References of "Article"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailOverhead Lines galloping and turbulent wind
Chabart, Olivier; Lilien, Jean-Louis ULg

in Bulletin Scientifique de l'Association des Ingénieurs Electriciens sortis de l'Institut Electrotechnique Montefiore (1997), 1

Galloping is modelled considering actual turbulent wind using frequency spectrum of the wind and spatial coherence.

Detailed reference viewed: 9 (4 ULg)
Peer Reviewed
See detailFibres alimentaires chez le chien : influence de l'incorporation de pulpes de betterave ou de chicorée sur la digestibilité des nutriments et les concentrations plasmatiques de plusieurs métabolites
Diez, Marianne ULg; Hornick, Jean-Luc ULg; Van Eenaeme, Christian ULg et al

in Revue de Médecine Vétérinaire (1997), 148

Cette étude relate les effets de la distribution de deux rations enrichies en pulpes de betterave ou de chicorée (7 p.100 ADF dans la matière sèche) en comparaison à une ration témoin sur les paramètres ... [more ▼]

Cette étude relate les effets de la distribution de deux rations enrichies en pulpes de betterave ou de chicorée (7 p.100 ADF dans la matière sèche) en comparaison à une ration témoin sur les paramètres fécaux, la digestibilité des principaux nutriments et plusieurs paramètres biochimiques (glucose, insuline, azote alpha-aminé, urée, cholestérol et triglycérides) mesurés à jeun ou pendant six heures après le repas chez huit chiens adultes en bonne santé. Les régimes enrichis en pulpes ont entraîné une augmentation significative de l'excrétion fécale totale, de l'excrétion de MS dans les matières fécales, une diminution de la teneur en MS des fèces ainsi qu'une diminution des coefficients de digestibilité des principaux nutriments. Le régime contenant la pulpe de betterave a entraîné une diminution de la glycémie à jeun, de l'insulinémie et des concentrations en triglycérides postprandiales, des concentrations en urée et en cholestérol mesurées avant et après le repas. Le régime contenant la pulpe de chicorée a provoqué une diminution de l'insulinémie postprandiale, des concentrations en urée et en cholestérol à jeun et après le repas. Ces deux types de pulpes, semblables par leur composition, induisent les mêmes types d'effets sur les paramètres fécaux et la digestibilité des nutriments, mais les effets systémiques sont plus importants lors de la distribution de pulpes de betterave. [less ▲]

Detailed reference viewed: 57 (2 ULg)
Full Text
Peer Reviewed
See detailPhenylarsine oxide inhibits ex vivo HIV-1 expression
Edeas, M.; Arbault, S.; Legrand-Poels, Sylvie ULg et al

in Biomedicine & Pharmacotherapy (1997)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailAnisotropie de la suceptibilité magnétique dans une intrusion composite de la suite charnockitique: l'apophyse du massif stratiforme de Bjerkreim-Sokndal (Rogaland, Norvège méridionale)
Bolle, Olivier ULg; Diot, Hervé; Duchesne, Jean-Clair ULg

in Comptes Rendus de l'Académie des Sciences. Série II, Mécanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre (1997), 325

Detailed reference viewed: 32 (1 ULg)
Full Text
Peer Reviewed
See detailRheological characterization on the BaTiO3 sol-gel transition
Van Cantfort, Olivier; Brasseur, Alain; Michaux, Bernard et al

in Faraday Discussions (1997), 101

Detailed reference viewed: 22 (3 ULg)
Full Text
Peer Reviewed
See detailBiochemical aspects of almond microcuttings related to in vitro rooting ability
Caboni, E.; Tonelli, M. G.; Lauri, P. et al

in Biologia Plantarum (1997), 39(1), 91-97

Microcuttings of seven genotypes of almond (Prunus dulcis Mill) used as peach rootstocks, showed different rooting ability in vitro. No direct relationship was found between peroxidase activity and total ... [more ▼]

Microcuttings of seven genotypes of almond (Prunus dulcis Mill) used as peach rootstocks, showed different rooting ability in vitro. No direct relationship was found between peroxidase activity and total phenol content, determined in the whole microcuttings prior to the root inducing treatment, and the rooting ability of these genotypes. However, a positive relationship was found between free indole-3-acetic acid (IAA) level and IAA-aspartate and the rooting response. After transferring into the rooting medium, peroxidase activity of the easiest-to-root genotype increase up to a peak and then declined and the total phenol content showed an opposite trend. These variations did not occur in the most difficult-to-root genotype. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailSur le bilinguisme dans les armées d'Hannibal
Rochette, Bruno ULg

in Etudes Classiques (Namur, Belgium) (1997), 65

Examen des divers témoignages antiques relatifs à la question linguistique au sein de l'armée d'Hannibal. Fort hétéroclite par son recrutement, cette armée présentait inévitablement une grande bigarrure ... [more ▼]

Examen des divers témoignages antiques relatifs à la question linguistique au sein de l'armée d'Hannibal. Fort hétéroclite par son recrutement, cette armée présentait inévitablement une grande bigarrure linguistique. On y trouvait cependant des interprètes et des soldats capables de s'exprimer dans la langue des ennemis ou de s'improviser eux-mêmes interprètes. De fait il existait un bilinguisme associant la connaissance d'une ou de plusieurs langues locales, d'une part, et du grec ou du latin, d'autre part. [less ▲]

Detailed reference viewed: 51 (0 ULg)
Peer Reviewed
See detailUne nouvelle sagesse en hiératique de la Basse Époque (Papyrus Brooklyn Museum 47.218.135)
Winand, Jean ULg

in Chronique d'Egypte : Bulletin Périodique de la Fondation Egyptologique Reine Elisabeth (1997), 72

Detailed reference viewed: 34 (4 ULg)
Full Text
Peer Reviewed
See detailHypochlorous acid activates NF-kappaB transcription factor in T lymphocytes
Schoonbroodt, Sonia; Legrand-Poels, Sylvie ULg; Best-Belpomme, Martin et al

in Biochemical Journal (1997)

Detailed reference viewed: 5 (2 ULg)
Full Text
Peer Reviewed
See detailUse Of Mycosphaerella Fijiensis Toxins For The Selection Of Banana Cultivars Resistant To Black Leaf Streak
Harelimana, Germain; Lepoivre, Philippe ULg; Jijakli, Haissam ULg et al

in Euphytica : International Journal of Plant Breeding (1997), 96(1), 125-128

Detailed reference viewed: 43 (4 ULg)
Peer Reviewed
See detailRuptured Aneurysm of the Profunda Femoral Artery Associated with Polyaneurysmal Disease
Defraigne, Jean-Olivier ULg; Vasquez, C.; Limet, Raymond ULg

in Acta Chirurgica Belgica (1997), 97(2), 93-6

A 73-year-old man was admitted for rupture of an atherosclerotic aneurysm of the profunda femoris artery associated to popliteal and bilateral axillary arteries aneurysms. The aneurysm of the profunda ... [more ▼]

A 73-year-old man was admitted for rupture of an atherosclerotic aneurysm of the profunda femoris artery associated to popliteal and bilateral axillary arteries aneurysms. The aneurysm of the profunda femoris artery was developed between the branches of the crural nerves. Considering the patency of the superficial femoral artery and of the leg arterie, and to avoid injury to the crural nerve, no reconstruction of the profunda femoris was attempted. The aneurysm was ligated proximally and buttress sutures were placed on the site of rupture to achieve thrombosis of the aneurysms. Most of the published cases of aneurysm of the profunda femoris artery are false aneurysms developed after various trauma. Atherosclerotic aneurysm of the profunda femoris artery is a rare lesion and rupture is exceptional. [less ▲]

Detailed reference viewed: 14 (0 ULg)
Full Text
Peer Reviewed
See detailSurface Molecular Structure of Self-Assembled Alkanethiols Evidenced by UPS and Photoemission with Synchrotron Radiation
Duwez, Anne-Sophie ULg; Di Paolo, Stéphanie; Ghijsen, Jacques et al

in Journal of Physical Chemistry B (1997), 101

With the aim of investigating the configurational and conformational characteristics of monolayers of alkanethiols on gold by means of a photoemission experiment, we compare the valence data obtained from ... [more ▼]

With the aim of investigating the configurational and conformational characteristics of monolayers of alkanethiols on gold by means of a photoemission experiment, we compare the valence data obtained from these layers using synchrotron radiation and ultraviolet photoemission spectroscopy (UPS). The incident energy used for synchrotron radiation has been chosen very close to the Cooper minimum of the 5d levels of gold, in order to limit as much as possible interference from the substrate. The recorded spectra differ markedly from one sample to another, notwithstanding their closely related chemical nature. These variations are compared consistently with semiquantitative simulations on model clusters and found thereby to reflect specifically the influence of the connectivity and of specific interactions on the electronic structure of long hydrocarbon chains [less ▲]

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailSpecies assemblages and indicator species: The need for a flexible asymmetrical approach
Dufrêne, Marc ULg; Legendre, P.

in Ecological Monographs (1997), 67(3), 345-366

This paper presents a new and simple method to find indicator species and species assemblages characterizing groups of sites. The novelty of our approach lies in the way we combine a species relative ... [more ▼]

This paper presents a new and simple method to find indicator species and species assemblages characterizing groups of sites. The novelty of our approach lies in the way we combine a species relative abundance with its relative frequency of occurrence in the various groups of sites. This index is maximum when all individuals of a species are found in a single group of sites and when the species occurs in all sites of that group; it is a symmetric indicator. The statistical significance of the species indicator values is evaluated using a randomization procedure. Contrary to TWINSPAN, our indicator index for a given species is independent of the other species relative abundances, and there is no need to use pseudospecies. The new method identifies indicator species for typologies of species releves obtained by any hierarchical or nonhierarchical classification procedure; its use is independent of the classification method. Because indicator species give ecological meaning to groups of sites, this method provides criteria to compare typologies, to identify where to stop dividing clusters into subsets, and to point out the main levels in a hierarchical classification of sites. Species can be grouped on the basis of their indicator values for each clustering level, the heterogeneous nature of species assemblages observed in any one site being well preserved. Such assemblages are usually a mixture of eurytopic (higher level) and stenotopic species (characteristic of lower level clusters). The species assemblage approach demonstrates the importance of the 'sampled patch size,' i.e., the diversity of sampled ecological combinations, when we compare the frequencies of core and Satellite species. A new way to present species-site tables, accounting for the hierarchical relationships among species, is proposed. A large data set of carabid beetle distributions in open habitats of Belgium is used as a case study to illustrate the new method. [less ▲]

Detailed reference viewed: 42 (7 ULg)
Full Text
Peer Reviewed
See detailImage du mois. Syncope vasovagale en direct.
Scheen, André ULg; Marchand, Monique ULg; Juchmes, J.

in Revue Médicale de Liège (1997), 52(5), 315

Detailed reference viewed: 39 (0 ULg)
Full Text
Peer Reviewed
See detailFamilial Crohn's Disease: A Study of 18 Families
Franchimont, D.; Belaiche, Jacques ULg; Louis, Edouard ULg et al

in Acta Gastro-Enterologica Belgica (1997), 60(2, Apr-Jun), 134-7

The high frequency of familial Crohn's disease (CD) suggests a genetic predisposition. The most recent data from epidemiology and molecular biology are consistent with a multifactorial, polygenic ... [more ▼]

The high frequency of familial Crohn's disease (CD) suggests a genetic predisposition. The most recent data from epidemiology and molecular biology are consistent with a multifactorial, polygenic inheritance with a possible genetic heterogeneity. The aim of our study was, first to compare familial and sporadic CD on the basis of the type and location of the disease, and age at diagnosis, and second, to evaluate among families, the concordance rate for the type and location of the disease. PATIENTS AND METHODS: 18 families with 2 (n = 16) and 3 (n = 2) affected first degree relatives were studied. They were compared to a population of 154 sporadic CD coming from the same gastroenterology unit. RESULTS: Age at diagnosis was the same in sporadic and familial CD. There was an increased frequency of ileal (p = 0.02), and fibro stenotic (p = 0.005) CD and a decreased frequency of colonic (p = 0.006) and inflammatory (p = 0.02) disease, in familial CD. There was a significant increase in concordance rate for fibrostenotic disease (p < 0.001) and a decrease for inflammatory disease (p < 0.01), among the families. The observed concordance rate for the location of the disease was not significantly different from the expected one. In conclusion, these data suggest that CD may be heterogenous and that different clinical patterns may be determined either by genetic or environmental factors. [less ▲]

Detailed reference viewed: 10 (1 ULg)
Full Text
Peer Reviewed
See detailRelative and absolute in Leibniz' physics and metaphysics
Bouquiaux, Laurence ULg

in Epistemologia (1997)

Detailed reference viewed: 19 (2 ULg)
Full Text
Peer Reviewed
See detailThe effect of dispersion and atomisation conditions on the compaction response of silicon nitride granules
Destoop, Vincent; Mertens, Anne ULg; Hendrix, W. et al

in Key Engineering Materials [=KEM] (1997), 132-136

The relationship between the dispersion conditions of silicon nitride slurries and the compaction behaviour of spray dried granules is reported in the case of two commercial powders. Two parameters have ... [more ▼]

The relationship between the dispersion conditions of silicon nitride slurries and the compaction behaviour of spray dried granules is reported in the case of two commercial powders. Two parameters have been retained: the solid loading, varied between 10 and 30 vol.% and the degree of stability of the suspension, controlled by adjustment of the pH. [less ▲]

Detailed reference viewed: 56 (4 ULg)
Full Text
Peer Reviewed
See detailRheological characterization of BaTiO3 sol-gel transition
Brasseur, Alain; Michaux, Bernard; Pirard, René ULg et al

in Journal of Sol-Gel Science and Technology (1997), 9(1), 5-15

BaTiO3 gels were prepared by hydrolysis and polycondensation reactions between titanium isopropoxide and barium hydroxide in presence of methoxyethanol, methanol and water. The rheology of the sol-gel ... [more ▼]

BaTiO3 gels were prepared by hydrolysis and polycondensation reactions between titanium isopropoxide and barium hydroxide in presence of methoxyethanol, methanol and water. The rheology of the sol-gel transition was studied with a rheometer allowing low amplitude sinusoidal oscillations. Experimental data show a continuous increase in the complex viscosity along with time, showing the progressive character of the transition. The influence of synthesis operating variables was studied. The gelation time, which definition is based on viscoelastic measurements, increases exponentially when the water content is increased, when the dilution due to the methoxyethanol is reduced or when the temperature is lowered. Different growth models were used for the characterization of the particles in the solution. These models suggest that the polymerisation first produces spherical particles (mass fractals) and that these spherical particles then agglomerate to form a linear network. [less ▲]

Detailed reference viewed: 54 (5 ULg)
Full Text
Peer Reviewed
See detailInfluence of cholesterol on survival after stroke. Cholesterol may be marker of inflammation.
VALDES SOCIN, Hernan Gonzalo ULg

in BMJ (Clinical Research ed.) (1997), 315(7116), 1159

Detailed reference viewed: 10 (7 ULg)
Full Text
Peer Reviewed
See detailLoss of calcyphosin gene expression in mouse and other rodents
Clément, S.; Dumont, J.; Schurmans, Stéphane ULg

in Biochemical and Biophysical Research Communications (1997), 232

alcyphosine-for calcium binding and regulated by cyclic AMP through phosphorylation protein-is a target of both the cyclic AMP and the Ca(+2)-phophatidylinositol cascades first isolated from dog thyroid ... [more ▼]

alcyphosine-for calcium binding and regulated by cyclic AMP through phosphorylation protein-is a target of both the cyclic AMP and the Ca(+2)-phophatidylinositol cascades first isolated from dog thyroid, and then from rabbit and human brain. Although the exact function of this 24kD protein is unknown, calcyphosine could be implicated in the cross-signaling between these cascades to coordinate cellular proliferation and differentiation. Here, we report the sequence of a pseudogene which is the murine calcyphosine homologue, and demonstrate that it represents the unique sequence homologous to the dog calcyphosine gene in the murine genome. The lack of expression of this murine pseudogene in brain and thyroid-two major sites of dog calcyphosine expression-was extended to 5 other rodents, and suggest the existence of alternative pathway(s) to fill the function of calcyphosine in rodents [less ▲]

Detailed reference viewed: 43 (5 ULg)
Peer Reviewed
See detailApprentissage implicite et temps de réaction sériel: Une perspective développementale
Meulemans, Thierry ULg; Van der Linden, Martial ULg; Perruchet, Pierre

in Neuropsychiatrie de l'Enfance et de l'Adolescence (1997), 45(7-8), 384-386

Detailed reference viewed: 113 (17 ULg)
Full Text
Peer Reviewed
See detailSynthesis and characterization of monodisperse spherical zirconia particles
Van Cantfort, Olivier; Michaux, Bernard; Pirard, René ULg et al

in Journal of Sol-Gel Science and Technology (1997), 8

Detailed reference viewed: 29 (3 ULg)
Full Text
Peer Reviewed
See detailImpaired LTP induction in dentate gyrus of calretinin-deficient mice
Schurmans, Stéphane ULg; Schiffmann, S. N.; Gurden, H. et al

in Proceedings of the National Academy of Sciences of the United States of America (1997), 94

Calretinin (Cr) is a Ca21 binding protein present in various populations of neurons distributed in the central and peripheral nervous systems. We have generated Cr-deficient (Cr2/2) mice by gene targeting ... [more ▼]

Calretinin (Cr) is a Ca21 binding protein present in various populations of neurons distributed in the central and peripheral nervous systems. We have generated Cr-deficient (Cr2/2) mice by gene targeting and have investigated the associated phenotype. Cr2/2 mice were viable, and a large number of morphological, biochemical, and behavioral parameters were found unaffected. In the normal mouse hippocampus, Cr is expressed in a widely distributed subset of GABAergic interneurons and in hilar mossy cells of the dentate gyrus. Because both types of cells are part of local pathways innervating dentate granule cells andyor pyramidal neurons, we have explored in Cr2/2 mice the synaptic transmission between the perforant pathway and granule cells and at the Schaffer commissural input to CA1 pyramidal neurons. Cr2/2 mice showed no alteration in basal synaptic transmission, but long-term potentiation (LTP) was impaired in the dentate gyrus. Normal LTP could be restored in the presence of the GABAA receptor antagonist bicuculline, suggesting that in Cr2/2 dentate gyrus an excess of g-minobutyric acid (GABA) release interferes with LTP induction. Synaptic transmission and LTP were normal in CA1 area, which contains only few Cr-positive GABAergic interneurons. Cr2/2 mice performed normally in spatial memory task. These results suggest that expression of Cr contributes to the control of synaptic plasticity in mouse dentate gyrus by indirectly regulating the activity of GABAergic interneurons, and that Cr2/2 mice represent a useful tool to understand the role of dentate LTP in learning and memory [less ▲]

Detailed reference viewed: 34 (3 ULg)
Full Text
Peer Reviewed
See detailCharacterization of the IGF system and analysis of the possible molecular mechanisms leading to IGF-II overexpression in a mesothelioma.
Hodzic, D.; Delacroix, Laurence ULg; Willemsen, P. et al

in Hormone & Metabolic Research (1997), 29(11), 549-55

The expression of members of the IGF system in a mesothelioma from a patient suffering from hypoglycemia, in term placenta and HT29 colon adenocarcinoma cells were compared. Very high levels of IGF-II ... [more ▼]

The expression of members of the IGF system in a mesothelioma from a patient suffering from hypoglycemia, in term placenta and HT29 colon adenocarcinoma cells were compared. Very high levels of IGF-II mRNA and protein were detected in the mesothelioma. Moreover, half of the IGF-II protein took the high-molecular-weight form. We also analyzed the parental imprinting status and the promoter usage of the IGF-II gene. Our results showed loss of imprinting (LOI) in the mesothelioma while the imprinting was maintained in HT29 cells, expressing moderate levels of the transcript. Promoter P4 was active in the three tissues we analyzed, whereas IGF-II mRNA transcription from promoter P3 was only detected in the mesothelioma and the placenta, expressing comparably high levels of the transcript. IGF-II gene structure was identical in the analyzed tissues and cells. The type-I receptor mRNA expression was very low in the tumor. IGFBP-2, -4 and -5 mRNAs were detected in the mesothelioma, while IGFBP-2, -3 and -5 transcripts were detected in the placenta. IGFBP-1 and -6 transcripts were not detected. [less ▲]

Detailed reference viewed: 14 (0 ULg)
Peer Reviewed
See detailLa lamotrigine (Lamictal).
Scheen, André ULg

in Revue Médicale de Liège (1997), 52(11), 738-40

Detailed reference viewed: 41 (0 ULg)
Peer Reviewed
See detailMétastases ganglionnaires, hépatiques et osseuses d'un chemodectome carotidien. A propos d'un cas
DEFRAIGNE, Jean ULg; Limet, Raymond ULg

in Journal de Chirurgie (1997), 134(7-8), 336-9

A case of malignant carotid body tumor with nodal, hepatic and bone metastases is reported. Carotid body chemodectomas are slow-growing tumors which invade local structures. These tumors are usually ... [more ▼]

A case of malignant carotid body tumor with nodal, hepatic and bone metastases is reported. Carotid body chemodectomas are slow-growing tumors which invade local structures. These tumors are usually benign but can occasionally produce local and distant metastases. Development of metastatic localizations is the only formal proof of malignancy as histology cannot distinguish between benign and malignant chemodectomas. Bilateral carotid arteriography gives the diagnosis. Surgery is the basis of treatment and should be performed early in the course to limit operative complications. Radiotherapy can be given as adjuvant treatment. [less ▲]

Detailed reference viewed: 22 (0 ULg)
Peer Reviewed
See detailLa langue des Cariens. A propos de B 867
Rochette, Bruno ULg

in Glotta : Zeitschrift für Griechische und Lateinische Sprache (1997), 74

Detailed reference viewed: 13 (5 ULg)
Full Text
Peer Reviewed
See detailTextural properties and thermal stability of silica-zirconia aerogels
Pirard, René ULg; Bonhomme, Damien; Kolibos, Sofia et al

in Journal of Sol-Gel Science and Technology (1997), 8

Detailed reference viewed: 48 (8 ULg)
Peer Reviewed
See detailComment j'explore ... Une maladie de Basedow: de la clinique classique au diagnostic radio-immunologique.
Scheen, André ULg

in Revue Médicale de Liège (1997), 52(12), 788-91

Detailed reference viewed: 41 (3 ULg)
Full Text
Peer Reviewed
See detailGrands arrêts récents en matière d’obligations
Moreau-Margrève, Irma; Biquet, Christine ULg; Gosselin, Antoinette ULg

in Actualités du Droit (1997)

Detailed reference viewed: 18 (1 ULg)
Full Text
See detailZiemniak w Belgii
Burny, Philippe ULg; Gazinski, Benon

in Rolnicze abc (1997), 6(83), 20

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detailImmunohistochemical analysis of proliferative activity and steroid receptor expression in peritoneal and ovarian endometriosis
NISOLLE, Michelle ULg; Casanas-Roux, Françoise; Donnez, Jacques

in Fertility and Sterility (1997), 68(5), 912-919

Objective: To assess the proliferative activity of eutopic and ectopic endometrium throughout the menstrual cycle and its correlation to steroid receptor content. Design: The immunohistochemical use of Ki ... [more ▼]

Objective: To assess the proliferative activity of eutopic and ectopic endometrium throughout the menstrual cycle and its correlation to steroid receptor content. Design: The immunohistochemical use of Ki 67 was applied to investigate the proliferation index. A recently advanced stereographic computer technology was used to investigate steroid receptors. Setting: University hospital department of gynecology. Patient(s): Biopsies of eutopic endometrium, black and red peritoneal endometriotic lesions, and ovarian endometriomas were taken from infertile patients and classified according to the phase of the cycle. Result(s): In normal endometrium, the glandular proliferation index was highest during the proliferative phase and was statistically significantly reduced during the secretory phase. No proliferative activity was observed in the late secretory phase. No statistically significant differences were found between ectopic endometrium and eutopic endometrium except during the late secretory phase, when proliferative activity was still present in endometriotic tissue. The stromal proliferation index was similar in red lesions, ovarian endometriomas, and eutopic endometrium during the secretory phase. In normal endometrium, the highest concentrations of estrogen receptors (ERs) and P receptors (PRs) occurred in the epithelial and stromal cells during the late proliferative phase of the menstrual cycle. Estrogen receptor and PR content declined throughout the secretory phase. In ectopic endometrium, PR persisted in the glandular epithelium during the late secretory phase. Estrogen receptors persisted in the glandular epithelium and stroma of red peritoneal lesions and ovarian endometriomas during the late secretory phase. Conclusion(s): The high proliferative activity and the persistence of ERs and PRs in the stroma of red lesions and ovarian endometriomas emphasize the primordial role of the stroma in the development of endometriosis and suggest different mechanisms of proliferation control from those observed in eutopic endometrium. [less ▲]

Detailed reference viewed: 4 (0 ULg)
Full Text
Peer Reviewed
See detailFeeding of the sparid fish Sarpa salpa in a seagrass ecosystem: Diet and carbon flux
Havelange, S.; Lepoint, Gilles ULg; Dauby, Patrick ULg et al

in Marine Ecology (1997), 18(4), 289-297

In Revellata Bay (Gulf of Calvi, Corsica, France), the sparid fish Sarpa salpa L. is the main macro-consumer of Posidonia oceanica (L.) DELILE leaf. Stomach contents were analysed and C-13/C-12 isotopic ... [more ▼]

In Revellata Bay (Gulf of Calvi, Corsica, France), the sparid fish Sarpa salpa L. is the main macro-consumer of Posidonia oceanica (L.) DELILE leaf. Stomach contents were analysed and C-13/C-12 isotopic ratios were measured in fish muscle and potential food sources (algae, P. oceanica leaf and its epiphytes) to determine their relative contribution to the fish diet. S. salpa has an age-related mixed diet: juveniles are plankton feeders, young, sub-adults and adults are herbivorous, and, the older the individuals, the higher the relative contribution of P. oceanica to the diet. Our results and former studies of carbon stocks and fluxes in the P. oceanica bed of Revellata Bay have enabled an estimation of the general impact of S. salpa grazing on infralittoral communities: the studied species consumes 24 g C.m-2.a(-1) from P. oceanica leaf, 4.8 from epiphytes and 13 from epilithic algae. The fish net production and biomass turnover in that zone have been estimated to be 1.2 g C.m(-2).a(-1) and 1.5 a(-1), respectively. [less ▲]

Detailed reference viewed: 164 (10 ULg)
Full Text
Peer Reviewed
See detailEcotoxicological and pathological studies of common guillemots Uria aalge beached on the Belgian coast during six successive wintering periods (1989-90 to 1994-95)
Debacker, Virginie ULg; Holsbeek, Ludo; Tapia, German et al

in Diseases of Aquatic Organisms (1997), 29(3), 159-168

During 6 successive wintering periods, 727 common guillemots Uria aalge were recovered from Belgian beaches. One-third of the birds were already dead; the rest passed through rehabilitation centres where ... [more ▼]

During 6 successive wintering periods, 727 common guillemots Uria aalge were recovered from Belgian beaches. One-third of the birds were already dead; the rest passed through rehabilitation centres where they eventually died. All birds were monitored for general condition (body mass, fat reserves), eventual status of oiling and pathological changes (cachexia, acute hemorrhagic gastroenteropathy); 339 birds were sampled for trace metals (total and organic Hg, Cu, Zn, Fe, Cd) and PCB (polychlorinated biphenyl) analysis. Oiling is still a major cause of death for wintering pelagic seabirds: half of the birds showed signs of external or internal oiling, probably a still greater number of oiled birds never reach the shores. Although a low body mass can be considered a normal winter condition for wintering guillemots, pathology results showed that three-quarters of the studied animals were in a state of cachexia with emaciated pectoral muscle and lowered muscle lipid content. Elevated levels of Cu, Zn, Hg and PCBs were linked to the state of cachexia and may well represent an additional stress factor leading to the debilitation and death of part of the wintering guillemot population. [less ▲]

Detailed reference viewed: 43 (20 ULg)
Peer Reviewed
See detailLes hermeneis dans le christianisme primitif. Aux sources du schisme byzantin
Rochette, Bruno ULg

in Byzantion : Revue Internationale des Etudes Byzantines (1997), 67

Detailed reference viewed: 11 (0 ULg)
Full Text
See detailSuivi satellitaire de la migration automnale de la cigogne noire. Aléas et perspectives d'avenir
Libois, Roland ULg; Jadoul, Gérard

in Aves (1997), 34(1), 20-22

Detailed reference viewed: 20 (2 ULg)
Full Text
See detailUne étude du style de vie de jeunes dans l’Union Européenne. Qu’en conclure et quels enseignements en tirer?
Piéron, Maurice; Ledent, Maryse; Delfosse, Catherine et al

in Sport (1997), 159/160

La littérature internationale continue à rassembler des indices en nombre croissant montrant l'étroite relation entre l'état de santé et la condition physique. Toutefois, une évolution très nette se ... [more ▼]

La littérature internationale continue à rassembler des indices en nombre croissant montrant l'étroite relation entre l'état de santé et la condition physique. Toutefois, une évolution très nette se marque dans l'identification des déterminants importants. La condition physique apparaît comme un produit très transitoire qui se détériore à partir du moment où l'on cesse de l'entretenir. ... [less ▲]

Detailed reference viewed: 198 (2 ULg)
Full Text
See detailMulti-Cité, une expérience de formation initiale inédite
Beckers, Jacqueline ULg; Stegen, Pierre; Merenne-Schoumaker, Bernadette ULg et al

in Puzzle (1997), 2(juin), 10-16

L'article présente l'expérience de formation co-jointe de futurs professeurs de géographie de l'ULg et de la Haute Ecole Charlemagne via la réalisation d'un jeu pédagogique portant sur la gestion urbaine ... [more ▼]

L'article présente l'expérience de formation co-jointe de futurs professeurs de géographie de l'ULg et de la Haute Ecole Charlemagne via la réalisation d'un jeu pédagogique portant sur la gestion urbaine, jeu publié dans GEO 41. [less ▲]

Detailed reference viewed: 33 (11 ULg)
Peer Reviewed
See detailSur les accents et les marques de quantité dans les papyrus latins
Rochette, Bruno ULg

in Zeitschrift für Papyrologie und Epigraphik (1997), 119

Detailed reference viewed: 5 (0 ULg)
Peer Reviewed
See detailCortical application of potassium chloride induces the low-molecular weight heat shock protein (Hsp27) in astrocytes.
Plumier, Jean-Christophe ULg; David, Jean-Claude; Robertson, H. A. et al

in Journal of Cerebral Blood Flow & Metabolism (1997), 17(7), 781-90

Spreading depression induces tolerance to ischemic injury, and ischemic tolerance has been associated with expression of heat shock proteins (Hsp). Here we examine Hsp27 expression after KCl-induced ... [more ▼]

Spreading depression induces tolerance to ischemic injury, and ischemic tolerance has been associated with expression of heat shock proteins (Hsp). Here we examine Hsp27 expression after KCl-induced spreading depression. Twenty-minute cortical KCl application induced Hsp27 immunoreactivity in glial fibrillary acidic protein-positive astrocytes of the ipsilateral neocortex. Systemic administration of MK-801 (3 mg/kg) suppressed KCl-induced Hsp27 expression in the parietal cortex. Astrocytes in the posterior cingulate and retrosplenial cortex did not express Hsp27 after KCl application but did express Hsp27 after systemic administration of high dose MK-801 (9 mg/kg). Whereas Hsp27 was usually observed in all layers of the parietal cortex after 5-minute application of KCl, in 2 of 6 rats, Hsp27 was seen in clusters of astrocytes or in astrocytes in the superficial layers I to III of the parietal cortex. We conclude that (1) cortical application of KCl triggered Hsp27 astrocytic expression; (2) astrocytes in the cingulate and retrosplenial cortex responded differently compared with astrocytes of the parietal cortex; (3) Hsp27 expression progressed from small clusters of astrocytes throughout superficial layers of the cortex that joined and recruited astrocytes in deeper layers; (4) several mechanisms induced Hsp27 astrocytic expression. We propose that Hsp27 is involved in spreading depression-induced ischemic tolerance through protection of astrocyte function. [less ▲]

Detailed reference viewed: 26 (4 ULg)
Full Text
Peer Reviewed
See detailOn endostyle ultrastructure in two new species of doliolid-like tunicates
Compère, Philippe ULg; Godeaux, Jean ULg

in Marine Biology (1997), 128

Detailed reference viewed: 14 (4 ULg)
Full Text
Peer Reviewed
See detailPower system security assessment: a position paper
Marceau, R.J.; Endrenyi, J.; Allan, R. et al

in Electra (1997), 175

Detailed reference viewed: 61 (1 ULg)
Peer Reviewed
See detailRecherches en production laitière et valorisation du lait.
Blecker, Christophe ULg; Burny, Philippe ULg; Fabry, Jules et al

in Annales de Gembloux (1997), 102(3-4), 131-181

Detailed reference viewed: 130 (56 ULg)
Full Text
Peer Reviewed
See detailThe Cloning And Sequencing Of An Ovine C-Myc Cdna
Kiermer, V.; Dequiedt, Franck ULg; Masengo, R. et al

in DNA Sequence : The Journal of DNA Sequencing & Mapping (1997), 7(3-4),

Detailed reference viewed: 23 (7 ULg)
Peer Reviewed
See detailEarliest Taeniate Bisaccates from the Amazon basin are not older than Westphalian.
Loboziak, S; Melo, J.H.G.; Dino, R et al

in Geobios (1997), 30(4), 467-474

Detailed reference viewed: 3 (0 ULg)
Full Text
Peer Reviewed
See detailOxidation of allylselenides with the Sharpless AD-reagents
Krief, Alain; Colaux, Catherine ULg; Dumont, willy

in Tetrahedron Letters (1997), 38(18), 3315-3318

Allylselenides are efficiently oxidized by AD-mix reagents. Oxidation takes chemoselectively place on the selenium atom of allylselenides bearing a methylseleno or a phenylseleno moiety, but ... [more ▼]

Allylselenides are efficiently oxidized by AD-mix reagents. Oxidation takes chemoselectively place on the selenium atom of allylselenides bearing a methylseleno or a phenylseleno moiety, but chemoselectively occurs on the C,C double bond of the corresponding o-nitrophenyl derivatives. [less ▲]

Detailed reference viewed: 17 (4 ULg)
Peer Reviewed
See detailPhysical activity, obesity, and cardiovascular risk factors in children. The Belgian Luxembourg Child Study II.
Guillaume, Michèle ULg; Lapidus, L.; Bjondorp, P. et al

in Obesity Research (1997), 5(6), 549-56

Physical activity was measured in relation to cardiovascular (CV) risk factors in a randomly selected population of 1028 children from Province de Luxembourg in Belgium, a mainly rural area with a high ... [more ▼]

Physical activity was measured in relation to cardiovascular (CV) risk factors in a randomly selected population of 1028 children from Province de Luxembourg in Belgium, a mainly rural area with a high prevalence of such risk factors among adults and children. Physical activity was estimated as participation in sport activities, a major indicator of leisure-time physical activity in schoolchildren, and physical inactivity was estimated as frequency and duration of television (TV) watching. Boys participated more frequently in sport activities than girls did (p = 0.001). A majority of the children watched TV daily. After age adjustment, bodyweight (girls, p < 0.012; boys, p < 0.027) and, in boys, body mass index (BMI) (p < 0.039) were related to days per week of TV watching. No significant relationships with other CV risk factors remained after adjustments for BMI. In analyses of independent contributions of age, TV watching, and sports activity on CV risk factors, age showed highly significant relationships. In boys, TV showed relationships with BMI (p < 0.04) and (borderline) with systolic blood pressure, independent of age and sports activity, whereas the latter was significantly related to subscapular skinfold (p < 0.04) and (borderline) with triceps skinfold and cholesterol. In girls, no significant independent contributions to risk factor associations were found. The father's education was directly associated with sports activities, whereas the mother being a housewife showed negative relationships to physical activity and positive to TV watching in their children, suggesting socioeconomic influence on the activity patterns of children. Furthermore, registrations suggested less physical activity in the most rural part of the area. It is concluded that children in this mainly rural area watch TV frequently. In boys, physical inactivity, measured both as TV watching and as registrations of sports activities, contributes independently to body fat mass. In girls, no contribution or weaker contributions of physical inactivity were found. This suggests that contributory factors leading to obesity might be different in girls and boys. [less ▲]

Detailed reference viewed: 48 (7 ULg)
Peer Reviewed
See detailNon-insulin-dependent diabetes mellitus in the elderly.
Scheen, André ULg

in Bailliere's Clinical Endocrinology and Metabolism (1997), 11(2), 389-406

The prevalence of non-insulin-dependent diabetes mellitus dramatically increases with age. Older diabetic subjects have an increased frequency of complications from diabetes compared with their younger ... [more ▼]

The prevalence of non-insulin-dependent diabetes mellitus dramatically increases with age. Older diabetic subjects have an increased frequency of complications from diabetes compared with their younger counterparts and higher morbidity and mortality rates compared with age-matched non-diabetic controls. Elderly patients with diabetes are generally treated following the same approach as in younger patients: dietary therapy first, followed by oral hypoglycaemic agents and ultimately insulin. However, several specificities should be pointed out. Changes associated with ageing may affect the pharmacokinetics and pharmacodynamics of both sulphonylureas (increasing the risk of severe hypoglycaemia) and biguanides (increasing the risk of lactic acidosis). The best insulin regimen in old age is not known, but a twice-daily injection of a pre-mixed insulin preparation is usually recommended. Goals of therapy must be realistic and not cause disabling side-effects. The general practitioner plays a crucial role in the care of elderly diabetic patients, but access to a multidisciplinary specialized team may be necessary. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailUn cas de néoténie dans un bâtiment désaffecté, chez le Triton alpestre, Triturus alpestris apuanus (Salamandridae)
Denoël, Mathieu ULg

in Alytes (1997), 15

A population of Triturus alpestris apuanus of the Apuane Alps (Tuscany , Italy) was studied during July 1994. The particularity of this population is that it breeds in an artificial site, in the dark and ... [more ▼]

A population of Triturus alpestris apuanus of the Apuane Alps (Tuscany , Italy) was studied during July 1994. The particularity of this population is that it breeds in an artificial site, in the dark and under cover, in a deserted building. Moreover some neotenic newts were discovered. The recent colonization and the instability of this biotope indicate a form of labile neoteny, appearing and disappearing spontaneously. [less ▲]

Detailed reference viewed: 217 (8 ULg)
Peer Reviewed
See detailAlternative techniques of hysterectomy.
NISOLLE, Michelle ULg; Donnez, Jacques

in New England Journal of Medicine [=NEJM] (1997), 336(4), 291-2

Detailed reference viewed: 12 (2 ULg)
Peer Reviewed
See detailComment j'explore ... le syndrome d'insulinoresistance grace a ses marqueurs biologiques.
Luyckx, Françoise ULg; Scheen, André ULg; Gielen, Jean-Louis ULg et al

in Revue Médicale de Liège (1997), 52(10), 686-91

Detailed reference viewed: 29 (1 ULg)
Peer Reviewed
See detailRisultati clinici ed angiografici immediati ed a lungo termine dello stent Wiktor nel trattamento delle occlusioni coronariche croniche.
Anzuini, A.; Rosanio, S.; Legrand, Victor ULg et al

in Giornale italiano di cardiologia (1997), 27(9), 881-91

BACKGROUND: Percutaneous transluminal coronary angioplasty (PTCA) of chronic total coronary artery occlusions is associated with very high restenosis and reocclusion rates. Coronary stenting has been ... [more ▼]

BACKGROUND: Percutaneous transluminal coronary angioplasty (PTCA) of chronic total coronary artery occlusions is associated with very high restenosis and reocclusion rates. Coronary stenting has been proposed as a means of improving outcome. However, the Wiktor device for chronic coronary occlusion has never been tested in a large patient sample. This study reports the first multicenter experience with the Wiktor stent for treatment of chronic occlusions. METHODS: From January 1993 to December 1996, 89 consecutive patients with 91 chronic occlusions underwent Wiktor stent implantation after successful PTCA. Post-stenting regimen consisted of coumadin plus aspirin in the first 49 (55%) patients and aspirin plus ticlopidine in the following 40 (45%). RESULTS: Stenting was successful in 87 (98%) patients. At 1 month, 6% of patients had subacute stent thrombosis, 1% access-site complications and 3% major bleeding events. Stent thrombosis showed a univariate association with coumadin therapy (p = 0.009). Angiographic follow-up was obtained in 93% of 82 eligible patients. Restenosis rate was 32%, including 4% reocclusions. Through multiple logistic regression analysis, restenosis was independently associated with multiple stents (odds ratio-OR = 27.67, 95% confidence interval-CI = 4.25 to 79.95, p = 0.0008) and increasing values of occlusion length (OR = 1.23, 95% CI = 1.09 to 1.39, p = 0.001). Freedom from death, myocardial infarction or stented vessel revascularization was 87 and 72% at one and three years, respectively. CONCLUSIONS: Short- and long-term clinical and angiographic outcomes are favorable in patients undergoing Wiktor stent implantation for chronic coronary occlusion. Further technical refinements are needed to reduce restenosis rate in patients with long lesions and multiple stents. [less ▲]

Detailed reference viewed: 7 (0 ULg)
See detailUne route mérovingienne en Hautes-Fagnes (La Via Mansuerisca ?). Derniers résultats scientifiques.
Streel, Maurice ULg

in Bulletin de l"Académie Royale de Belgique, Classe Sciences 6e série (1997), VIII(7-12), 367-376

Detailed reference viewed: 17 (0 ULg)
Full Text
Peer Reviewed
See detailComparison of hindquarter metabolite uptakes in Belgian Blue double-muscled bulls at maintenance or during fattening.
Hornick, Jean-Luc ULg; Van Eenaeme, Christian ULg; Diez, Marianne ULg et al

in Journal of Animal Science (1997), 75(12), 3331-41

Metabolism of muscle growth in the hindquarter was investigated by the arterio-venous difference (AVD) technique in Belgian Blue double-muscled type bulls at maintenance or at fattening. The bulls were ... [more ▼]

Metabolism of muscle growth in the hindquarter was investigated by the arterio-venous difference (AVD) technique in Belgian Blue double-muscled type bulls at maintenance or at fattening. The bulls were fitted with an aortic ultrasonic blood flow probe and with catheters in the aorta and vena cava. They were offered a diet allowing for maintenance (MP) during a period of 15 d, at the end of which measurements were made over 3 d. Bulls were then given a fattening diet (FP) and the measurements were repeated. Arterial blood flow was approximately 1 L/min greater when the bulls were standing than when lying. Blood flow was 2 L/min higher during FP than during MP. The AVD and uptake of glucose were maximal at 1400 and 1600. Uptake of alpha-amino nitrogen decreased immediately after a meal. The increase in glucose from MP to FP fitted very well with the calculated energy needs for muscle growth. The AVD and uptake of alpha-amino nitrogen, total amino acids, and total nonessential amino acids were negative during MP and positive and significantly higher during FP. There was also a significant increase in AVD and uptake of essential and branched-chain amino acids when the bulls were changed from MP to FP. When changing from maintenance to fattening, the incremental glucose and amino acid hindquarter uptake provided energy and supply for muscle protein accretion, respectively. The level of alanine transamination was also sharply reduced. [less ▲]

Detailed reference viewed: 20 (1 ULg)
Full Text
Peer Reviewed
See detailA domain of TEL conserved in a subset of ETS proteins defines a specific oligomerization interface essential to the mitogenic properties of the TEL-PDGFR beta oncoprotein.
Jousset, C.; Carron, C.; Boureux, A. et al

in EMBO Journal (1997)

TEL is a novel member of the ETS family of transcriptional regulators which is frequently involved in human leukemias as the result of specific chromosomal translocations. This study shows that the amino ... [more ▼]

TEL is a novel member of the ETS family of transcriptional regulators which is frequently involved in human leukemias as the result of specific chromosomal translocations. This study shows that the amino-terminal domain conserved in a subset of the ETS proteins has evolved to generate a specialized protein-protein interaction interface which is likely to be an important determinant of their specificity as transcriptional regulators. [less ▲]

Detailed reference viewed: 6 (1 ULg)
Full Text
Peer Reviewed
See detailUnexpected Influence of a C-Terminal-Fused His-Tag on the Processing of an Enzyme and on the Kinetic and Folding Parameters
Ledent, Philippe; Duez, Colette ULg; Vanhove, Marc et al

in FEBS Letters (1997), 413(2), 194-196

The addition of a poly-His C-terminal extension, designed to facilitate the purification of the protein, to the beta-lactamase of a thermophilic Bacillus licheniformis strain modified the site of action ... [more ▼]

The addition of a poly-His C-terminal extension, designed to facilitate the purification of the protein, to the beta-lactamase of a thermophilic Bacillus licheniformis strain modified the site of action of the signal peptidase. This resulted in the secretion of a protein with a different N-terminus, showing that this type of protein engineering might not always be as 'neutral' as generally assumed. (C) 1997 Federation of European Biochemical Societies. [less ▲]

Detailed reference viewed: 74 (17 ULg)
Full Text
Peer Reviewed
See detailHiggs boson search at photon collider for M(h) = 140-GeV - 190-GeV
Ginzburg, I. F.; Ivanov, Igor ULg

in Physics Letters B (1997), 408

A Higgs boson within the mass range $M_H=140-190$ GeV can be discovered at a photon collider in the reaction $\gamma\gamma\to WW$ (with real or virtual W) with the luminosity integral about 1 fb$^{-1 ... [more ▼]

A Higgs boson within the mass range $M_H=140-190$ GeV can be discovered at a photon collider in the reaction $\gamma\gamma\to WW$ (with real or virtual W) with the luminosity integral about 1 fb$^{-1}$. The reasonable resolution in the effective mass of the WW system is required. [less ▲]

Detailed reference viewed: 9 (0 ULg)
Full Text
See detailLes peuplements à graines. Concept, réglementations et mise en oeuvre.
Vanslembrouck, C.; Rondeux, Jacques ULg

in Silva Belgica (1997), 104(4), 17-21

La rentabilité de la propriété forestière qui, dans une large mesure, conditionne la pérennité des forêts gérées intensivement fait de plus en plus l'objet des préoccupations des chercheurs, sylviculteurs ... [more ▼]

La rentabilité de la propriété forestière qui, dans une large mesure, conditionne la pérennité des forêts gérées intensivement fait de plus en plus l'objet des préoccupations des chercheurs, sylviculteurs, gestionnaires et responsables des politiques forestières. Dans ce contexte, lorsqu'il s'agit de la création et de l'enrichissement de peuplements, veiller à respecter la meilleure adéquation possible entre le sol et l'essence n'est pas tout, encore faut-il ensuite utiliser un matériel génétique de qualité en particulier lors de régénérations artificielles. C'est à ce dernier point, et plus particulièrement aux peuplements à graines, que les lignes suivantes sont consacrées. Nous envisagerons successivement ce qu'il convient communément d'entendre par peuplement à graines (§ 2), sa raison d'être (§ 3) et le processus d'identification de celui-ci (§ 4) avant de tirer quelques brèves conclusions. [less ▲]

Detailed reference viewed: 15 (4 ULg)
Full Text
Peer Reviewed
See detailSurveillance des états hypertensifs sévères
Brichant, Jean-François ULg

in Vaisseaux, Coeur, Poumons (1997), 2

Detailed reference viewed: 6 (4 ULg)
Peer Reviewed
See detailPhysical activity and cardiovascular risk factors in children. The Belgian Luxembourg Child Study.
Guillaume, Michèle ULg; Lapidus, L.; Bjorntorp, P.

in Obesity Research (1997)

Detailed reference viewed: 16 (0 ULg)
See detailL'AMDP appliqué à des réfugiés de Croatie
Mormont, Christian ULg

in Acta Psychiatrica Belgica (1997), 97(1), 55-60

Detailed reference viewed: 18 (0 ULg)
Full Text
Peer Reviewed
See detailProtéinas placentárias em mamíferos
Melo de Sousa, Noelita; de Figueiredo, José Ricardo; Gonçalves, Paulo Bayard Dias et al

in Ciência Animal (1997), 7(1), 43-55

During the past twenty years, several new placental proteins have been isolated and characterized in woman and several animal species. Among these proteins, it can be mentioned chorionic gonadotrophins ... [more ▼]

During the past twenty years, several new placental proteins have been isolated and characterized in woman and several animal species. Among these proteins, it can be mentioned chorionic gonadotrophins, placental lactogens, interferon tau, pregnancy specific and pregnancy-associated glycoproteins. In spite of the importance of these studies, there are few papers that describe fundamental aspects of these placental proteins such as physical-chemical pregnancy diagnosis methods. Thus, the aim of this report is to present an overview on the major aspects of placental proteins studied up to now, as well as to consider perspectives for their applications in the future in veterinary practice. [less ▲]

Detailed reference viewed: 63 (3 ULg)
Peer Reviewed
See detailToxicological investigations on four sperm whales stranded on the Belgian coast: inoganic contaminants
Bouquegneau, Jean-Marie ULg; Debacker, Virginie ULg; Gobert, Sylvie ULg et al

in Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre (1997), 67

Detailed reference viewed: 17 (3 ULg)
See detailDesodorisation des lisiers de porcs.
Thonart, Philippe ULg

in Agricontact (1997)

Detailed reference viewed: 3 (2 ULg)
See detailLe visage de l'Autre ou la conscience du regard
Mélon, Marc-Emmanuel ULg

in Revue belge du cinéma (1997), 41

Detailed reference viewed: 32 (2 ULg)
Full Text
Peer Reviewed
See detailAntitumor and radiosensitizing effects of (E)-2'-Deoxy-2'-(Fluoromethylene) cytidine, a novel inhibior of ribonucleotide diphosphate reductase on human colon carcinoma xenografts in nude mice.
Sun, Lin-Quan; Li, Ye-Xiong; Guillou, Louis et al

in Cancer Research (1997), 57

Antitumor and radiosensitizing effects of (E).2'-deoxy.2'-(fluromethyl ene) cytidine (FMdC), a novel inhibitor of ribonucleotide reductase, were evaluated on nude mice bearing s.c. xenografts and liver ... [more ▼]

Antitumor and radiosensitizing effects of (E).2'-deoxy.2'-(fluromethyl ene) cytidine (FMdC), a novel inhibitor of ribonucleotide reductase, were evaluated on nude mice bearing s.c. xenografts and liver metastases of a human colon carcinoma. FMdC given once daily or twice weekly has a dose-dependent antitumor effect. The maximum tolerated dose In the mice was reached with 10 mgi'kg applied daily over 12 days. Twice weekly administration of FMdC reduced its toxicity but lowered the antitumor effect. Treatment of preestablished liver micrometastases obtained via intrasplenic injection of tumor cells, with 5 or 10 mgfkg FMdC, signifi candy prolonged the survival of the mice as compared to controls (P < 0.025 and P < 0.001, respectively). Ten mg/kg resulted in longer survival than S mg/kg FMdC (P < 0.05). Radiotherapy alone of s.c. xenografts (10 fractions over 12 days) yielded the radiation dose required to produce local tumor control in 50% of the treated mice (TCD@O)of 43.0 Gy. When combined with FMdC, TCDsawas reduced to 22.5 and 19.0 Gy at doses of 5 and 10 mg/kg given i.p. 1 h before each irradiation, respec tively. The corresponding enhancement ratios were 1.91 and 2.43, respec lively. FMdC produced moderate and reversible myelosuppression. When 5 mg/kg FMdC was combined with irradiation, there was no increased skin or hematological toxicity as compared to radiotherapy or FMdC alone. At the 10 mg/kg level, however, lower leukocyte counts were observed. These results show that FMdC appears to be a potent anticancer drug and radiosensitizer [less ▲]

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detail- Purification and characterization of tomato leaf (Lycopersicon esculentum Mill.) hydroperoxide lyase.
Fauconnier, Marie-Laure ULg; Perez, A. G.; Sanz, C. et al

in Journal of Agricultural and Food Chemistry (1997), 45(11), 4232-4236

Hydroperoxide lyase (HPOOH lyase) was extracted from tomato leaves (Lycopersicon esculentum Mill.) and purified to apparent homogeneity by fractionated precipitation with polyethylene glycol 6000, ion ... [more ▼]

Hydroperoxide lyase (HPOOH lyase) was extracted from tomato leaves (Lycopersicon esculentum Mill.) and purified to apparent homogeneity by fractionated precipitation with polyethylene glycol 6000, ion exchange chromatography, and ultrafiltration. The enzyme is a trimer of 73 000 Da units with a molecular mass of 216 000 (determined by native-PAGE and gel filtration); its pI is around 4.9. Enzyme activity measurments realized with 9- and 13-hydroperoxides of linoleic acid (9-La OOH and 13-La OOH, respectively), R-linolenic acid (9-Ln OOH and 13-Ln OOH, respectively), and ç-linolenic acid (9-çLn OOH and 13-ç-Ln OOH, respectively) revealed a great affinity for 13-Ln OOH. The enzyme is rapidly inhibited by its substrate (13-Ln OOH), but preincubation with the other five hydroperoxides, which are not degraded by the enzyme, also resulted in activity inhibition. Dialysis could not restore the activity. When 13-Ln OOH is reduced in its corresponding alcohol or converted to its methyl ester, the inhibition is reduced. [less ▲]

Detailed reference viewed: 19 (4 ULg)
Peer Reviewed
See detailEffect of nadroparin, a low-molecular-weight heparin, on clinical and angiographic restenosis after coronary balloon angioplasty: the FACT study. Fraxiparine Angioplastie Coronaire Transluminale.
Lablanche, J. M.; McFadden, E. P.; Meneveau, N. et al

in Circulation (1997), 96(10), 3396-402

BACKGROUND: Experimental studies suggest that the antiproliferative effect of heparin after arterial injury is maximized by pretreatment. No previous studies of restenosis have used a pretreatment ... [more ▼]

BACKGROUND: Experimental studies suggest that the antiproliferative effect of heparin after arterial injury is maximized by pretreatment. No previous studies of restenosis have used a pretreatment strategy. We designed this study to determine whether treatment with nadroparin, a low-molecular-weight heparin, started 3 days before the procedure and continued for 3 months, affected angiographic restenosis or clinical outcome after coronary angioplasty. METHODS AND RESULTS: In a prospective multicenter, double-blind, randomized trial, elective coronary angioplasty was performed on 354 patients who were treated with daily subcutaneous nadroparin (0.6 mL of 10,250 anti-Xa IU/mL) or placebo injections started 3 days before angioplasty and continued for 3 months. Angiography was performed just before and immediately after angioplasty and at follow-up. The primary study end point was angiographic restenosis, assessed by quantitative coronary angiography 3 months after balloon angioplasty. Clinical follow-up was continued up to 6 months. Clinical and procedural variables and the occurrence of periprocedural complications did not differ between groups. At angiographic follow-up, the mean minimal lumen diameter and the mean residual stenosis in the nadroparin group (1.37+/-0.66 mm, 51.9+/-21.0%) did not differ from the corresponding values in the control group (1.48+/-0.59 mm, 48.8+/-18.9%). Combined major cardiac-related clinical events (death, myocardial infarction, target lesion revascularization) did not differ between groups (30.3% versus 29.6%). CONCLUSIONS: Pretreatment with the low-molecular-weight heparin nadroparin continued for 3 months after balloon angioplasty had no beneficial effect on angiographic restenosis or on adverse clinical outcomes. [less ▲]

Peer Reviewed
See detailLe rôle de l'expert
Boxho, Philippe ULg

in Société d'étude du dommage corporel (1997)

Detailed reference viewed: 35 (4 ULg)
Full Text
Peer Reviewed
See detailAutomatic external filling for the ion source gas bottle of a Van de Graaff accelerator
Bastin, Thierry ULg; Dehove, C.; Dumont, Paul-Dominique ULg et al

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (1997), 129

We describe a fully automatic system we developed to fill, from an external gas bottle, the ion sourer terminal gas storage bottle of a 2 MV Van de Graaff accelerator without depressing the 25 bar ... [more ▼]

We describe a fully automatic system we developed to fill, from an external gas bottle, the ion sourer terminal gas storage bottle of a 2 MV Van de Graaff accelerator without depressing the 25 bar insulating gas. The system is based on a programmable automate ordering electropneumatical valves. The only manual operation is the connection of the external gas cylinder. The time needed for a gas change is reduced to typically 15 min (depending on the residual pressure wished for the gas removed from the terminal bottle). To check this system we study the ionic composition of the ion beam delivered by our accelerator after different gas changes. The switching magnet of our accelerator was used to analyse the ionic composition of the accelerated beams in order to verify the degree of elimination of the previous gases in the system. (C) 1997 Elsevier Science B.V. [less ▲]

Detailed reference viewed: 44 (8 ULg)
Peer Reviewed
See detailThe Nucleotide Sequence Of Saccharomyces Cerevisiae Chromosome Xv
Dujon, B.; Albermann, K.; Aldea, M. et al

in Nature (1997), 387(6632),

Detailed reference viewed: 35 (2 ULg)
Peer Reviewed
See detailPromoter swapping between the genes for a novel zinc finger protein and beta-catenin in pleiomorphic adenomas with t(3;8)(p21;q12) translocations.
Kas, K.; Voz, Marianne ULg; Roijer, E. et al

in Nature Genetics (1997), 15(2), 170-4

Pleiomorphic adenoma of the salivary glands is a benign epithelial tumour occurring primarily in the major and minor salivary glands. It is by far the most common type of salivary gland tumour ... [more ▼]

Pleiomorphic adenoma of the salivary glands is a benign epithelial tumour occurring primarily in the major and minor salivary glands. It is by far the most common type of salivary gland tumour. Microscopically, pleiomorphic adenomas show a marked histological diversity with epithelial, myoepithelial and mesenchymal components in a variety of patterns. In addition to a cytogenetic subgroup with normal karyotypes, pleiomorphic adenomas are characterized by recurrent chromosome rearrangements, particularly reciprocal translocations, with breakpoints at 8q12, 3p21, and 12q13-15, in that order of frequency. The most common abnormality is a reciprocal t(3;8)(p21;q12). We here demonstrate that the t(3;8)(p21;q12) results in promoter swapping between PLAG1, a novel, developmentally regulated zinc finger gene at 8q12, and the constitutively expressed gene for beta-catenin (CTNNB1), a protein interface functioning in the WG/WNT signalling pathway and specification of cell fate during embryogenesis. Fusions occur in the 5'-non-coding regions of both genes, exchanging regulatory control elements while preserving the coding sequences. Due to the t(3;8)(p21;q12), PLAG1 is activated and expression levels of CTNNB1 are reduced. Activation of PLAG1 was also observed in an adenoma with a variant translocation t(8;15)(q12;q14). Our results indicate that PLAG1 activation due to promoter swapping is a crucial event in salivary gland tumourigenesis. [less ▲]

Detailed reference viewed: 17 (0 ULg)
Peer Reviewed
See detailManifestations indésirables des antidépresseurs
Charlier, Corinne ULg; Ansseau, Marc ULg; Pinto, Emmanuel ULg et al

in Toxicorama (1997), (Spécial LYON), 310-314

Detailed reference viewed: 10 (3 ULg)
Peer Reviewed
See detailDe quelques problèmes posés par l'action directe de l'article 1798 du Code civil, note sous Liège (10e ch.), 23 mai 1996
Georges, Frédéric ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (1997)

Detailed reference viewed: 25 (1 ULg)
See detailEtude radiographique des affections ostéo-articulaires juvéniles (AOAJ) chez des chevaux de races françaises âgés de 3 ans : présentation globale des résultats sur 761 sujets.
Denoix, JM; Valette, JP; Robert, C et al

in Bulletin de la Société Vétérinaire Pratique de France (1997)

Detailed reference viewed: 12 (3 ULg)
Full Text
Peer Reviewed
See detailThyroid hormone inhibits the human prolactin gene promoter by interfering with activating protein-1 and estrogen stimulations
Pernasetti, Flavia; Caccavelli, L.; Van de Weerdt, Cécile ULg et al

in Molecular Endocrinology (Baltimore, Md.) (1997), 11(7), 986-96

Transcription of the human PRL (hPRL) gene in the pituitary is subject to tissue-specific and multihormonal regulation involving two main regulatory regions, a proximal promoter and a distal enhancer. In ... [more ▼]

Transcription of the human PRL (hPRL) gene in the pituitary is subject to tissue-specific and multihormonal regulation involving two main regulatory regions, a proximal promoter and a distal enhancer. In this report we show that thyroid hormone inhibits the expression of the hPRL gene in rat pituitary cells. Transient expression experiments show that thyroid hormone regulation involves a strong inhibitory element, located in the proximal (-164/-35) promoter, which is modulated by a more distal stimulatory response control region. Gel retardation experiments reveal that the thyroid hormone receptor does not bind to the proximal negative element. We show the existence of an activating protein-1 (AP-1) response element located at positions -61 to -54 of the proximal promoter, conferring AP-1 stimulation to the hPRL promoter. This AP-1 induction is abolished when hormone-bound thyroid hormone receptor is present, indicating that there is an interference between the thyroid hormone receptor and AP-1 regulatory pathways. Furthermore, using the complete hPRL upstream region, we show that estrogen induction is abolished by simultaneous thyroid hormone treatment. [less ▲]

Detailed reference viewed: 16 (3 ULg)
Full Text
Peer Reviewed
See detailEfficiency and productivity of the insurance industry in the OECD countries
Fecher-Bourgeois, Fabienne ULg; Donni, Olivier

in Geneva Papers on Risk & Insurance - Issues & Practice (1997), 22(No. 85, October 1997), 523-535

Detailed reference viewed: 18 (5 ULg)
Full Text
Peer Reviewed
See detailQuelques arthropodes de nos maisons
Loneux, Michèle ULg

in Cahiers d'Ethologie (1997), 17(1), 75-124

Detailed reference viewed: 3 (0 ULg)
Full Text
Peer Reviewed
See detailDarkness promotes flowering in the absolute long-day requiring plant, Lolium temulentum L. Ceres
Périlleux, Claire ULg; Bernier, Georges ULg; Kinet, Jean-Marie

in Journal of Experimental Botany (1997), 48(307), 349--351

Vegetative plants of the long-day grass Lolium temulentum L. Ceres were exposed to threshold long days or light breaks. Protracted darkness given just afterwards clearly promoted flowering and was weakly ... [more ▼]

Vegetative plants of the long-day grass Lolium temulentum L. Ceres were exposed to threshold long days or light breaks. Protracted darkness given just afterwards clearly promoted flowering and was weakly inductive on its own. The promotive effect of darkness was restricted to floral induction since further apical development was weak. [less ▲]

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailSIME: A hybrid approach to fast transient stability assessment and contingency selection
Zhang, Ywee; Wehenkel, Louis ULg; Rousseaux, Patricia ULg et al

in International Journal of Electrical Power & Energy Systems (1997), 19(3), 195-208

We propose an integrated scheme for transient stability assessment which in a sequence screens contingencies and scrutinizes only the selected ones. This scheme is based on a hybrid method, called SIME ... [more ▼]

We propose an integrated scheme for transient stability assessment which in a sequence screens contingencies and scrutinizes only the selected ones. This scheme is based on a hybrid method, called SIME for Single Machine Equivalent. SIME relies on a particular direct method coupled with time-domain programs so as to combine the strengths of both, namely: the flexibility with respect to power system modelling of time-domain methods; the speed and richer information of the direct method. This paper lays the foundations of SIME, devises appropriate techniques for transient stability assessment per se and for contingency screening, and finally integrates these two techniques in a fully general function, i.e. able to comply with any power system modelling and stability scenario, and to assess any type of stability limits (critical clearing times or power limits). Throughout, real-world examples illustrate the proposed techniques and highlight their performances. [less ▲]

Detailed reference viewed: 34 (5 ULg)
Full Text
Peer Reviewed
See detailOrderly process of sequential cytokine stimulation is required for activation and maximal proliferation of primitive human bone marrow CD34+ hematopoietic progenitor cells residing in G0.
Ladd, A. C.; Pyatt, R.; GOTHOT, André ULg et al

in Blood (1997), 90(2), 658-68

Bone marrow (BM) CD34+ cells residing in the G0 phase of cell cycle may be the most suited candidates for the examination of cell cycle activation and proliferation of primitive hematopoietic progenitor ... [more ▼]

Bone marrow (BM) CD34+ cells residing in the G0 phase of cell cycle may be the most suited candidates for the examination of cell cycle activation and proliferation of primitive hematopoietic progenitor cells (HPCs). We designed a double simultaneous labeling technique using both DNA and RNA staining with Hoechst 33342 and Pyronin Y, respectively, to isolate CD34+ cells residing in G0(G0CD34+). Using long-term BM cultures and limiting dilution analysis, G0CD34+ cells were found to be enriched for primitive HPCs. In vitro proliferation of G0CD34+ cells in response to sequential cytokine stimulation was examined in a two-step assay. In the first step, cells received a primary stimulation consisting of either stem cell factor (SCF), Flt3-ligand (FL), interleukin-3 (IL-3), or IL-6 for 7 days. In the second step, cells from each group were washed and split into four or more groups, each of which was cultured again for another week with one of the four primary cytokines individually, or in combination. Tracking of progeny cells was accomplished by staining cells with PKH2 on day 0 and with PKH26 on day 7. Overall examination of proliferation patterns over 2 weeks showed that cells could progress into four phases of proliferation. Phase I contained cytokine nonresponsive cells that failed to proliferate. Phase II contained cells dividing up to three times within the first 7 days. Phases III and IV consisted of cells dividing up to five divisions and greater than six divisions, respectively, by the end of the 14-day period. Regardless of the cytokine used for primary stimulation, G0CD34+ cells moved only to phase II by day 7, whereas a substantial percentage of cells incubated with SCF or FL remained in phase I. Cells cultured in SCF or FL for the entire 14-day period did not progress beyond phase III but proliferated into phase IV (with <20% of cells remaining in phases I and II) if IL-3, but not IL-6, was substituted for either cytokine on day 7. G0CD34+ cells incubated with IL-3 for 14 days proliferated the most and progressed into phase IV; however, when SCF was substituted on day 7, cells failed to proliferate into phase IV. Most intriguing was a group of cells, many of which were CD34+, detected in cultures initially stimulated with IL-3, which remained as a distinct population, mostly in G0/G1, unable to progress out of phase II regardless of the nature of the second stimulus received on day 7. A small percentage of these cells expressed cyclin E, suggesting that their proliferation arrest may have been mediated by a cyclin-related disruption in cell cycle. These results suggest that a programmed response to sequential cytokine stimulation may be part of a control mechanism required for maintenance of proliferation of primitive HPCs and that unscheduled stimulation of CD34+ cells residing in G0 may result in disruption of cell-cycle regulation. [less ▲]

Detailed reference viewed: 15 (1 ULg)
Peer Reviewed
See detailEpilepsies rebelles de l'enfant: définition et modalités de prise en charge hospitalière
Leroy, Patricia; Dubru, Jean-Marie ULg; Misson, Jean-Paul ULg

in Neurone (1997), 2(8), 285-288

Detailed reference viewed: 40 (3 ULg)
Full Text
Peer Reviewed
See detailPalynological evaluation of the Famennian Protosalvinia (Foerstia) Zone in the Amazon basin, Northern Brazil : a preliminary study.
Loboziak; Melo, J.H.G.; Quadros, L.P. et al

in Review of Palaeobotany and Palynology (1997), 96

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailLoss of type IV collagen alpha 5 and alpha 6 chains in human invasive prostate carcinomas
Dehan, Pierre ULg; Waltregny, David ULg; Beschin, Alain et al

in American Journal of Pathology (1997), 151(4), 1097-104

Type IV collagen, a major component of basement membranes, is organized in a network responsible for the mechanical resistance of the basement membranes. It also plays a key role in epithelial cell ... [more ▼]

Type IV collagen, a major component of basement membranes, is organized in a network responsible for the mechanical resistance of the basement membranes. It also plays a key role in epithelial cell adhesion to basement membranes. This study was designed to investigate the distribution of type IV collagen alpha-chains in normal, preneoplastic, and malignant prostate basement membranes. For this purpose, immunohistochemistry using specific antibodies raised against the different alpha-chains of type IV collagen was performed in eight normal samples, six prostatic intraepithelial neoplasia, and 20 malignant lesions of the prostate. Our results demonstrate the presence of the "novel" alpha 5 (IV) and alpha 6 (IV) chains along with the "classical" alpha 1 (IV)/alpha 2 (IV) chains in the basement membrane of the normal prostate gland. The alpha 3 (IV) chain was never detected in any prostate specimen. Prostatic intraepithelial neoplasia showed a similar immunostaining pattern to that found in normal glands. In cancer gland basement membranes, we demonstrate for the first time a specific loss of the alpha 5 (IV) and alpha 6 (IV) chains, whereas the classical alpha 1 (IV) and alpha 2 (IV) chains were consistently exhibited. Additionally, type VII collagen colocalized with alpha 5 (IV) collagen chain, and these two proteins, which were always observed in normal and prostatic intraepithelial neoplasia gland basement membranes, were lost in invasive carcinoma basement membranes. This observation raises questions about the possible association or cooperation between alpha 5 (IV)/alpha 6 (IV) chains and anchoring fibrils in prostate glands basement membrane. [less ▲]

Detailed reference viewed: 32 (9 ULg)
Full Text
Peer Reviewed
See detailSpecific repertoire of olfactory receptor genes in the male germ cells of several mammalian species
Vanderhaeghen, P.; Schurmans, Stéphane ULg; Vassart, G. et al

in Genomics (1997), 39

Olfactory receptors constitute the largest family among G protein-coupled receptors, with up to 1000 members expected. We have previously shown that genes belonging to this family were expressed in the ... [more ▼]

Olfactory receptors constitute the largest family among G protein-coupled receptors, with up to 1000 members expected. We have previously shown that genes belonging to this family were expressed in the male germ line from both dog and human. We have subsequently demonstrated the presence of one of the corresponding olfactory receptor proteins during dog spermatogenesis and in mature sperm cells. In this study, we investigated whether the unexpected pattern of expression of olfactory receptors in the male germ line was conserved in other mammalian species. Using reverse transcription-PCR with primers specific for the olfactory receptor gene family, about 20 olfactory receptor cDNA fragments were cloned from the testis of each mammalian species tested. As a whole, they displayed no sequence specificity compared to other olfactory receptors, but highly homologous, possibly orthologous, genes were amplified from different species. Finally, their pattern of expression, as determined by RNase protection assay, revealed that many but not all of these receptors were expressed predominantly in testis. The male germ line from each mammalian species tested ins thus characterized by a specific repertoire of olfactory receptors, which display a pattern of expression suggestive of their potential implication in the control of sperm maturation, migration, or fertilization [less ▲]

Detailed reference viewed: 35 (2 ULg)
Full Text
Peer Reviewed
See detailDifferential expression of c-fos, Hsp70 and Hsp27 after photothrombotic injury in the rat brain.
Plumier, Jean-Christophe ULg; Armstrong, J. N.; Wood, N. I. et al

in Molecular Brain Research (1997), 45(2), 239-46

In situ hybridization and immunohistochemistry were used to examine the expression of c-fos, Hsp70 and Hsp27 following photothrombotic injury in the right fronto-parietal cortex of the rat. C-fos mRNA and ... [more ▼]

In situ hybridization and immunohistochemistry were used to examine the expression of c-fos, Hsp70 and Hsp27 following photothrombotic injury in the right fronto-parietal cortex of the rat. C-fos mRNA and protein were detected in the entire cerebral cortex on the lesioned side. Hsp70 mRNA accumulation was observed only adjacent and peripheral to the site of the lesion. At 1 h after photothrombotic injury, Hsp70 expression delineates the area of necrosis at 24 h after photothrombotic injury. Hsp27 protein was observed in the ipsilateral cerebral cortex with the exception of the deep layers of the cingulate cortex. In addition, while c-Fos immunoreactivity was localized in cell nuclei, Hsp27 immunoreactivity was detected in the cytoplasm of astrocytes. These results demonstrate that unilateral cortical injury induces changes in gene expression that vary according to cell type and brain region. [less ▲]

Detailed reference viewed: 14 (4 ULg)
Full Text
See detailPEGASE, une méthodologie et un outil de simulation prévisionnelle pour la gestion de la qualité des eaux de surface
Smitz, Joseph ULg; Everbecq, Etienne ULg; Deliège, Jean-François ULg et al

in Tribune de l'Eau (La) (1997), 50/4(588), 73-82

PEGASE (Planification Et Gestion de l’ASsainissement des Eaux) est un modèle intégré bassins hydrographiques/rivières développé à l’Aquapôle qui permet de calculer de façon déterministe et prévisionnelle ... [more ▼]

PEGASE (Planification Et Gestion de l’ASsainissement des Eaux) est un modèle intégré bassins hydrographiques/rivières développé à l’Aquapôle qui permet de calculer de façon déterministe et prévisionnelle la qualité des eaux des rivières en fonction des rejets et apports de pollution. PEGASE est un outil opérationnel permettant d’orienter les choix des opérateurs publics et privés en matière de gestion des eaux de surface à l’échelle des bassins versants [less ▲]

Detailed reference viewed: 214 (5 ULg)
Full Text
Peer Reviewed
See detailCombined Ring Inversion and Side Group Rotation in Geminal Diphosphoryl Substituted Pyrrolinoxyl Radicals: ESR Analysis of Chemical Exchange between Four Nonequivalent Sites
Rockenbauer, Antal; Mercier, Anne; Le Moigne, François et al

in Journal of Physical Chemistry A (1997), 101(43), 7965-7970

The ESR spectra of three diphosphorylated pyrrolidinoxyl radicals have been studied over a large temperature range. While for the trans 2,5-disubstituted compound 1 no line width alternation was found ... [more ▼]

The ESR spectra of three diphosphorylated pyrrolidinoxyl radicals have been studied over a large temperature range. While for the trans 2,5-disubstituted compound 1 no line width alternation was found, for the 2,2-disubstituted compounds 2 and 3, dramatic changes in the spectra were observed as a function of the temperature. These changes were explained by a four-site chemical exchange model including both ring inversion and hindered rotation around the carbon-phosphorus bonds. For radical 3, the presence of additional 5,5-dimethyl substitution can completely block rotations around carbon-phosphorus bonds for certain ring geometries, while for other ring conformations chemical exchange still occurs through combined inversionrotation processes. An effective two-site model composed of nonequivalent sites and a superposition model composed of a pair of exchanging conformers and a pair of nonexchanging conformers were used to simulate spectrum variations. A satisfactory fit was obtained over the entire temperature range investigated. From the temperature dependence of the exchange frequencies the potential barriers for ring inversion (27 kJ/mol), for combined inversion-rotation (11 kJ/mol), and for rotation around the carbon-phosphorus bonds (14 kJ/mol) were estimated. [less ▲]

Detailed reference viewed: 19 (2 ULg)
Peer Reviewed
See detailLe concept de qualité de vie
Etienne, Anne-Marie ULg; Fontaine, Ovide ULg

in Revue Francophone de Clinique Comportementale et Cognitive (1997), II(3), 16-25

Les auteurs examinent les problèmes rencontrés pour définir et mesurer la qualité de vie. Il se dégage des multiples définitions un ensemble de propriétés et de caractéristiques telles que la ... [more ▼]

Les auteurs examinent les problèmes rencontrés pour définir et mesurer la qualité de vie. Il se dégage des multiples définitions un ensemble de propriétés et de caractéristiques telles que la multifactorialité, l'auto-évaluation, la variabilité temporelle et la subjectivité. De plus, l'étude comparative des multiples outils existants devrait permettre d'affiner leur spécificité et donc aider à la compréhension du concept... [less ▲]

Detailed reference viewed: 184 (23 ULg)
Full Text
Peer Reviewed
See detailThe early stages of photosystem II assembly monitored by measurements of fluorescence lifetime, fluorescence induction and isoelectric focusing of chlorophyll-proteins in barley etiochloroplasts
MysliwaKurdziel, B.; Barthelemy, X.; Strzalka, K. et al

in Plant & Cell Physiology (1997), 38(11), 1187-1196

The relationship between functional and structural aspects of PSII formation during greening of etiolated barley leaves has been investigated using fluorescence life-time measurements, fluorescence ... [more ▼]

The relationship between functional and structural aspects of PSII formation during greening of etiolated barley leaves has been investigated using fluorescence life-time measurements, fluorescence kinetics analysis and analysis of chlorophyll-protein complexes by IEF-PAGE, Two phases of different character could be distinguished in the course of the greening process in dark-grown plants, An early phase covering the first 3-4 h after the onset of illumination and a late phase covering the subsequent greening, During the first phase the formation of PSII reaction centers and their minor antenna components was observed as manifested by the IEF-PAGE polypeptide pattern, This was accompanied by shortening of the slow and middle components of the fluorescence lifetime, as well as by the rapid drop in the amplitude of the slow component, A room temperature emission band at 676 nm was associated with uncoupled chlorophyll and with the slow fluorescence lifetime component during the first hours of greening. During the late greening phase peripheral light-harvesting complexes of PSII were formed concomitantly to an increase in lifetime and amplitude of the fast component and to a further decrease in the lifetime of the middle component, The gradual increase in PSII complexity during both phases of greening was also manifested by changes in proportion and kinetic properties of PSIIalpha and PSIIbeta units. Similar changes in fluorescence lifetime components as in the late greening of dark-grown plants were also observed in intermittent-light plants during continuous greening associated with the development of PSII antenna. The relationships between fluorescence lifetime characteristics and development of PSII are discussed in terms of a stepwise mechanism invoving a first step of Chl integration into small size PSII units followed by progressive increase of antenna size. [less ▲]

Detailed reference viewed: 6 (1 ULg)
Full Text
Peer Reviewed
See detailThree new species of Opegraphaceae (Lichens) from the Namib desert
Egea, J.M.; Sérusiaux, Emmanuël ULg; Torrente, Pilar et al

in Mycotaxon (1997), 61

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailPrimary radiation therapy or surgery combined or not to radiation therapy in the management of squamous cell carcinoma of the penis
Zouhair, Abderrahim; Ozsahin, Mahmut; Douglas, Pelham et al

in International Journal of Radiation, Oncology, Biology, Physics (1997), 39(2 (Supplément)), 295

Detailed reference viewed: 21 (2 ULg)
Peer Reviewed
See detailComparison between different methods of measurement of momentum and sensible heat fluxes over canopies.
Aubinet, Marc ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1997), 1(1),

Detailed reference viewed: 12 (2 ULg)