References of "1974"
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See detailHandicapped or different ? Symposium conclusions
De Landsheere, Gilbert ULg

in Information Bulletin (1974, April), 1

This summary paper of the Educational Research Symposium on the "Socio-Culturally Handicapped" details the major themes of the conference, and lists recommendations for further involvement for the Council ... [more ▼]

This summary paper of the Educational Research Symposium on the "Socio-Culturally Handicapped" details the major themes of the conference, and lists recommendations for further involvement for the Council of Europe in this area. (EH) [less ▲]

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See detailSensitivity to ampicillin and cephalothin of enzymes involved in wall peptide crosslinking in Escherichia coli K12, strain 44
Nguyen-Distèche, Martine ULg; Pollock, Jerry J.; Ghuysen, Jean-Marie ULg et al

in European Journal of Biochemistry (1974), 41(3), 457-463

After extraction of the membranes of Escherichia coli K12 strain 44 by Brij-36T, each of the four enzyme activities (natural transpeptidase, unnatural transpeptidase, carboxypeptidase and endopeptidase ... [more ▼]

After extraction of the membranes of Escherichia coli K12 strain 44 by Brij-36T, each of the four enzyme activities (natural transpeptidase, unnatural transpeptidase, carboxypeptidase and endopeptidase) of the wall peptide crosslinking system, occurs in two forms characterized by large differences in their sensitivity to ampicillin (but much smaller differences in their sensitivity to cephalothin). The fractionation of the enzyme activities into two groups of low and high sensitivity to ampicillin is achieved essentially by chromatography of the membrane extract on DEAE-cellulose. [less ▲]

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See detailEnzymes involved in wall peptide crosslinking in Escherichia coli K12, strain 44
Nguyen-Distèche, Martine ULg; Ghuysen, Jean-Marie ULg; Pollock, Jerry J. et al

in European Journal of Biochemistry (1974), 41(3), 447-455

By using the glutamate-amidated tetrapeptide l-alanyl-d-isoglutaminyl-(l)-meso-diamino-pimelyl-(l)-d-alanine as a probe, there appears to exist in the membranes of Escherichia coli K12 strain 44 a dd ... [more ▼]

By using the glutamate-amidated tetrapeptide l-alanyl-d-isoglutaminyl-(l)-meso-diamino-pimelyl-(l)-d-alanine as a probe, there appears to exist in the membranes of Escherichia coli K12 strain 44 a dd-carboxypoptidase-transpeptidase system which does not recognize this peptide and a dd-carboxypoptidase-transpeptidase system which recognizes it. The dd-carboxypeptidase-endopeptidase system is essentially hydrolytic. It catalyzes the hydrolysis of UDP-N-acetyl-muramyl-pentapeptide into UDP-N-acetylmuramyl-tetrapeptide and the hydrolysis of the wall peptidoglycan peptide dimer into monomers. These activities are not inhibited by the glutamate-amidated tetrapeptide. The system may consist either of two enzyme proteins having predominantly carboxypeptidase activity and endopeptidase activity, respectively, or of one enzyme protein of which the functioning would depend upon the environmental conditions. The dd-carboxypeptidase-transpeptidase system (a) catalyzes concomitant hydrolysis (carboxypeptidase activity) and transfer (natural model transpeptidase activity) reactions with the pentapeptide l-alanyl-γ-d-glutamyl-(l)-meso-diaminopimelyl-(l)-d-alanyl-d-alanine. The transfer reaction leads to the synthesis of a dimer that is identical to the one which occurs in the E. coli wall peptidoglycan; (b) utilizes the glutamate-amidated tetrapeptide as an acceptor. Simultaneous exposure of the pentapeptide and the glutamate-amidated tetrapeptide to the enzyme system leads to the formation of an hybrid monoamidated peptide dimer and causes a decreased hydrolysis of the pentapeptide; (c) by virtue of its own carboxypeptidase activity, it appears to exert some endopeptidase activity. Both carboxypeptidase and endopeptidase activities of this system are inhibited by the glutamate-amidated tetrapeptide, but this represents only a small fraction of the total hydrolytic activity of the membrane Brij-36T extract. (d) The system catalyzes an unnatural model transpeptidation reaction in which glycine replaces d-alanine at the C-terminal position of the nucleotide UDP-N-acetylmuramyl-pentapeptide. This system may also consist either of two enzyme proteins having predominantly natural model transpeptidase activity and unnatural model transpeptidase activity, respectively, or of one enzyme protein of which the functioning would depend upon the environmental conditions. Whatever the exact situation, the E. colidd-carboxypeptidase-transpeptidase system is in many respects, similar to the dd-carboxy-peptidase-transpeptidase single polypeptide enzymes isolated from Streptomyces strains R39 and R61. [less ▲]

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See detailL'ordinateur au service de la gestion forestière : un cas pratique
Rondeux, Jacques ULg

in Bulletin de la Société Royale Forestière de Belgique = Tijdschrift van de Koninklijke Belgische Bosbouwmaatschappij (1974), 81(2), 117-134

On the basis of a forest data bank consisting in different files and having a great number of informations dealing with qualitative and quantitative stands descriptions, the computer is able to make up ... [more ▼]

On the basis of a forest data bank consisting in different files and having a great number of informations dealing with qualitative and quantitative stands descriptions, the computer is able to make up quicker various problems useful to the forest management (synthesis of informations per management units, repartition of forest areas per species, per age, simulation of cutting sections distribution, and so on). The informations are collected by permanent forest divisions. It is then possible to bring the recorded datas up to date and even the results of their treatment. Everything that we present in this paper can be realized at different levels of a forest organization and for several owners. The possibilities of this system can also be applied to other problems as inventories. [less ▲]

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See detailEvaluation des effets psychologiques du Noveril simple et du Noveril TR
Mormont, Christian ULg

in Psychopharmacologia (1974), 37(4), 365-370

Rated 2 groups of depressed inpatients (9 and 11 Ss) before, during, and after the study on 2 depression scales (Hamilton, Breulet), an anxiety scale (Cattell), and the MMPI. The Mann-Whitney U test was ... [more ▼]

Rated 2 groups of depressed inpatients (9 and 11 Ss) before, during, and after the study on 2 depression scales (Hamilton, Breulet), an anxiety scale (Cattell), and the MMPI. The Mann-Whitney U test was used to analyze statistically the results of the double-blind, cross-over, and randomized evaluation of the antidepressant characteristics of ordinary and of time-released Noveril (dibenzepin). Results confirm that both forms of Noveril are antidepressant, but that ordinary Noveril is more active. [less ▲]

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See detailVibrations asymétriques d'une coque de révolution autour d'un état d'équilibre thermo-élastique
Debongnie, Jean-François ULg; Huck, André; Mol, André et al

Report (1974)

This paper describes a theory of shells of revolution. Staring with geometrical considerations, the expression of the strains is deduced. A particular form of the displacement field is then chosen, from ... [more ▼]

This paper describes a theory of shells of revolution. Staring with geometrical considerations, the expression of the strains is deduced. A particular form of the displacement field is then chosen, from which follow the shell strains and changes of curvature. The equilibrium equations are then deduced from a variational point of view. Constitutive equations are then stated and simplified owing to the powers of the parameter h/R. The problem of vibrations round an equilibrium state is then formulated, including the so-called stability terms.Inertia terms are then developed. IN order to treat asymmetrical vibrations, a Fourier development of the displacements is introduced, which allows a clear separation of the eigenmodes. [less ▲]

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See detailQuelques réflexions relatives à l'utilisation des tarifs de cubage
Rondeux, Jacques ULg

in Bulletin de la propriété privée (1974), 6(21), 23-25

L'estimation du volume des peuplements forestiers, qu'il s'agisse d'éclaircies ou de matériel sur pied, peut être réalisée au moyen de tarifs de cubage. Ceux-ci sont des tableaux ou des relations ... [more ▼]

L'estimation du volume des peuplements forestiers, qu'il s'agisse d'éclaircies ou de matériel sur pied, peut être réalisée au moyen de tarifs de cubage. Ceux-ci sont des tableaux ou des relations mathématiques fournissant des volumes moyens d'arbres en fonction d'une ou de plusieurs caractéristiques dendrométriques telles que la grosseur, la hauteur, le défilement, etc... [less ▲]

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See detailEffects of procaine and d-tubocurarine on the activity of membrane bound acetylcholinesterase
Foidart, Jean-Michel ULg; Gridelet, J.

in Biochemical Pharmacology (1974), 23

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See detailBinding of beta-lactam antibiotics to the exocellular DD-carboxypeptidase-transpeptidase of Streptomyces R39
Frère, Jean-Marie ULg; Ghuysen, Jean-Marie ULg; Reynolds, Peter E. et al

in Biochemical Journal (1974), 143(1), 241-249

Benzylpenicillin and cephaloridine reacted with the exocellular dd-carboxypeptidase-transpeptidase from Streptomyces R39 to form equimolar and inactive antibiotic-enzyme complexes. At saturation, the ... [more ▼]

Benzylpenicillin and cephaloridine reacted with the exocellular dd-carboxypeptidase-transpeptidase from Streptomyces R39 to form equimolar and inactive antibiotic-enzyme complexes. At saturation, the molar ratio of chromogenic cephalosporin 87-312 to enzyme was 1.3:1, but this discrepancy might be due to a lack of accuracy in the measurement of the antibiotic. Spectrophotometric studies showed that binding of cephaloridine and cephalosporin 87-312 to the enzyme caused opening of their beta-lactam rings. Benzylpenicillin and cephalosporin 87-312 competed for the same site on the free enzyme, suggesting that binding of benzylpenicillin also resulted in the opening of its beta-lactam ring. In Tris-NaCl-MgCl(2) buffer at pH7.7 and 37 degrees C, the rate constants for the dissociation of the antibiotic-enzyme complexes were 2.8x10(-6), 1.5x10(-6) and 0.63x10(-6)s(-1) (half-lives 70, 130 and 300h) for benzylpenicillin, cephalosporin 87-312 and cephaloridine respectively. During the process, the protein underwent reactivation. The enzyme that was regenerated from its complex with benzylpenicillin was as sensitive to fresh benzylpenicillin as the native enzyme. With [(14)C]benzylpenicillin, the released radioactive compound was neither benzylpenicillin nor benzylpenicilloic acid. The Streptomyces R39 enzyme thus behaved as a beta-lactam-antibiotic-destroying enzyme but did not function as a beta-lactamase. Incubation at 37 degrees C in 0.01m-phosphate buffer, pH7.0, and in the same buffer supplemented with sodium dodecyl sulphate caused a more rapid reversion of the [(14)C]benzylpenicillin-enzyme complex. The rate constants were 1.6x10(-5)s(-1) and 0.8x10(-4)s(-1) respectively. Under these conditions, however, there was no concomitant reactivation of the enzyme and the released radioactive compound(s) appeared not to be the same as before. The Streptomyces R39 enzyme and the exocellular dd-carboxypeptidase-transpeptidase from Streptomyces R61 appeared to differ from each other with regard to the topography of their penicillin-binding site. [less ▲]

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See detailFractionation of the DD-carboxypeptidase-transpeptidase activities solubilized from membranes of Escherichia coli K12, strain 44
Pollock, Jerry J.; Nguyen-Disteche, Martine; Ghuysen, Jean-Marie ULg et al

in European Journal of Biochemistry (1974), 41(3), 439-446

A transpeptidase activity in Escherichia coli was measured independently of other enzymes involved in peptidoglycan synthesis by quantitating the formation of UDP-N-acetylmuramyl-l-alanyl-y-d-glutamyl-(l ... [more ▼]

A transpeptidase activity in Escherichia coli was measured independently of other enzymes involved in peptidoglycan synthesis by quantitating the formation of UDP-N-acetylmuramyl-l-alanyl-y-d-glutamyl-(l)-meso-diaminopimelyl-(l)-d-alanyl-[14C]glycine when UDP-N-acetylmuramyl-l-alanyl-y-d-glutamyl-(l)-meso-diaminopimelyl-(l-d-alanyl-d-alanine was used as donor substrate and [14C]glycine as acceptor in a transfer reaction. After extraction of membrane envelopes with Brij-36T and subsequent ammonium sulfate precipitation, DEAE-cellulose chromatography revealed two major fractions; one not adsorbed to the ion-exchange resin and the other adsorbed. The fraction which was bound to DEAE-cellulose was bound to and could be eluted from an ampicillin affinity chromatography system while the fraction not bound to DEAE-cellulose was also not bound to the ampicillin column. Both unbound and bound ampicillin fractions exhibited dd-carboxypeptidase and transpeptidase activities although for equivalent dd-carboxypeptidase activity, the bound ampicillin fraction required about five times more glycine acceptor to achieve the same amount of transpeptidation as the unbound ampicillin fraction. [less ▲]

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See detailConstituants chimiques des feuilles d'Anthocleista vogelii
Chapelle, Jean-Paul ULg

in Planta Medica (1974), 26(4), 301-4

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See detailQuand j'entends le mot "éducation"
Martin, Bernadette ULg

in Education : tribune libre d'information et de discussion pédagogiques (1974), 149

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See detailContribution to the study of Strychnos usambarensis GILG, main ingredient of an African curarizing arrow poison
Angenot, Luc ULg

in Dissertation Abstracts (1974), 34(11), 338

The thesis is subdivided in four parts and two annexes . the first part concerns the choice of Strychnos usambarensis based on ethnobotanical considerations; the second part is dedicated to the study of ... [more ▼]

The thesis is subdivided in four parts and two annexes . the first part concerns the choice of Strychnos usambarensis based on ethnobotanical considerations; the second part is dedicated to the study of arrow poisons in the World and particularly in Africa; the third part describes the isolation of eight indole alkaoids ( 5 new and 3 known ones) and their structure determination thanks to modern spectroscopic methods.The fourth part is applied to the biosynthesis of these alkaloids and to the identification of loganic acid.The first appendix describes the phytochemical screening of 33 Rwandan plants mainly collected in the National Park of Akagera. The second appendix relates pharmacological experiments on crude fractions and some isolated alkaloids. [less ▲]

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See detailDiffusivité de l'eau dans un milieu non saturé hétérogène
Debouche, Charles ULg; Dautrebande, Sylvia; Sine, Léopold

in Journal of Hydrology (1974), 22

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See detailOutillage et vocabulaire dialectal de la dentellière à Aye
Droixhe, Daniel ULg

in Enquêtes du Musée de la Vie wallonne (1974), 13

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See detailLes grands centres commerciaux en Belgique. Etude comparative
Merenne-Schoumaker, Bernadette ULg

in Bulletin de la Société Géographique de Liège (1974), (10), 13-38

Comparative study of the first seven shopping centers in Belgium: Ring, Westland, Woluwe, Cora City, Waasland, Genk and Batta

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See detailVariational Principles and the patch test
Fraeijs de Veubeke, Baudouin ULg

in International Journal for Numerical Methods in Engineering (1974), 8

The patch test is shown to be contained in the variational formulations of the finite element methods at the assembling level, all of which require the vanishing of the virtual work of interface connexion ... [more ▼]

The patch test is shown to be contained in the variational formulations of the finite element methods at the assembling level, all of which require the vanishing of the virtual work of interface connexion loads. By a systematic introduction of stress generating functions, attention is drawn to the fact that any given finite element model can be assembled in two different ways: either by identiification of a set of boundary displacements (leading to the direct stiffness method), or by identification of a set of local stress function values (leading to the dual direct flexibility method). Looking at any conjugate couple (generalized displacement - generalized surface traction) at an interface, one is strongly transmitted, the other weakly. Discretization of the zero virtual work condition at an interface of plate bending models, by means of Legendre polynomials expansions, allows q systematic construction of so-called "non-conforming" elements that pass the patch test. They are in fact identified with weakly conforming, but strongly diffusive , htbrids, and the lowest degree element (quadratic) is in fact the Morley constant-moment element. Examples are given for higher displacement fields. The case of plate stretching elements can be handles by duality, the difficulties being here associated with the requirements for diffusivity. Non diffusive elements that pass the zero interface virtual worktest can be constructed systematically and are identifiable with weakly diffusive, but strongly conforming, hybrids, of the type first proposed by T.H.H. Pian. [less ▲]

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See detailLes valeurs de référence en chimie clinique. Problèmes de méthodologie et résultats préliminaires
Heusghem, C.; Buret, J.; Delwaide, P. A. et al

in Revue de Médecine de Tours (1974), (8), 82-107

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See detailMéthodes d'évaluation et analyse des résultats à propos d'un essai clinique du Noveril simple et du Noveril TR
Mormont, Christian ULg

in Psychologie Médicale (1974), 6(5), 1021-1031

"Ordinary" Noveril was compared with timed-release Noveril in a 6-wk double-blind crossover trial. Ss were divided into 2 groups--one with 11 depressed patients and the other with 9 depressed patients ... [more ▼]

"Ordinary" Noveril was compared with timed-release Noveril in a 6-wk double-blind crossover trial. Ss were divided into 2 groups--one with 11 depressed patients and the other with 9 depressed patients--and were evaluated by the Hamilton Rating Scale for depression, the Breulet Depression Scale, the Cattell Anxiety Scale, and the MMPI. There were no significant differences between groups at the beginning of treatment. At the end of 3 wks, both groups had improved, but Ss on "ordinary" Noveril improved more. Some of the effects gained at the end of 3 wks were lost at the end of 6 wks in both groups. It is concluded that both forms of Noveril possess antidepressant activity, but that the "ordinary" form is more potent than the timed-release form. (English summary) (PsycINFO Database Record (c) 2012 APA, all rights reserved) [less ▲]

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