References of "1977"
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See detailPhotometric Variations of the B6 Star HR 3440
Renson, Pierre ULg; Sterken, C.

in Information Bulletin on Variable Stars (1977), 1373

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See detailConception d'un système d'analyse AUGER. Application à l'étude du verre.
Nicolas, Jacques ULg

Doctoral thesis (1977)

Un système de spectroscopie Auger basé sur un analyseur hémisphérique et balayage des énergies électroniques de 0 à 3000 eV a été construit et testé. Outre l'appareil de mesure proprement-dit, le ... [more ▼]

Un système de spectroscopie Auger basé sur un analyseur hémisphérique et balayage des énergies électroniques de 0 à 3000 eV a été construit et testé. Outre l'appareil de mesure proprement-dit, le développement a porté sur la construction d'une enceinte de travail, avec porte-échatillon et passages électriques pouvant supporter un vide extrêmement poussé (de l'ordre du nano-Pascal). L'appareil a été appliqué à l'étude d'échantillons de verre, afin de mieux comprendre les phénomènes de vieillissement du verre en atmosphère humide et l'adhérence de l'étain pour la fabrication de miroirs. L'originalité de la thèse est d'avoir pu identifier un certain nombre de conditions opératoires optimales, de manière à pouvoir travailler avec le verre, matériau isolant électrique. En effet, la spectroscopie des électrons Auger est basée sur le bombardement de l'échantillon par un faisceau d'électrons, qui s'accumulent dans le matériau isolant et font fortement dériver les pics de rétro-diffusion. [less ▲]

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See detailA propos de l'éclaircie systématique
Boudru, Marc; Rondeux, Jacques ULg

in Bulletin de la Société Royale Forestière de Belgique = Tijdschrift van de Koninklijke Belgische Bosbouwmaatschappij (1977), 84ème année(n° 6), 339-345

Line or strip thinnings are more and more considered as means of reducing costs of first thinnings in closely spaced stabds. The results of experiments abroad and observations, made by the writers in ... [more ▼]

Line or strip thinnings are more and more considered as means of reducing costs of first thinnings in closely spaced stabds. The results of experiments abroad and observations, made by the writers in stands of Norway spruce in the Ardennes, indicate that the removal of one line in four, together with selective thinning in the areas between, gives the best compromise between the risk of damage and the saving which can be obtained by such a method. [less ▲]

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See detailComparaison des méthodes de dosage des isoenzymes de la CK
Chapelle, Jean-Paul ULg

Conference (1977, November 16)

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See detailThe peptidoglycan crosslinking enzyme system in Streptomyces R61, K15 and rimosus. Immunological studies
Nguyen-Distèche, Martine ULg; Frère, Jean-Marie ULg; Dusart, Jean et al

in European Journal of Biochemistry (1977), 81(1), 29-32

The exocellular DD-carboxypeptidases from Streptomyces R61, K 15, the lysozyme-releasable DD-carboxypeptidases from Streptomyces R61, K15 and rimosus, and the membrane-bound DD-carboxypeptidase of ... [more ▼]

The exocellular DD-carboxypeptidases from Streptomyces R61, K 15, the lysozyme-releasable DD-carboxypeptidases from Streptomyces R61, K15 and rimosus, and the membrane-bound DD-carboxypeptidase of Streptomyces K15 are immunologically related to each other. [less ▲]

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See detailThe peptidoglycan crosslinking enzyme system in Streptomyces strains R61, K15 and rimosus : Kinetic Coefficients Involved in the Interactions of the Membrane-Bound Transpeptidase with Peptide Substrates and β-Lactam Antibiotics
Dusart, Jean; Leyh-Bouille, Mélina; Ghuysen, Jean-Marie ULg

in European Journal of Biochemistry (1977), 81(1), 33-44

The transpeptidation reaction performed by the membranes of Streptomyces strain R61 fits the general rate equation for an enzyme-catalysed bimolecular reaction. The same membranes (E) interact with beta ... [more ▼]

The transpeptidation reaction performed by the membranes of Streptomyces strain R61 fits the general rate equation for an enzyme-catalysed bimolecular reaction. The same membranes (E) interact with beta-lactams (I) to form inactive penicillin-enzyme-membrane complexes (EI) of rather high stability, which subsequently break down (E + I leads to EI leads to E + degradation products). The enzyme is regenerated and the antibiotic is released in the form of an inactive metabolite. With benzylpenicillin, the degradation product is benzylpenicilloic acid. The reaction is heat-labile. The first step of the reaction (E + I leads to EI) is characterized by a second-order rate constant (kformation in M-1 s-1) and the second step (EI leads to E + degradation products) by a first-order rate constant (kbreakdown in s-1). The effects in vitro of various beta-lactams on the membrane-bound transpeptidase, as expressed by the relevant kformation and kbreakdown values, parallel the effects in vivo of the same antibiotics as expressed by their ability to prevent the germination and growth of conidiospores. The kinetic parameters of the transpeptidase that was solubilized with N-cetyl-N,N,N-trimethylammonium bromide with respect to its interaction with both peptide substrates and beta-lactam antibiotics are quantitatively different from those of the membrane-bound enzyme. Moreover, the solubilized enzyme fragments benzylpenicillin with formation of phenylacetylglycine, a reaction which is similar to that catalysed by the exocellular R61 enzyme. The membranes of Streptomyces strains rimosus and K15 possess an active 'classic' penicillinase. They were not studied but the kinetic coefficients of the corresponding solubilized transpeptidases were determined and compared with those of the solubilized enzyme from strain R61. [less ▲]

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See detailOn the evolution of an H II region and the structure of its ionization fronts
Manfroid, Jean ULg

in Astronomy and Astrophysics (1977), 61

Abstract image available at: http://cdsads.u-strasbg.fr/abs/1977A&A....61..437M

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See detailThe translation kernel in the n-dimensional scattering problem
Coz, Marcel; Rochus, Pierre ULg

in Journal of Mathematical Physics (1977), 18

Radial wavefunctions are defined for the n-dimensional scattering problem (n>~1) with spherical symmetry by conditions of regularity at the origin or by conditions of behavior at infinity. The existence ... [more ▼]

Radial wavefunctions are defined for the n-dimensional scattering problem (n>~1) with spherical symmetry by conditions of regularity at the origin or by conditions of behavior at infinity. The existence of translation kernels can therefore be discussed in both instances. The problem of representing regular solutions appears to be essentially different from that of representing irregular solutions. The essential difference originates from the type of domain used in the representation: It is bounded in the first case and unbounded in the second. If one can still compare the ranges of validity of the two types of representation when one is dealing with a scalar situation, upon proceeding to a matrix situation, a comparison is no longer possible. [less ▲]

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See detailHet dialect van Tilburg
Vromans, Joseph ULg

Conference given outside the academic context (1977)

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See detailEléments de pronostic dans l'infarctus du myocarde au stade aigu
Chapelle, Jean-Paul ULg; Albert, Adelin ULg; Demoulin, J. C. et al

Conference (1977, October 08)

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See detailExclusive objectivité ou Du discours scientifique à l'école
Dumortier, Jean-Louis ULg

in Revue de la Direction Générale de l’Organisation des Etudes (1977)

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See detailRotation period and photoelectric lightcurves of Asteroid 471 Papagena
Surdej, Anna ULg; Surdej, Jean ULg

in Astronomy and Astrophysics. Supplement Series (1977), 30

Asteroid 471 Papagena was observed during the 1976 opposition with a photoelectric photometer attached to the 61-cm Bochum telescope at the European Southern Observatory. The light curve shows a very ... [more ▼]

Asteroid 471 Papagena was observed during the 1976 opposition with a photoelectric photometer attached to the 61-cm Bochum telescope at the European Southern Observatory. The light curve shows a very unusual triple maximum and minimum. The synodic period found is 7 hr 9 min 23 plus or minus 19 sec and the maximum amplitude of the light curve is 0.13 magnitude. [less ▲]

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See detailHENRY GRAY portrait/interview
Sacré, Robert ULg

Article for general public (1977)

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See detailEvolution du taux de cortisol plasmatique chez le veau de la naissance à l'âge de 14 jours
Massip, Alban; Wouters-Ballman, Patricia; Beckers, Jean-François ULg et al

in Comptes Rendus de l'Académie des Sciences de Paris (1977), 285

Plasma cortisol was recorded in 15 calves from birth to 14 days of age by a radioimmunoassay technique. At birth mean cortisol value is 67.3 ng/ml; 6 hours later it decreases by 58.4% then it gradually ... [more ▼]

Plasma cortisol was recorded in 15 calves from birth to 14 days of age by a radioimmunoassay technique. At birth mean cortisol value is 67.3 ng/ml; 6 hours later it decreases by 58.4% then it gradually diminishes and about 14 days after, it reaches adult levels (5.1 ng/ml). [less ▲]

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See detailIntroduction du calcul des vitesses critiques dans DYNAM
Debongnie, Jean-François ULg; Géradin, Michel ULg

Report (1977)

The computation of critical speeds has been introduced in the DYNAM software, in all axisymmetrical elements. This report describes the adopted formulation and presents some application cases.

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See detailA new look at Herrmann's formulation of incompressibility
Debongnie, Jean-François ULg

in Wellford, L.; Carter, Jr. (Eds.) Proceedings of the symposium on applications of computer methods in engineering (vol.2) (1977, August)

An exposition of Herrmann's formulation is given first, and its extension to the anisotropic case is presented following a new way. Using this method, the matrix of material coefficients can be calculated ... [more ▼]

An exposition of Herrmann's formulation is given first, and its extension to the anisotropic case is presented following a new way. Using this method, the matrix of material coefficients can be calculated in a fully automated manner. The existence of the solution is briefly discussed next. A necessary and sufficient condition is obtained which turns to be of unpratical use. Fortunately, this condition is in most practical cases equivalent to another one, which is of fairly simple use. These concepts are illustrated by an example. [less ▲]

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See detailThe concept of the penicillin target from 1965 until today. The thirteenth marjory stephenson memorial lecture
Ghuysen, Jean-Marie ULg

in Journal of General Microbiology (1977, July 01), 101(1), 13-33

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See detailCorrection à l'IBVS No 1280
Renson, Pierre ULg

in Information Bulletin on Variable Stars (1977), 1300

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See detailSome effects of shocks in H II regions
Manfroid, Jean ULg

in Astronomy and Astrophysics (1977), 58

Some possible effects of strong shocks traveling through an H II region are investigated using a theoretical model of an H II region around an O6 star in a uniform medium. The diffuse radiation field ... [more ▼]

Some possible effects of strong shocks traveling through an H II region are investigated using a theoretical model of an H II region around an O6 star in a uniform medium. The diffuse radiation field produced by H, He, and He(+) is taken into account along with collisional ionization. An expansion velocity of 200 km/s is introduced in the central parts of the model nebula to produce a shocked shell, and the subsequent hydrodynamic evolution of the nebula is followed. The results show that a modest increase in shell density can trigger recombination processes in the outer regions of the nebula. [less ▲]

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