Publications ORBi OA
Bookmark and Share    
Full Text
Peer Reviewed
See detailComment j'explore ... une myopathie par biopsie musculaire
Deprez, Manuel ULg

in Revue Médicale de Liège (2001), 56(1), 49-52

Muscle biopsy is a valuable tool in the diagnosis of many neuromuscular disorders. It is an invasive investigation that will be considered after careful clinical examination, supplemented by biological ... [more ▼]

Muscle biopsy is a valuable tool in the diagnosis of many neuromuscular disorders. It is an invasive investigation that will be considered after careful clinical examination, supplemented by biological and electrophysiological studies. The biopsy procedure and the subsequent processing of specimen in the laboratory significantly influence the information provided by the microscopic examination of muscle tissue. They are reviewed in details in this article. Close collaboration between clinicians and neuropathologists in the setting of an optimized procedure will further increase the diagnostic yield of muscle biopsy. [less ▲]

Detailed reference viewed: 39 (5 ULg)
Full Text
See detailLa photographie à Liège au XIXe siècle. Une modernité ambivalente
Mélon, Marc-Emmanuel ULg

in Duchesne, Jean-Patrick (Ed.) Vers la modernité. Le XIXe siècle au Pays de Liège (2001)

Detailed reference viewed: 38 (3 ULg)
Full Text
Peer Reviewed
See detailAdaptive significance of facultative paedomorphosis in Triturus alpestris (Amphibia, Caudata): resource partitioning in an alpine lake
Denoël, Mathieu ULg; Joly, Pierre

in Freshwater Biology (2001), 46(10), 1387-1396

1. Facultative paedomorphosis is a polymorphism that has important evolutionary implications in promoting morphological differentiation and variation in habitat use. It occurs in several urodele species ... [more ▼]

1. Facultative paedomorphosis is a polymorphism that has important evolutionary implications in promoting morphological differentiation and variation in habitat use. It occurs in several urodele species throughout the world. Several hypotheses based on life-history theory have been proposed to explain the wide range of habitats in which facultative paedomorphosis occurs, suggesting multifactorial causes. 2. In harsh habitats, such as mountain lakes, paedomorphosis might promote niche partitioning between morphs. This hypothesis was tested by comparing micro-habitat use and diet of two coexisting morphs in an alpine lake. 3. Paedomorphs occupied all microhabitats in the lake while metamorphs occurred only along the shoreline or at the water surface. Paedomorphic newts were frequent in deep water, where they foraged mainly on plankton. Plankton was poorly exploited by metamorphic newts, which fed mainly on terrestrial insects. Difference between morphs in microhabitat use, and consequently in the diet, were consistent in both sexes and in juveniles. 4. In adults, the mass and energy value of stomach contents did not differ between morphs, suggesting a similar food availability in the habitats occupied. 5. This study indicates habitat partitioning between morphs involving dietary differences. Specific benefits and costs of each ontogenetic pathway may allow their coexistence in this deep and fishless lake. Paedomorphosis benefits individual newts by making new food resources available and presumably reducing competition at the shore of the lake. However, the proximate causes of such an ontogenetic switch remain unclear. [less ▲]

Detailed reference viewed: 160 (13 ULg)
Full Text
Peer Reviewed
See detailTopically applied vitamin C enhances the mRNA level of collagens I and III, their processing enzymes and tissue inhibitor of matrix metalloproteinase 1 in the human dermis.
Nusgens, Betty ULg; Humbert, Philippe; Rougier, André et al

in Journal of Investigative Dermatology (2001), 116(6), 853-9

Ascorbic acid (vitamin C) is a cofactor required for the function of several hydroxylases and monooxygenases. It is not synthesized in humans and some other animal species and has to be provided by diet ... [more ▼]

Ascorbic acid (vitamin C) is a cofactor required for the function of several hydroxylases and monooxygenases. It is not synthesized in humans and some other animal species and has to be provided by diet or pharmacologic means. Its absence is responsible for scurvy, a condition related in its initial phases to a defective synthesis of collagen by the reduced function of prolylhydroxylase and production of collagen polypeptides lacking hydroxyproline, therefore, they are unable to assemble into stable triple-helical collagen molecules. In fibroblast cultures, vitamin C also stimulates collagen production by increasing the steady-state level of mRNA of collagen types I and III through enhanced transcription and prolonged half-life of the transcripts. The aim of the experimental work has been to evaluate the effect on dermal cells of a preparation of vitamin C topically applied on one side vs placebo on the other side of the dorsal face of the upper forearm of postmenopausal women. Biopsies were collected on both sides and the level of mRNA measured by non competitive reverse transcription-polymerase chain reaction made quantitative by the simultaneous transcription and amplification of synthetic RNA used as internal standards. The mRNA of collagen type I and type III were increased to a similar extent by vitamin C and that of three post-translational enzymes, the carboxy- and amino-procollagen proteinases and lysyloxidase similarly increased. The mRNA of decorin was also stimulated, but elastin, and fibrillin 1 and 2 were not modified by the vitamin. The expression of matrix metalloproteinases 1, 2, and 9 was not significantly changed, but an increased level of tissue inhibitor of matrix metalloproteinase 1 mRNA was observed without modification of tissue inhibitor of matrix metalloproteinase 2 mRNA. The stimulating activity of topical vitamin C was most conspicuous in the women with the lowest dietary intake of the vitamin and unrelated to the level of actinic damage. The results indicate that the functional activity of the dermal cells is not maximal in postmenopausal women and can be increased. [less ▲]

Detailed reference viewed: 128 (10 ULg)
Full Text
See detailConception et développement d'une approche structurée de gestion forestière intégrée basée sur les méthode d'analyse multicritère
Bousson, Emmanuelle

Doctoral thesis (2001)

The main aim of this study was to develop a rigorous and structured approach to integrated forest management. This type of management can be defined as "concerted multi-purpose management" and takes into ... [more ▼]

The main aim of this study was to develop a rigorous and structured approach to integrated forest management. This type of management can be defined as "concerted multi-purpose management" and takes into account all the objectives that forest management should fulfil as well as the opinions of all the actors involved in the forestry sector. It integrates the subjectivity of the actors because there is no objectively optimal solution. The proposed approach consists of an evaluation and a multicriteria comparison of possible management alternatives. Based on simulations, these management options and the consequences of their application on the characteristics of forests have to be apprehended, using scenario modelling. Various criteria and indicators are then used to assess the capacity of each alternative to achieve each pre-defined objective. This assessment is the starting point for comparisons between the management alternatives, based on the multicriteria decision-making technique ELECTRE III, with a view to making recommendations to the decision-maker. The tools required to apply this approach in the context of temperate European public forests have been developed and a pilot project involving their application in a public forest covering some 800 hectares in the Walloon region provided an opportunity to illustrate and comment on the proposed approach. [less ▲]

Detailed reference viewed: 27 (4 ULg)
Full Text
Peer Reviewed
See detailThe anatomical distribution of radiological abnormalities in Kashin-Beck disease in Tibet
Hinsenkamp, Maurice; Ryppens, F.; Mathieu, F. et al

in International Orthopaedics (2001), 25

Detailed reference viewed: 5 (1 ULg)
Full Text
See detailPréface [à Infinitif, suivi de Sables, de Françoise Delcarte]
Purnelle, Gérald ULg

in Infinitif, suivi de Sables (2001)

Detailed reference viewed: 16 (1 ULg)
Full Text
Peer Reviewed
See detailLong-term Effects of Nonsteroidal Antiinflammatory Drugs on Human Chondrocytes in Alginate Beads
Sanchez, Christelle ULg; Deberg, Michelle ULg; Reginster, Jean-Yves ULg et al

in Annals of the Rheumatic Diseases (2001), 60(suppl1), 284

Detailed reference viewed: 17 (6 ULg)
Full Text
See detailAdolescents "abuseurs"? Pour un questionnement ethique et clinique
Malchair, Alain ULg

in Born, Michel (Ed.) Delinquance juvenile et famille (2001)

Detailed reference viewed: 26 (8 ULg)
Full Text
Peer Reviewed
See detailLes surcoûts de l’étalement urbain en Wallonie
Halleux, Jean-Marie ULg

in Etudes Foncières (2001), (94), 18-21

Detailed reference viewed: 34 (7 ULg)
Full Text
Peer Reviewed
See detailDoes F2 need a hard pomeron?
Cudell, Jean-René ULg; Soyez, G.

in Physics Letters B (2001), 516

Detailed reference viewed: 10 (4 ULg)
Full Text
Peer Reviewed
See detailLes configurations de risques comme approche de la résilience dans une étude longitudinale
Boët, S.; Born, Michel ULg

in Revue Québécoise de Psychologie (2001), 22(1), 93-116

Cette recherche s'inscrit dans le cadre d'une étude longitudinale des facteurs de risque et de protection en délinquance juvénile. Nous avons observé les pratiques éducatives de la mère ainsi que le ... [more ▼]

Cette recherche s'inscrit dans le cadre d'une étude longitudinale des facteurs de risque et de protection en délinquance juvénile. Nous avons observé les pratiques éducatives de la mère ainsi que le comportement de l'enfant de sa naissance à cinq ans. Nous avons pu mettre en évidence quatre configurations de risque familial qui s'avèrent contenir nombre des enfants les plus turbulents de notre échantillon. Cependant, ces configurations rassemblent aussi des enfants qui ne manifestent aucun trouble comportemental, ce sont des enfants que nous considérons comme résilients. [less ▲]

Detailed reference viewed: 75 (21 ULg)
Full Text
Peer Reviewed
See detailThe karyotype of the Formentera island garden dormouse, Eliomys quercinus ophiusae
Ramalhinho, Graça; Libois, Roland ULg

in Belgian Journal of Zoology (2001), 131(1), 83-85

Detailed reference viewed: 15 (2 ULg)
Full Text
Peer Reviewed
See detailExperimental and theoretical investigations of the electrical properties of undoped and magnesium-doped GaN layers
Nguyen, Ngoc Duy ULg; Germain, Marianne; Schmeits, Marcel et al

in Journal of Crystal Growth (2001), 230

The ac characteristics of GaN : Mg and undoped GaN layers, grown by MOVPE on sapphire substrates, are measured for a wide range of temperature and bias conditions, in order to investigate the effect of ... [more ▼]

The ac characteristics of GaN : Mg and undoped GaN layers, grown by MOVPE on sapphire substrates, are measured for a wide range of temperature and bias conditions, in order to investigate the effect of the magnesium-related level on the transport properties. Two peaks, whose height and position depend on the measurement temperature, are observed in the admittance curves (G/ω versus frequency) of the Mg-doped samples, whereas only one peak appears in undoped samples. The study of the frequency dependence of the impedance, with a model including the two metallic Au/GaN junctions, the GaN layer itself, shows that, besides the effect of the differential resistance of the layer which plays a role in both sample types, the presence of a Mg-related deep level contributes to the observed variations of the peaks in the admittance curves of the p-doped samples. Results of a theoretical steady-state and small-signal analysis based on numerical modelling of the Au/GaN/Au heterostructure complete our analysis. [less ▲]

Detailed reference viewed: 41 (3 ULg)
Full Text
See detailEstrategias sociopreventivas del hooliganismo
Comeron, Manuel ULg

in Colome, Gabriel (Ed.) Politica y Deporte (2001)

Une analyse comparative en Europe (Angleterre, Belgique, France, Espagne): évolution des politiques sportives, le sport et l'Etat, la lutte contre le hooliganisme, les stratégies préventives, le sport ... [more ▼]

Une analyse comparative en Europe (Angleterre, Belgique, France, Espagne): évolution des politiques sportives, le sport et l'Etat, la lutte contre le hooliganisme, les stratégies préventives, le sport comme spectacle médiatique. [less ▲]

Detailed reference viewed: 32 (1 ULg)
Full Text
Peer Reviewed
See detailInfluence of electrical properties on the evaluation of the surface hydrophobicity of Bacillus subtilis
Ahimou, F.; Paquot, Michel ULg; Jacques, P. et al

in Journal of Microbiological Methods (2001), 45(2), 119-126

The surface hydrophobicity of nine Bacillus subtilis strains in different states (spores, vegetative cells, and dead cells) was assessed by water contact angle measurements, hydrophobic interaction ... [more ▼]

The surface hydrophobicity of nine Bacillus subtilis strains in different states (spores, vegetative cells, and dead cells) was assessed by water contact angle measurements, hydrophobic interaction chromatography (HIC) and bacterial adhesion to hydrocarbon (BATH). Electrokinetic properties of B, subtilis strains were characterized by zeta potential measurements and found to differ appreciably according to the strain, Correlations between HIC data, BATH data and zeta potential showed that HIC and RATH are influenced by electrostatic interactions. Water contact angle measurements thus provide a better estimate of cell surface hydrophobicity. The water contact angle of B. subtilis varied according to the strain and the state, the spores tending to be more hydrophobic than vegetative cells. (C) 2001 Elsevier Science B.V. All rights reserved. [less ▲]

Detailed reference viewed: 18 (2 ULg)