULg

in Revue d'Eléctroencephalographie et de Neurophysiologie Clinique (1983), 13(3), 317-9

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See detailPainful legs and moving toes: démembrement clinique et physiopathologique du syndrome
Schoenen, Jean ULg; Gonce, Michel ULg; Delwaide, P. J.

in Acta Neurologica Belgica (1983), 83

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See detailL’autofinancement des coopératives de travailleurs et la théorie économique
Defourny, Jacques ULg

in Annals of Public and Cooperative Economics = Annales de l'Economie Publique, Sociale et Coopérative (1983)

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See detailLES ARCHIVES SONORES DE LA MEDIATHEQUE PROVINCIALE DE LIEGE - Des sons et des hommes
Sacré, Robert ULg

in Télé Moustique (1982), (2967), 40-52

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See detailPenicillin-binding proteins and carboxypeptidase/transpeptidase activities in Proteus vulgaris P18 and its penicillin-induced stable L-forms
Rousset, André; Nguyen-Distèche, Martine ULg; Minck, Raymond et al

in Journal of Bacteriology (1982), 152(3), 1042-1048

The originally penicillin-induced, wall-less stable L-forms of Proteus vulgaris P18, isolated by Tulasne in 1949 and since then cultured in he absence of penicillin, have kept the ability to synthesize ... [more ▼]

The originally penicillin-induced, wall-less stable L-forms of Proteus vulgaris P18, isolated by Tulasne in 1949 and since then cultured in he absence of penicillin, have kept the ability to synthesize the seven penicillin-binding proteins and the various DD- and LD-peptidase activities found in the parental bacteria and known to be involved in wall peptidoglycan metabolism. The stable L-forms, however, secrete during growth both the highly penicillin-sensitive, DD-carboxy-peptidase-transpeptidase penicillin-binding protein PBP4 (which in normal bacteria is relatively loosely bound to the plasma membrane) and the penicillin-insensitive LD-carboxypeptidase (which in normal bacteria is located in the periplasmic region). [less ▲]

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See detailThe variability of RR Tel
Heck, A.; Manfroid, Jean ULg

in The Messenger (1982), 30

Photometric measurements of RR Tel performed at ESO are discussed. RR Tel is a galactic nova which has been associated with a sole outburst, observed in 1944. The photometric observations were made in the ... [more ▼]

Photometric measurements of RR Tel performed at ESO are discussed. RR Tel is a galactic nova which has been associated with a sole outburst, observed in 1944. The photometric observations were made in the ubvy system in August 1981, when a strong brightening was detected in V. IUE data subjected to a Fourier analysis indicate that the object has a period within 5 days of 395 days. Measurements of brightening of the J component also yield a period of 390 days. The presence of a Mira variable is considered, noting the supporting evidence from H2O and TiO spectral bands, but equally the lack of IR data until after 1960. It is suggested that data from before 1944 indicate that modulated bursts of mass transfer and accompanying accretion events preceeded the outburst of the underlying binary star, which could be a link between dwarf novae, classical novae, and symbiotic stars. [less ▲]

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See detailEssai de diagnostic externe de processus de changements dans les Petites et Moyennes Entreprises, partie III
Corhay, Albert ULg; De Bruyn, Christian; Ghammachi, Kamel

in Revue belge des Sciences Commerciales (1982)

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See detailThe far-UV spectrum of the low-excitation planetary nebula HD 138403
Surdej, Jean ULg; Heck, A.

in Astronomy and Astrophysics (1982), 116

Two high-resolution far-UV spectra of the low-excitation planetary nebula HD 138403 are analyzed which were obtained with the IUE satellite over the wavelength range from 1170 to 2070 A. It is shown that ... [more ▼]

Two high-resolution far-UV spectra of the low-excitation planetary nebula HD 138403 are analyzed which were obtained with the IUE satellite over the wavelength range from 1170 to 2070 A. It is shown that the nebula's far-UV spectrum comprises a stellar continuum on which are superimposed a few emission lines, numerous interstellar absorption lines, and various types of P Cygni profiles. Evidence is examined for substantial mass loss from the central nucleus, with terminal velocities of the order of 800 km/s. The observed nebular emissions are used to derive the electron density in the main nebula. The results are taken as supporting the hypothesis that a bipolar structure is expanding around HD 138403 via a selective radiation process involving an edge- or line-locking mechanism or both. [less ▲]

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See detailRotation-Invariant Optical Processing
Hansen, Eric W.; Verly, Jacques ULg; Keirstead, E. Burt

in Journal of the Optical Society of America (1982), 72(12), 1670-1676

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See detailTransport of aurorally produced N/2D/ by winds in the high latitude thermosphere
Gérard, Jean-Claude ULg; Roble, R. G.

in Planetary and Space Science (1982), 30

A time-dependent, two-dimensional model is developed for describing the meridional circulation of thermospheric odd nitrogen species produced in the auroral zone. The model is based on a previous model by ... [more ▼]

A time-dependent, two-dimensional model is developed for describing the meridional circulation of thermospheric odd nitrogen species produced in the auroral zone. The model is based on a previous model by Roble and Gary (1979) extended to upper altitude transport of the nitrogen species. Assumptions made include the existence of a steady neutral wind flowing from low to high latitudes, and an initial background due to scattered Lyman-beta and nightglow emissions. The aurora is also assumed as steady, along with a constant ion production. Predictions made using the model are compared with observations with the Atmosphere Explorer C spacecraft and rocket sounding measurements of the 5200 A distribution near the day-side polar cusp. The model requires thermospheric winds of 100-200 m/sec, flowing from day to nightside. Convective velocities near 1000 m/sec were detected by the Explorer spacecraft, as well as a day-to-nightside flow at the cusp. [less ▲]

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See detailThe thermospheric heating efficiency under electron precipitation conditions
Singh, V.; Gérard, Jean-Claude ULg

in Planetary and Space Science (1982), 30

The results of a study of the altitude distribution of particle heating due to magnetospheric electron penetration into the atmosphere are presented. Updated chemical species data were used in the study ... [more ▼]

The results of a study of the altitude distribution of particle heating due to magnetospheric electron penetration into the atmosphere are presented. Updated chemical species data were used in the study, and attention was given to day- and night-side precipitation energy fluxes. The data base on chemical species was obtained from the Atmosphere Explorer C spacecraft and lower altitude observations. A system of 16 continuity equations was employed to formulate a time-dependent auroral model covering reactions and rate coefficients of electrons and O, O2, N2, NNO, and N ions. The heating efficiency of direct dissociation of atmospheric molecules, exothermic chemical reactions involving ions, ground state and metastable neutral species, and cooling of the thermal electrons was calculated. The calculations indicate that over 60 percent of the energy input is transferred to the neutral gas. Particle heating can exceed 1 erg/sq cm per sec. [less ▲]

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See detailDetermination of mass-loss rates from the first order moment W1 of unsaturated Cygni line profiles
Surdej, Jean ULg

in Astrophysics & Space Science (1982), 88

The relationship between the first order moment and the mass loss rate is investigated within the framework of the Sobolev approximation (1947, 1957, 1958) under various physical and geometrical ... [more ▼]

The relationship between the first order moment and the mass loss rate is investigated within the framework of the Sobolev approximation (1947, 1957, 1958) under various physical and geometrical conditions. By assuming that the size of the expanding envelope from which the observed P Cygni profiles arise is large with respect to the central stellar core, a general expression for the n-th order moment is obtained for the case of a point-like source in terms of the usual parameters inherent to Sobolev-type theories. It is then shown how the first result is altered when considering separately the effects due to collisions and rotation, the presence of the underlying photospheric absorption line, the finite size of the central core, and the limb-darkening of the stellar core. It is concluded that the total uncertainty of the mass loss rate determination made with the approach proposed here should be less than 60 percent. [less ▲]

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See detailEssai de diagnostic externe de processus de changements dans les Petites et Moyennes Entreprises, partie II
Corhay, Albert ULg; De Bruyn, Christian; Gnammachi, Kamel

in Revue Belge des Sciences Commerciales (1982)

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See detailPenicillin target enzyme and the antibiotic binding site
Kelly, Judith A.; Moews, Paul C.; Knox, James R. et al

in Science (1982), 218(4571), 479-481

The three-dimensional structure of a penicillin-sensitive D-alanyl-carboxypeptidase-transpeptidase has been determined by x-ray crystallography to a resolution of 2.8 angstroms. The site of binding of the ... [more ▼]

The three-dimensional structure of a penicillin-sensitive D-alanyl-carboxypeptidase-transpeptidase has been determined by x-ray crystallography to a resolution of 2.8 angstroms. The site of binding of the beta-lactam antibiotics penicillin and cephalosporin has been located. These findings constitute direct observation of the interaction of beta-lactams with a transpeptidase enzyme and establish the feasibility of defining the molecular stereochemistry of this interaction for purposes of drug design. [less ▲]

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See detailIsolation of the membrane-bound 26 000-Mr penicillin-binding protein of Streptomyces strain K15 in the form of a penicillin-sensitive D-alanyl-D-alanine-cleaving transpeptidase
Nguyen-Distèche, Martine ULg; Leyh-Bouille, Mélina; Ghuysen, Jean-Marie ULg

in Biochemical Journal (1982), 207(1), 109-115

The membrane-bound, 26 000-Mr penicillin-binding protein of Streptomyces K15 has been isolated in the form of an effective, penicillin-sensitive D-alanyl-D-alanine-cleaving peptidase exhibiting high ... [more ▼]

The membrane-bound, 26 000-Mr penicillin-binding protein of Streptomyces K15 has been isolated in the form of an effective, penicillin-sensitive D-alanyl-D-alanine-cleaving peptidase exhibiting high transpeptidase activity (greater than 95%) and very low carboxy-peptidase activity (less than 5%). The penicillin-binding protein/transpeptidase can be extracted directly from the mycelium with N-cetyl-NNN-trimethylammonium bromide (Cetavlon) and subsequently obtained at 90% purity and with an 8000-fold specific enrichment (when compared with the activity of the isolated membranes) by a two-step procedure involving Sephadex filtration and affinity chromatography on ampicillin-linked CH Sepharose 4B in the presence of detergent. At saturating concentrations of the co-substrates diacetyl-L-Lys-D-Ala-D-Ala and Gly-Gly, the catalytic-centre activity is about 0.3 s-1. [less ▲]

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See detailCollimator Effects in High Resolution X-ray Computed Tomography
Verly, Jacques ULg

in IEEE Transactions on Medical Imaging (1982), MI-1(2), 122-136

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See detailEssai de diagnostic externe de processus de changements dans les Petites et Moyennes Entreprises, partie I
Corhay, Albert ULg; De Bruyn, Christian; Ghammachi, Kamel

in Revue Belge des Sciences Commerciales (1982)

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See detailIs HD 90994 a "Reduction Variable"?
Heck, A.; Manfroid, Jean ULg

in Information Bulletin on Variable Stars (1982), 2199

Not Available

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See detailA Note on Two Be Stars
Heck, A.; Manfroid, Jean ULg

in Information Bulletin on Variable Stars (1982), 2198

Not Available

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See detailCerebellar macroneurons in microexplant cell culture. Postsynaptic amino acid pharmacology.
Macdonald, R. L.; Moonen, Gustave ULg; Neale, E. A. et al

in Brain Research (1982), 281(1), 75-88

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See detailCalcul et choix du serrage d'une paire de roulements à contact oblique
Debongnie, Jean-François ULg

in Revue Mécanique - M (1982), 28(3), 171-183

The concern of this paper is the behaviour of a system consisting of two angular contact rolling element bearings. The author's aim is to develop rational rules for a proper choice of the preload, as a ... [more ▼]

The concern of this paper is the behaviour of a system consisting of two angular contact rolling element bearings. The author's aim is to develop rational rules for a proper choice of the preload, as a function of the desired effect on the life or the stiffness of the bearing arrangement. [less ▲]

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See detailEvaluation of the lipid-drug association constant in model membranes: A monolayer approach
Goormaghtigh, E.; Brasseur, Robert ULg; Vanderbranden, M. et al

in Bioelectrochemistry and Bioenergetics (Lausanne, Switzerland) (1982), 9(4), 489-498

A general procedure of evaluation of the lipid-drug association constant in monolayer is presented. Lipids are spread at the air-water interface and the drugs injected into the aqueous subphase ... [more ▼]

A general procedure of evaluation of the lipid-drug association constant in monolayer is presented. Lipids are spread at the air-water interface and the drugs injected into the aqueous subphase. Association constant potential and predictions from the Gouy-Chapman theory. Several procedures of calculation are described. [less ▲]

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See detailAcide cyclohexyl-4 naphtalène-1-propionique
Dupont, Léon; Dideberg, Otto; Dive, Georges ULg et al

in Acta Crystallographica. Section B-Structural Crystallography and Crystal Chemistry (1982), 38(9), 2409-2411

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See detailA statistical analysis of the theoretical results obtained for concerted 1,3-dipolar cycloaddition
Sana, Michel; Leroy, Georges; Dive, Georges ULg et al

in Journal of Molecular Structure : Theochem (1982), 89(1-2), 147-163

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See detailCerebellar macroneurons in microexplant cell culture. Methodology, basic electrophysiology, and morphology after horseradisch peroxidase injection.
Moonen, Gustave ULg; Neale, E. A.; Macdonald, R. L. et al

in Brain Research (1982), 281(1), 59-73

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See detailAugust 1981 Crisis of V348 Sgr
Heck, A.; Houziaux, Léo ULg; Manfroid, Jean ULg

in Information Bulletin on Variable Stars (1982), 2184

Not Available

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See detailComparaison between Numerical and Experimental Results in Study of Offshore Structure Movements
Marchal, Jean ULg; Lejeune, A.; Hoffay, T. et al

in Proceeding of the Int. Conf. Washington D.C. (1982)

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See detailA model of energy deposition of energetic electrons and EUV emission in the Jovian and Saturnian atmospheres and implications
Gérard, Jean-Claude ULg; Singh, V.

in Journal of Geophysical Research (1982), 87

A model of the interaction between incident electron precipitation and H2 atmospheres is described. The local degraded primary and secondary electron energy distributions are calculated by using the ... [more ▼]

A model of the interaction between incident electron precipitation and H2 atmospheres is described. The local degraded primary and secondary electron energy distributions are calculated by using the continuous slowing down approximation. The altitude distribution of the ionization rate and various H and EUV H2 emissions are calculated for four different incident electron spectra. A total EUV H2 emission efficiency of 10.6 kR/incident erg/sq cm per sec is obtained for a pure H2 atmosphere. Comparison with the Voyager Jupiter observations indicates that an incident energy flux of about 8 ergs/sq cm per sec was present at the time of the encounter if the emission is located in an H2-dominated region. The local thermospheric heating rate was about 4 ergs/sq cm per sec for Jupiter and of the order of 0.1 erg/sq cm per sec for Saturn. A globally averaged atomic hydrogen production rate of about 1 x 10 to the 10th atoms/sq cm per sec is induced by the Jovian auroral electron precipitation, largely exceeding the solar EUV dissociation rate. [less ▲]

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See detailEtude de la mobilité sagittale et frontale du tronc chez des recrues
François, R. J.; Van Linthoudt, D.; Debouche, Charles ULg et al

in Acta Medicinalia Militaria Belgica (1982), 2

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See detailEffets de trois Alcaloides Extraits du Strychnos usambarensis sur des Cellules Cancereuses en Culture
Bassleer, Roger ULg; Gillet, Marie-Claire ULg; Massart, B. et al

in Planta Medica (1982), 45(6), 123-6

The cellular effects of three alkaloids isolated from STRYCHNOS USAMBARENSIS (melinonine F, strychnofoline, 18-19-dihydro-usambarine) are analysed by cytological methods in experimental animal tumours ... [more ▼]

The cellular effects of three alkaloids isolated from STRYCHNOS USAMBARENSIS (melinonine F, strychnofoline, 18-19-dihydro-usambarine) are analysed by cytological methods in experimental animal tumours cultivated IN VITRO (B 16 mouse melanoma cells, mouse Ehrlich tumour cells ELT, HW 165 rat hepatoma). Under some experimental conditions, a certain degree of antimitotic activity is demonstrated. [less ▲]

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See detailAU TEMPS OU LA BELGIQUE JAZZAIT - Du " Jazz Pour Tous" à Comblain-la-Tour
Sacré, Robert ULg

in Télé Moustique (1982), (2937), 51-73

Nicolas DOR et Jean Marie PETERKEN, animateurs de JAZZ POUR TOUS à la RTB depuis 1956, créent le Festival de jazz de Comblain-la-Tour en 1959 avec Joe Napoli : ils se souviennent...

Detailed reference viewed: 6 (1 ULg)
See detailStructure de l'hydrogénonitrate de l'isopropyl-1 {[(pipéridyl-1 amino)-4 pyridyl-3]sulfonyl}-3 urée
Dupont, Léon; Dideberg, Otto; Delarge, Jacques et al

in Acta Crystallographica. Section B-Structural Crystallography and Crystal Chemistry (1982), 38(5), 1495-1500

Detailed reference viewed: 11 (1 ULg)
See detailZeta Potential of Yeast Cells : Application in cell immobilization.
Thonart, Philippe ULg; Custinne, M.; Paquot, Michel ULg

in Enzyme & Microbial Technology (1982), 4

Detailed reference viewed: 14 (2 ULg)
See detailKainic acid sensitivity of mammalian Purkinje cells in monolayer cultures.
Gibbs, W.; Neale, E. A.; Moonen, Gustave ULg

in Brain Research (1982), 256(1), 103-108

Detailed reference viewed: 5 (0 ULg)
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See detailDelta 2- and delta 3-cephalosporins, penicillinate and 6-unsubstituted penems. Intrinsic reactivity and interaction with beta-lactamases and D-alanyl-D-alanine-cleaving serine peptidases
Frère, Jean-Marie ULg; Kelly, Judith A; Klein, Daniel et al

in Biochemical Journal (1982), 203(1), 223-234

The intrinsic reactivity of delta 2- and delta 3-deacetoxy-7-phenylacetamidocephalosporanates, penicillanate, unsubstituted, 2-methyl- and 2-phenyl-penems and other beta-lactam antibiotics has been ... [more ▼]

The intrinsic reactivity of delta 2- and delta 3-deacetoxy-7-phenylacetamidocephalosporanates, penicillanate, unsubstituted, 2-methyl- and 2-phenyl-penems and other beta-lactam antibiotics has been expressed in terms of the second-order rate constant (M-1.s-1(OH-)) for the hydrolysis of the beta-lactam amide bond by OH- at 37 degrees C. The values thus obtained have been compared with the second-order rate constants (M-1.s-1(enzyme) for the opening of the same beta-lactam amide bond during interaction with the beta-lactamases of Streptomyces albus G and Actinomadura R39 and the D-alanyl-D-alanine-cleaving serine peptidases of Streptomyces R61 and Actinomadura R39. Depending on the cases, the accelerating effect due to enzyme action and expressed by the ratio M-1.s-1(enzyme)/M-1.s-1(OH) varies from less than 2 to more than 1 x 10(6). The primary parameter that governs enzyme action is the goodness of fit of the beta-lactam molecule to the enzyme cavity rather than its intrinsic reactivity. With the D-alanyl-D-alanine-cleaving serine peptidases, the three penems studied form intermediate complexes characterized by very short half lives of 14-100 s, values significantly lower than those exhibited by most beta-lactam compounds. [less ▲]

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See detailPour une pédagogie du discours
Dumortier, Jean-Louis ULg

in Revue de la Direction Générale de l’Organisation des Etudes (1982)

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See detailL'art de l'emballage de disque en Belgique
Duchesne, Jean-Patrick ULg

in Cahiers du C.A.C.E.F. (1982)

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See detailOn the use and computation of likelihood ratios in clinical chemistry.
Albert, Adelin ULg

in Clinical Chemistry (1982), 28(5), 1113-9

The clinical relevance of likelihood ratios (L-values) for revising the physician's diagnostic probabilities has been recognized. However, the calculation of L-values, particularly in the case of ... [more ▼]

The clinical relevance of likelihood ratios (L-values) for revising the physician's diagnostic probabilities has been recognized. However, the calculation of L-values, particularly in the case of quantitative or mixed quantitative-binary test results, raises problems that have not yet been addressed. Based on a very general assumption that yields a simple functional form for the likelihood ratio, a method is developed that allows such calculations regardless of the nature and the number of clinical laboratory tests to be interpreted simultaneously. Hence the notion of predictive value (posterior probability) is extended from binary or dichotomized tests to quantitative tests, and from univariate to multivariate clinical laboratory results. The simplicity and flexibility of this approach eliminates difficulties in computation arising from the addition of new data to an existing data base. It is hoped that this method will now allow L-values to be reported along with the original test results in daily laboratory practice. [less ▲]

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See detailHomologous and hybrid calcium complexes of A23187 and hypoglycemic sulfonylureas: nuclear magnetic resonance and conformational analysis.
Deleers, M.; Brasseur, Robert ULg; Gelbcke, M. et al

in Journal of Inorganic Biochemistry (1982), 16(3), 215-25

Hypoglycemic sulfonylureas (e.g., gliclazide) are able to transport calcium across hydrophobic domains. Gliclazide and the ionophore A23187 act synergistically upon calcium transport. One calcium atom is ... [more ▼]

Hypoglycemic sulfonylureas (e.g., gliclazide) are able to transport calcium across hydrophobic domains. Gliclazide and the ionophore A23187 act synergistically upon calcium transport. One calcium atom is complexed by either two molecules of sulfonylureas (or A23187) or one molecule each of sulfonylurea and A23187; the existence of such hybrid complexes has been documented by nuclear magnetic resonance. Conformation analysis of the calcium-gliclazide complex suggests close apposition of the toluyl groups in the gliclazide molecules. [less ▲]

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See detailEvaluation of the anesthetic-lipid association constant. A monolayer approach.
Guilmin, T.; Goormaghtigh, E.; Brasseur, Robert ULg et al

in Biochimica et Biophysica Acta (1982), 685(2), 169-76

A new approach is presented which allows to describe the binding of different local anesthetics to lipids. Lipids (DL- alpha-dipalmitoylphosphatidylcholine, phosphatidylserine, cardiolipin) are spread at ... [more ▼]

A new approach is presented which allows to describe the binding of different local anesthetics to lipids. Lipids (DL- alpha-dipalmitoylphosphatidylcholine, phosphatidylserine, cardiolipin) are spread at the air-water interface and the anesthetic (procaine, butacaine, tetracaine) injected into the aqueous subphase. The equilibrium constants associated to the interfacial reaction: D+ (subphase) +L- (monolayer) in equilibrium DL (monolayer) (where D+ denotes the anesthetics, L- the lipid anionic site and DL the complex) are calculated from an experimental evaluation of the surface potential of the lipid monolayer. This mode of determination is based essentially on the good correlation between the experimental values of the surface potential and the theoretical predictions from the Gouy-Chapman theory. Fluorescence measurements on liposomes are carried out in order to locate the position of the drug in the lipid layer. This method can be extended to any positively charged drug-anionic lipid interaction. [less ▲]

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See detailFast freezing of cow embryos in French straws with an automatic program.
Massip, A.; Van der Zwalmen, P.; Hanzen, Christian ULg et al

in Theriogenology (1982), 18(3), 325-332

Cow embryos between day 6.5 and 9 were frozen in 1.5M DMSO in PBS at 2 degrees C/min from seeding to -25 degrees C before being plunged into liquid nitrogen directly or after 10 min at -25 degrees C ... [more ▼]

Cow embryos between day 6.5 and 9 were frozen in 1.5M DMSO in PBS at 2 degrees C/min from seeding to -25 degrees C before being plunged into liquid nitrogen directly or after 10 min at -25 degrees C. Cooling rate from 20 degrees C to -5 degrees C was 9 degrees C/min. Seeding was induced automatically at -5 degrees C by injection of liquid nitrogen vapour. Embryos were subsequently thawed by direct transfer to water at 20 degrees C (group I) or at 37 degrees C (group II). Survival was assessed by culture in vitro and by transfer. In group I, 35.7% were degenerated after thawing (compared to 35.4% in group II). Survival rate after culture in vitro for 24h was not significantly different (48.3% vs 42.8%) and hatching rate after 96h culture was quite similar (33.3% vs 34.4%). In group II, four pregnancies were obtained from 10 embryos transferred. Time at -25 degrees C did not improve the results. Automatic seeding did not impair survival. These results show that the quality of the embryo is the determinant factor for survival after freezing and that the plastic straw is the most suitable vessel for freezing, storage and transfer of embryos. [less ▲]

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See detailForaminifères, Spores et Coraux du Famennien supérieur et du Dinantien du Massif de l'Omolon (Extrème-Orient soviétique).
Conil, R; Poty, E; Simakov, K.V. et al

in Annales de la Société Géologique de Belgique (1982), 105

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See detailIconographies de saints mosans : Bruxelles, BR Ms. 10326
George, Philippe ULg

in Bulletin de la Société Royale Le Vieux-Liège (1982), 216

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See detailDosage radioimmunologique de l'hormone placentaire somatotrope et mammotrope bovine
Beckers, Jean-François ULg; De Coster, R.; Wouters-Ballman, Patricia et al

in Annales de Médecine Vétérinaire (1982), 126

Highly specific antisera were obtained from rabbits immunized with a purified preparation of Bovine Placental Somatomammotropin leading to the development of a sensitive radioimmunoassay. Teh values in ... [more ▼]

Highly specific antisera were obtained from rabbits immunized with a purified preparation of Bovine Placental Somatomammotropin leading to the development of a sensitive radioimmunoassay. Teh values in cotyledons extracts and foetal serum given by this methos are in agreement with those determined by radioreceptor assay using rabbit membranous receptors. Placental somatomammotrophic hormone is always present in pregnant cow sera from day 110 after fertilization but at low concentration (<=2 ng/ml) [less ▲]

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See detailLa resection de la premiere cote dans les syndromes de la traversee thoraco-brachiale. Premiere experience dans 18 cas.
Van de Berg, L; CARLIER, Alain ULg; Huicq, P

in Acta Chirurgica Belgica (1982), 82(6), 523-31

Detailed reference viewed: 5 (2 ULg)
See detailThe dendritic organization of the human spinal cord: the motoneurons.
Schoenen, Jean ULg

in Journal of Comparative Neurology (The) (1982), 211(3), 226-47

The dendritic organization of motoneurons was analyzed with the Golgi stain and a morphometric method in the immature and adult human spinal cord. Each motoneuronal column was found to be characterized by ... [more ▼]

The dendritic organization of motoneurons was analyzed with the Golgi stain and a morphometric method in the immature and adult human spinal cord. Each motoneuronal column was found to be characterized by a specific orientation of dendritic trees and by a distinct pattern of dendritic bundling. Ventromedial motoneurons have a pyramidal dendritic tree with numerous, short longitudinal branches and elongated dorsal branches. The latter form thick bundles oriented toward the ventral gray commissure. Longitudinal dendrites form a narrow-meshed dendritic plexus, containing abundant microbundles. Motoneurons of the ventromedial column have fewer primary dendrites and a lower ramification index than other motoneurons. Central motoneurons are predominantly oriented longitudinally. The meshes of the rostrocaudal dendritic plexus are looser and the microbundles are finer. Most transverse dendrites run laterally and participate in dendritic bundles which penetrate into the ventrolateral funiculus. The rostrocaudal dendritic domain of ventrolateral motoneurons is the largest dendritic domain of all spinal neurons. The longitudinal dendritic network contains fine microbundles and appears wide-meshed. Transverse dendrites form lateral or medial dendritic bundles depending upon the position of their perikaryon. Dorsolateral motoneurons differ from other motoneurons by their multipolar organization with a slight preponderance of dorsoventral dendritic spread. Rudimentary lateral dendrite bundles are restricted to marginal neurons. The longitudinal plexuses of motoneuronal dendrites and the verticotransverse dendrite bundles of the ventromedial column are well developed in the 26-28-week-old fetus. In contrast, the horizontotransverse dendrite bundles of central and ventrolateral motoneurons can only be recognized from 36 weeks on. The possible specific functions of the various types of dendrites bundles are examined and a laminar dendroarchitectonic schema of the human cord is proposed. [less ▲]

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See detailLa sensibilité au stress de deux races porcines belges : le Piétrain et le Landrace belge
Pecquereau, B.; Claustriaux, Jean-Jacques ULg

in Revue de l'Agriculture (1982), 35(6), 3161-3168

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See detailPurification and properties of the exocellular beta-lactamase of Actinomadura strain R39
Duez, Colette ULg; Frère, Jean-Marie ULg; Ghuysen, Jean-Marie ULg et al

in Biochimica et Biophysica Acta - General Subjects (1982), 700

The exocellular beta-lactamase (penicillin amido-beta-lactamhydrolase, EC 3.5.2.6) of Actinomadura R39 consists of one single polypeptide chain of molecular weight about 15 200. It exhibits a highly ... [more ▼]

The exocellular beta-lactamase (penicillin amido-beta-lactamhydrolase, EC 3.5.2.6) of Actinomadura R39 consists of one single polypeptide chain of molecular weight about 15 200. It exhibits a highly asymmetrical shape, has a low isoelectric point (at pH 5.0) and contains about 9.3% (w/w) of a polydeoxyribonucleotide with which it forms a rather stable complex. Removal of a substantial amount of this deoxyribonucleotide by treatment with DNAase I has no effect on the enzyme activity. The beta-lactamase has a wide spectrum of activity. Penicillins and delta 3-cephalosporins can be either good or poor substrates. Oxacillin, which is a poor substrate of most beta-lactamases from Gram-positive bacteria, is a good substrate of the beta-lactamase of Actinomadura R39. Its best substrate, however, is nitrocefin (kcat/Km: 2300 000 M-1.s-1; catalytic centre activity: 210 s-1). The kcat/Km values observed with some penicillins and delta 3-cephalosporins are similar to the values of the bimolecular rate constants that govern the formation of the acyl-enzyme intermediates between these antibiotics and the serine D-alanyl-D-alanine peptidase that is also secreted by the same strain Actinomadura R39. Such a relationship, however, is not observed with all the beta-lactam compounds tested. [less ▲]

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See detailOuverture des châsses des saints Domitien & Mengold au Trésor de Notre-Dame de Huy
George, Philippe ULg; charlier, christine

in Annales du Cercle Hutois des Sciences et Beaux-Arts (1982), XXXVI

Detailed reference viewed: 5 (0 ULg)
See detailLa replantation de 71 doigts totalement amputes.
Lejeune, G; Castermans, A; CARLIER, Alain ULg et al

in Acta Chirurgica Belgica (1982), 82(3), 181-9

Detailed reference viewed: 5 (1 ULg)
See detailEtude dendrométrique du sapin de Douglas
Thill, A.; Palm, Rodolphe ULg

in Notes Techniques du Centre d'Ecologie Forestière et Rurale (1982), 40

Detailed reference viewed: 4 (1 ULg)
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See detailRéapparition de formes graves de la maladie de Newcastle chez le pigeon
Vindevogel, Henri ULg; Pastoret, Paul-Pierre ULg; Thiry, Etienne ULg et al

in Annales de Médecine Vétérinaire (1982), 126

Detailed reference viewed: 13 (2 ULg)
See detailEtude comparative de l'image de la psychologie chez les étudiants en pychologie, belges, espagnols, français, mexicains et québécois
Freixa, i; Bayes, R.; Brédart, Serge ULg et al

in International Journal of Psychology (1982), 17

Detailed reference viewed: 10 (0 ULg)
See detailQuelques aspects d'un cycle annuel du zooplancton en baie de Calvi (Corse)
Dauby, Patrick ULg

in Annales de la Société Royale Zoologique de Belgique (1982), 112

Detailed reference viewed: 6 (2 ULg)
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See detailQuasars in a control field far from bright galaxies
Arp, H.; Surdej, Jean ULg

in Astronomy and Astrophysics (1982), 109

The density of quasars in a control field of the sky selected to be free of bright galaxies is investigated in order to derive a value for the average background density of quasars and to analyze quasar ... [more ▼]

The density of quasars in a control field of the sky selected to be free of bright galaxies is investigated in order to derive a value for the average background density of quasars and to analyze quasar distribution within the field. Schmidt plates were obtained in the ultraviolet and blue for a control field surrounding SAO 45758 at R.A. 15 h 49 min, declination plus 48 deg 38 arcmin. Examination of the spectra of 25 of the 137 objects found to exhibit an ultraviolet excess reveals 12 of them to be quasars, indicating a quasar density of 6.7 plus or minus 0.9/sq deg down to a limiting magnitiude of 20 over the 19 sq deg area of the field. This value is noted to be in agreement with previous values of quasar background density deduced for other regions of the sky. Large fluctuations of quasar density are found, however, within the field which may be correlated with groups of intermediate brightness galaxies. [less ▲]

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See detailAntigens of the basement membrane and the peritumoral stroma in human colonic adenocarcinomas: an immunofluorescence study.
Burtin, P.; Chavanel, G.; Foidart, Jean-Michel ULg et al

in International Journal of Cancer = Journal International du Cancer (1982), 30(1), 13-20

Twenty colonic adenocarcinomas were studied by immunofluorescence with antisera against components of the basement membrane: type IV collagen, laminin and heparan sulfate-rich proteoglycan, as well as ... [more ▼]

Twenty colonic adenocarcinomas were studied by immunofluorescence with antisera against components of the basement membrane: type IV collagen, laminin and heparan sulfate-rich proteoglycan, as well as antisera against antigens of the connective tissue: type-III collagen, fibronectin and hyaluronectin. Marked alterations of the basement membranes were consistently observed on staining with each one of the first three antisera. In contrast, staining of the normal components of connective tissue was in most cases as intense as in normal colonic mucosa. Hyaluronectin, a marker of peritumoral stroma, was found to be present in 12 out 15 tumors studied. [less ▲]

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See detailSpectroscopic observations of thirteen optically-selected QSOs in a large field centred around NGC 5334
Surdej, Jean ULg; Swings, Jean-Pierre ULg; Arp, H. C. et al

in Astronomy and Astrophysics (1982), 114

A large field (approximately 25 sq deg) around NGC 5334 was searched for QSO candidates with ultraviolet-excess, in order to investigate the space density, distribution, and luminosity of quasars near as ... [more ▼]

A large field (approximately 25 sq deg) around NGC 5334 was searched for QSO candidates with ultraviolet-excess, in order to investigate the space density, distribution, and luminosity of quasars near as well as far from bright galaxies. Spectroscopic data obtained with the European Southern Observatory 3.6 m telescope are presented for 13 quasars identified within a sample of 23 observed candidates. As expected, the redshift of these optically selected quasars was found to fall in the range 0.23-2.08, with only one exception. Two, and possibly three, of the quasars of the largest redshift show absorption lines, while the remaining 10 faint blue objects display zero-redshift stellar spectra. [less ▲]

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See detailCritical evaluation of serum uric acid levels in acute myocardial infarction.
Chapelle, Jean-Paul ULg; Albert, A.; Boland, J. et al

in Clinica Chimica Acta (1982), 121(2), 147-57

Serial measurements of serum uric acid were performed on patients suffering from acute myocardial infarction. Nearly 80 percent of the cases demonstrated a fall in uric acid concentrations during the ... [more ▼]

Serial measurements of serum uric acid were performed on patients suffering from acute myocardial infarction. Nearly 80 percent of the cases demonstrated a fall in uric acid concentrations during the first two days of hospitalization and a subsequent return to initial levels within six to eight days. There was a relationship between the decrease in uric acid levels and the serum lactate dehydrogenase activity. No evidence could be found that male patients were hyperuricemic as compared to control subjects. However, female patients between 40 and 60 years of age demonstrated significantly higher uric acid levels than healthy women of corresponding ages, even after adjustment for diuretic use. [less ▲]

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See detailGestion "à la carte" de l'épicéa. Un cas d'espèce : planter à l'écartement de 3 mètres
Delvaux, Jacques; Rondeux, Jacques ULg

in Silva Belgica (1982), 89(1), 17-28

A simulation stand model has been used as an management tool for even-aged stands or management units of spruce (Picea abies Karst) in Belgium. Many simulations based upon numerous thinnings have been ... [more ▼]

A simulation stand model has been used as an management tool for even-aged stands or management units of spruce (Picea abies Karst) in Belgium. Many simulations based upon numerous thinnings have been carried out in order to reach the following objectives fixed by the manager : - the mean girth of trees removed in the first thinning must be as far as possible higher than 40 cm, - the mean girth of the main crop (attained at 50-55 years) must be equal or higher than 100 cm. Those predetermined contraints are possible when starting with trees initially spaced at 3.0 x 3.0 m, and when crown thinnings, with an increasing intensity, are carried out after 40 years. About 20 % of basal area is removed between 40 and 45 years and 13-15 % by every following thinning. The basal area observed after each thinning should be near 31-32 m2 per hectare. [less ▲]

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See detailCerebellar macroneurons in microexplant cell culture: ultrastructural morphology.
NEALE, E. A.; Moonen, Gustave ULg; MACDONALD, R. L. et al

in Neuroscience (1982), 7(8), 1789-90

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See detailQuel avenir pour la loutre en Belgique ?
Libois, Roland ULg; Philippart, Jean Claude; Rosoux, René et al

in Cahiers d'Ethologie (1982), 2(1), 1-15

After de Selys Longchamps (1842), the otter in Belgium was a widespread species along all the full of fish rivers and was regarded as a pest namely in the fishponds of the Campine. This animal becomes ... [more ▼]

After de Selys Longchamps (1842), the otter in Belgium was a widespread species along all the full of fish rivers and was regarded as a pest namely in the fishponds of the Campine. This animal becomes extremely rare now: in Wallony, we only recorded one place where cubs are reared every year. The main reasons for this steep population decrease are well known: i. the otter has been systematically destroyed by hunters, fishermen and trappers who were receiving bounties till 1965 ! ii. the water pollution and the radical changes of the rivers physical characteristics (dredging, straightening and reshaping the river beds or banks) have had disastrous effects on fish, the main food resource of the otter. iii. a lot of previous suitable habitats have been destroyed due to for example draining of swamps and marshes and concreting the river banks. A comprehensive study of the fish populations in Wallony reveals that a small number of streams are still inhabited by relatively undamaged fish communities. Most freshwaters are polluted at different levels, some in a chronic way, others irregularly and many of them have been damaged by hydraulic works so becoming unsuitable for the otters because of a drastic reduction of their fish biomass. In such circumstances it seems likely that we cannot be really optimistic as far as the otter's future in our country is concerned. The last places where otters can still be found today must be inconditionnally protected against every disturbance of whatever type; but those measures will only help if a strong program is undertaken without delay intending to improve the water quality. An educational campaign is also urgently needed. [less ▲]

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See detailHeat transfer phenomena in trickle-bed reactors
Crine, Michel ULg

in Chemical Engineering Communications (1982), 19

Detailed reference viewed: 8 (2 ULg)
See detailA new spore assemblage to correlate between the Breconian (British Isles) and the Gedinnian (Belgium)
Richardson, JB; Streel, Maurice ULg; Hassan, A et al

in Annales de la Société Géologique de Belgique (1982), 105

Detailed reference viewed: 13 (1 ULg)
See detailNoblesse éclairée, bourgeoisie tendre dans la principauté de Liège au XVIIIe siècle
Droixhe, Daniel ULg

in Etudes sur le XVIIIe siècle (1982), 9

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See detailEtude des modifications de l'EEG quantifié et de la VCN au cours de l'inhalation de protoxyde d'azote
Timsit-Berthier, M.; Mantanus, H.; Dethier, D. et al

in Rev EEG neurophysiol (1982), 12

Detailed reference viewed: 16 (2 ULg)
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See detailLa mesure de la hauteur des arbres au moyen d'un clinomètre.
Rondeux, Jacques ULg

in Bulletin de la Société Royale Forestière de Belgique = Tijdschrift van de Koninklijke Belgische Bosbouwmaatschappij (1982), 89(2), 57-62

Mesurer la hauteur d'un arbre avec une précision satisfaisante ne constitue sans doute plus aujourd'hui un problème, eu égard à la qualité des méthodes ou des appareils susceptibles d'être utilisés. Ces ... [more ▼]

Mesurer la hauteur d'un arbre avec une précision satisfaisante ne constitue sans doute plus aujourd'hui un problème, eu égard à la qualité des méthodes ou des appareils susceptibles d'être utilisés. Ces appareils, appelés "dendromètres", mettent en oeuvre des principes géométriques (triangles semblables) ou des principes trigonométriques (mesure de pentes). Parmi les premiers, on peut citer la célèbre planchette dendrométrique et le dendromètre de Franck, bien connu de nombreux forestiers belges. Parmi les seconds, on relève les dendromètres Blume-Leiss et Suunto (Dagnelie et al., 1977 ; Rondeux, 1978), conçus pour travailler avec une beaucoup plus grande précision mais malheureusement encore très peu utilisés chez nous. Cette situation est, selon toute vraisemblance, liée à un manque d'informations et à l'absence d'uniformité dans les méthodes de cubage généralement utilisées pour lesquelles nombre de forestiers se contentent d'une estimation rapide ("à l'oeil") de la hauteur, le plus souvent "marchande". L'utilisation de tarifs de cubage s'appuyant sur la connaissance de la grosseur et de la hauteur totale des arbres ou d'un critère de qualité des peuplements telle que la hauteur dominante (Dagnelie et al., 1976, 1977) nécessite cependant une estimation plus rigoureuse des hauteurs, étant donné que ces dernières concernent souvent un nombre limité d'arbres. Dans cette perspective, à défaut de disposer de dendromètres sophistiqués et relativement coûteux, l'utilisation d'un clinomètre nous paraît recommandable. Cet appareil, destiné à mesurer des angles (pentes) réalise, en effet, à de nombreux égards, un compromis intéressant en matière de coût, de commodité d'utilisation et de précision. Il peut en outre s'avérer plus efficace que les dendromètres actuels ou les suppléer pour résoudre divers problèmes de mesure inhérents aux conditions parfois difficiles de travail en forêt. [less ▲]

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See detailAtlas provisoire des mammifères sauvages de Wallonie: distribution, ecologie, ethologie, conservation
Libois, Roland ULg

in Cahiers d'Ethologie (1982), 2(suppl. 1-2), 1-207

Methods, status of the wild mammals, threatened species: hedghog, bagder, otter, pine marten, stone marten, beaver, common dormouse, edible dormouse, hamster, hare, wildboar, red deer, fallow deer ... [more ▼]

Methods, status of the wild mammals, threatened species: hedghog, bagder, otter, pine marten, stone marten, beaver, common dormouse, edible dormouse, hamster, hare, wildboar, red deer, fallow deer. Problems: hunting, habitat alteration, pollution... Solutions: better legislation, habitat restoration, education... [less ▲]

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See detailEffect of trazodone on the firing rate of central monoaminergic neurons
Scuvée-Moreau, Jacqueline ULg; Dresse, Albert ULg

in Archives Internationales de Pharmacodynamie et de Thérapie (1982), 260

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See detailA Dissociative Electroionization Study of Nitrous Oxide. The NO+ and N2+ Dissociation Channels.
Olivier, J. L.; Locht, Robert ULg; Momigny, J.

in Chemical Physics (1982), 68

The decay of N2O into NO+ and N2+ dissociation channels has been investigated by electron impact using ions kinetic energy and mass analysis. The appearance energies of NO+ and N2+ are measured as a ... [more ▼]

The decay of N2O into NO+ and N2+ dissociation channels has been investigated by electron impact using ions kinetic energy and mass analysis. The appearance energies of NO+ and N2+ are measured as a function of the released translational energy. Both decay channels are mainly reached through predissociation of the N2O+ ionic states. In the NO+ decay channel, only one dissociation limit is involved, i.e. NO+(X1Sigma+,v)+N(4S) and hence the repulsive 4Sigma- state is responsible for all the observed phenomena. In the N2+ decay channel, several dissociation limits are involved. Dissociative ionization involving doubly excited states of N2O+ in both dissociation channels are briefly discussed. [less ▲]

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See detailEffect of amineptine on the firing rate of central monoaminergic neurons in the rat
Scuvée-Moreau, Jacqueline ULg; Dresse, Albert ULg

in Archives Internationales de Physiologie et de Biochimie (1982), 90

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