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See detailPrédiction de la composition de la carcasse et de la qualité de viande du Piétrain stress négatif par ultrasonographie en temps réel
Youssao, A. K. I.; Verleyen, Vincent ULg; Michaux, Charles ULg et al

in Annales de Médecine Vétérinaire (2003), 147(6), 403-410

The lean meat proportion and longissimus thoracis intramuscular fat percentage were predicted in negative-stress Pietrain pigs by real-time ultrasound using Pie Medical 200. The optimal probing site for ... [more ▼]

The lean meat proportion and longissimus thoracis intramuscular fat percentage were predicted in negative-stress Pietrain pigs by real-time ultrasound using Pie Medical 200. The optimal probing site for the estimation of carcass lean content percentage was first identified. The models for the prediction of carcass lean content proportion by ultrasound measurement were developed. Comparisons between Fat Lean Meter, ultrasonic device Piglog 105 and Pie Medical 200 were made for lean meat proportion estimation in Pietrain carcasses. The intramuscular fat percentage was predicted from the white pixel percentage in the longissimus thoracis ultrasound image [less ▲]

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See detailChanging concepts in plant hormone action
Gaspar, Thomas ULg; Kevers, Claire ULg; Faivre-Rampant, Odile et al

in In Vitro Cellular & Developmental Biology-Plant (2003), 39(2, MAR-APR), 85-106

A plant hormone is not, in the classic animal sense, a chemical synthesized in one organ, transported to a second organ to exert a chemical action to control a physiological event. Any phytohormone can be ... [more ▼]

A plant hormone is not, in the classic animal sense, a chemical synthesized in one organ, transported to a second organ to exert a chemical action to control a physiological event. Any phytohormone can be synthesized everywhere and can influence different growth and development processes at different places. The concept of physiological activity under hormonal control cannot be dissociated from changes in concentrations at the site of action, from spatial differences and changes in the tissue's sensitivity to the compound, from its transport and its metabolism, from balances and interactions with the other phytohormones, or in their metabolic relationships, and in their signaling pathways as well. Secondary messengers are also involved. Hormonal involvement in physiological processes can appear through several distinct manifestations (as environmental sensors, homeostatic regulators and spatio-temporal synchronizers, resource allocators, biotime adjusters, etc.), dependent on or integrated with the primary biochemical pathways. The time has also passed for the hypothesized 'specific' developmental hormones, rhizocaline, caulocaline, and florigen: root, stem, and flower formation result from a sequential control of specific events at the right places through a coordinated control by electrical signals, the known phytohormones and nonspecific molecules of primary and secondary metabolism, and involve both cytoplasmic and apoplastic compartments. These contemporary views are examined in this review. [less ▲]

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See detailCalculation of the scattering coefficient of a sine-shaped surface by using the BEM method
De Geetere, L.; Embrechts, Jean-Jacques ULg; Vermeir, G.

in Proceedings of the Institute of Acoustics (2003), 25(5), 75-83

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See detailBarotrauma-induced tension pneumoperitoneum.
Canivet, Jean-Luc ULg; Yans, Th; Piret, Sonia ULg et al

in Acta Anaesthesiologica Belgica (2003), 54(3), 233-6

We report the case of a massive tension-pneumoperitoneum developing immediately after starting mechanical ventilation (barotrauma). Careful analysis of CT-data provided meaningful informations in ... [more ▼]

We report the case of a massive tension-pneumoperitoneum developing immediately after starting mechanical ventilation (barotrauma). Careful analysis of CT-data provided meaningful informations in assessing the non surgical pulmonary source of pneumo peritoneum. [less ▲]

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See detailCarbohydrates and resistance to Phytophthora infestans in potato plants
Evers, Danièle; Dommes, Jacques ULg; Hausman, Jean-François

in Acta Physiologiae Plantarum (2003), 25(2), 171-178

Plants generally deal with biotic or abiotic stresses by altering components as for example cell wall constituents and metabolites. Infection by Phytophthora infestans, the causal agent of late blight ... [more ▼]

Plants generally deal with biotic or abiotic stresses by altering components as for example cell wall constituents and metabolites. Infection by Phytophthora infestans, the causal agent of late blight, constitutes a stress condition for the plants and they react to it with changes arising in their metabolism depending on the resistance level of the plants. The present work compares two potato hybrids differing in their level of horizontal resistance to late blight. Carbohydrate content in stems and leaves of infected and uninfected plants was determined by HPLC. Some carbohydrates accumulated in the stems of the resistant hybrid infected by P. infestans, whereas they remained unchanged in the susceptible hybrid. On the other hand, in the leaves, these carbohydrates accumulated only in the infected susceptible hybrid. [less ▲]

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See detailPreparation of nanosized barium zirconate powder by thermal decomposition of urea in an aqueous solution containing barium and zirconium, and by calcination of the precipitate
Boschini, Frédéric ULg; Robertz, B.; Rulmont, André ULg et al

in Journal of the European Ceramic Society (2003), 23(16), 3035-3042

The synthesis of barium zirconate was initiated by urea induced homogeneous precipitation followed by a "low temperature" thermal treatment. The kinetic of the reaction and the optimum urea/cation ratio ... [more ▼]

The synthesis of barium zirconate was initiated by urea induced homogeneous precipitation followed by a "low temperature" thermal treatment. The kinetic of the reaction and the optimum urea/cation ratio have been determined by means of X-ray diffraction and Inductive Coupled Plasma analyses. It has been demonstrated that an amorphous zirconium hydrated oxide starts to precipitate followed by the precipitation of barium carbonate. A calcination at 1200 degreesC during 2 h gives rise to the formation of a pure barium zirconate phase. Microstructural characterisations have been performed in order to evaluate the sintering behaviour. Dilatometric measurements, coupled with scanning electron microscopy analyses clearly indicate that barium carbonate decomposition process leads to the formation of internal porosity which severely limits the density of the material, even if a sintering was performed at 1500 degreesC. A careful control of the heating profile seems to be necessary in order to produce dense materials. (C) 2003 Elsevier Ltd. All rights reserved. [less ▲]

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See detailTierce décision obligatoire et violation d'une règle de procédure conventionnellement arrêtée par les parties
Caprasse, Olivier ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2003)

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See detailA note on the age of radioactive tracers
Delhez, Eric ULg; Deleersnijder, Eric; Mouchet, Anne ULg et al

in Journal of Marine Systems (2003), 38(3-4), 277-286

wThe age of a water mass is often estimated experimentally using the radio-age computed from the distribution of a radioactive tracer (radiocarbon, helium-tritium). Deleersnijder et al. [J. Mar. Syst. 28 ... [more ▼]

wThe age of a water mass is often estimated experimentally using the radio-age computed from the distribution of a radioactive tracer (radiocarbon, helium-tritium). Deleersnijder et al. [J. Mar. Syst. 28 (2001) 229.] have shown that the radio-age underestimates the age of the water and is larger than the age of the radioactive tracer used for its evaluation. This result is generalized here to radio-ages computed from the ratio of two radioactive tracers. The differences between the different ages are also studied analytically and numerically as functions of the decay rate of the radioactive tracers. For small decay rates, the difference between the age of the water mass and the radio-age is shown to be proportional to the decay rate. It depends also on the level of mixing in the system; even radioactive tracers with small decay rates can provide poor estimates of the age of the water mass in a strongly diffusive flow. For small half lives, both the radio-age and the age of radioactive tracers decrease as the inverse of the square root of the decay rate. The same analysis applies to some extent to the estimates of the age of a water mass from stable tracers with known time dependent sources (e.g. chloroflurocarbons). (C) 2002 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailSymetrie et reproductibilite temporelle des donnees neurographiques.
Bouquiaux, Olivier ULg; Horward, A.; Wang, François-Charles ULg

in Neurophysiologie Clinique = Clinical Neurophysiology (2003), 33(4), 185-95

The aims of the present study are to document side-to-side differences and temporal variability, between two trials (T1 and T2 at a time interval of 3 months) of nerve conduction measurements collected ... [more ▼]

The aims of the present study are to document side-to-side differences and temporal variability, between two trials (T1 and T2 at a time interval of 3 months) of nerve conduction measurements collected from 30 healthy subjects (mean age 22 +/- 2 years). METHODS: The protocol at T1 consisted of motor nerve conduction studies of median, ulnar, peroneal and tibial nerves bilaterally, with measurement of (a) motor response size (amplitude and area); (b) terminal latency; (c) minimal, mean and maximal F-wave latency; (d) motor conduction velocity; and (e) F-wave occurrence. T1 also involved sensory nerve conduction studies of median, ulnar, radial, lateral and medial cutaneous, sural and superficial peroneal nerves bilaterally, with measurement of sensory potential size (amplitude and area) and computation of sensory conduction velocity. The protocol at T2 consisted of identical measurements from the dominant side. RESULTS AND CONCLUSION: There was a negative relationship between the variability of parameters evaluating nervous conduction and the length of the nerve segment under study. Thus, the smallest side-to-side and temporal variabilities are measured for minimal F-wave latencies (on average 2-3%). The limits of symmetry and temporal variability are particularly useful for diagnosis of unilateral peripheral neuropathy or neurophysiological follow-up of patients with neuropathy, when the variability of the parameter under study is weak and when there is a high correlation between values recorded on the left and on the right or at T1 and T2. This was the case for motor response size of tibial and ulnar nerves, sensory potential size of radial nerve and minimal F-wave latencies from each studied motor nerve. [less ▲]

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See detailDie Medien der Germanistik und die Nöte des Nachwuchses
Pontzen, Alexandra ULg

in Jahrbuch der Deutschen Schillergesellschaft (2003), XLVII

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See detailProsthetic vascular infection complicated or not by aortoenteric fistula: comparison of treatment with and without cryopreserved allograft (homograft).
Lavigne, Jean-Paul ULg; Postal, Alain ULg; Kolh, Philippe ULg et al

in European Journal of Vascular and Endovascular Surgery (2003), 25(5), 416-23

OBJECTIVES: in patients with vascular prosthesis infection, to compare surgical outcome and long-term results of cryopreserved allograft implantations to conventional surgery. DESIGN: retrospective study ... [more ▼]

OBJECTIVES: in patients with vascular prosthesis infection, to compare surgical outcome and long-term results of cryopreserved allograft implantations to conventional surgery. DESIGN: retrospective study. MATERIAL AND METHODS: two asynchronous series of 44 [series I: 1980-1994; 8 patients with aortoenteric fistula (AEF)] and 22 (series II: 1994-1997; 4 patients with AEF) patients were treated for prosthesis infection. All patients had prosthesis excision. In series I, there were 4 in situ reparations, 26 extra-anatomic bypass, 13 excision only, and one death at laparotomy. In series II, in situ cryopreserved allografts were implanted in all patients. RESULTS: operative mortality was 16% in series I and 13.6% in series II. For AEF patients, mortality was 37% in series I and 50% in series II. Among hospital survivors, infection-related late mortality was 13.5% in series I and 5% in series II. For AEF patients, late mortality was 20% in series I and 50% in series II. Incidence of reoperations was 54% in series I and 10.5% in series II (p<0.01). Hospital stay was 47.2+/-26.4 days in series I and 16.6+/-11.5 days in series II (p<0.001). CONCLUSIONS: compared to conventional treatment, incidence of reoperations and length of hospital stay are significantly decreased after cryopreserved allograft implantation. However, closure of aortic stump and extra-anatomic bypass gives better results for patients with AEF. [less ▲]

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See detailVolumen-Flussmessung mit "Colour Velocity Imaging (CVI)": Technik der Messung in der intrahepatischen fetalen Vena umbilicalis
Chantraine, Frédéric ULg; Reihs, Tanja; Henrich, Wolfgang et al

in Zentralblatt für Gynakologie (2003), 125

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See detailLa participation du plaignant à la procédure en infraction au droit communautaire diligentée par la Commission
Munoz, Rodolphe ULg

in Revue du Marché Commun et de l'Union Européenne (2003), 472

La procédure en manquement est l’instrument principal de la Commission pour assurer que le droit communautaire est correctement mis en oeuvre au niveau national. La majorité des affaires, traitées dans le ... [more ▼]

La procédure en manquement est l’instrument principal de la Commission pour assurer que le droit communautaire est correctement mis en oeuvre au niveau national. La majorité des affaires, traitées dans le cadre de ce recours, a son origine dans les plaintes provenant de personnes physiques ou morale. Cependant, la Commission conserve un droit de regard important dans la mise en oeuvre de la procédure en manquement. En effet, elle est la seule à décider de l’opportunité d’ouvrir une procédure en manquement et peut à tout moment de la procédure décider d’arrêter les poursuites contre un Etat. Cette liberté s’explique par le fait que la Commission est une institution indépendante et représentant l’intérêt général communautaire. Cependant, il est logique que l’intérêt communautaire puisse ne pas coïncider avec l’intérêt des particuliers. Par conséquent, à plusieurs reprises les particuliers ont tenté de limiter ce pouvoir discrétionnaire de la Commission. Néanmoins, la Cour de justice a toujours refusé de remettre en cause ce pouvoir. Cette communication a pour but de clarifier les pouvoirs de la Commission. De fait, suite à une affaire portée devant le médiateur, la Commission s’est engagée à "codifier" les pratiques existantes afin que les plaignants connaissent l’ensemble des différents stades de la procédure. Ainsi, cette communication donne une vision globale de la gestion des plaintes par la Commission. [less ▲]

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See detailMarchés immobiliers résidentiels et étalement urbain contraint. L'accessibilité au logement au sein de la région métropolitaine bruxelloise
Dubois, O.; Halleux, Jean-Marie ULg

in Belgeo (2003), (3), 303-327

The release of mobility constraints has facilitated urban sprawl, i.e. the increasing spatial dissociation between urban cores and implantation sites of households and economic activities. The aim of this ... [more ▼]

The release of mobility constraints has facilitated urban sprawl, i.e. the increasing spatial dissociation between urban cores and implantation sites of households and economic activities. The aim of this paper about the Walloon part of the Brussels metropolitan region is to analyse how housing market constraints reinforce the trend towards residential sprawl. Based on an analysis of the financial accessibility to both, the market for new housings and the market for pre-existing housings, it is here the influence of the price level decreasing with the distance from Brussels which is taken into account. Due to their limited financial resources and to this price gradient, many households are obliged to settle on remote sites in order to acquire their property goods. In relation to this phenomenon, it appears that, from a spatial as well as from a social point of view, the Brussels urban system is not able to settle the metropolitan growth on an adapted way. Indeed, new residential locations reinforce the increasing dissociation between work places and living places, which leads to a useless increase in mobility costs as well as a serious accentuation of socio-spatial segregations. [less ▲]

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See detailIrritation cutanee et vitesse de propagation d'ondes ultrasonores.
Uhoda, Emmanuelle ULg; Pierard, Gérald ULg

in International Journal of Cosmetic Science (2003), 25(1-2), 31-5

Cutaneous irritation is a stereotyped response of the skin to any physical or chemical insult. Its main manifestations encompass inflammatory erythema and an alteration of the cutaneous microrelief ... [more ▼]

Cutaneous irritation is a stereotyped response of the skin to any physical or chemical insult. Its main manifestations encompass inflammatory erythema and an alteration of the cutaneous microrelief showing increased roughness, dehydration and erratic desquamation. Several instrumental methods can indirectly assess the issues of cutaneous irritation on human stratum corneum. The aim of the present study was to measure the speed of propagation of ultrasound shear waves in the skin irritated by anionic surfactants. The study was performed in 25 healthy subjects of both sexes. Occlusive patches of a 10% solution of anionic surfactants were applied to a forearm of each volunteer. The other forearm served as an untreated control site. Patches remained in place for 24 h. Three hours later, another patch was placed again for 21 h. Resonance running time measurements (RRTM) of the ultrasound shear wave were performed using a Reviscometer((R)) RVM 600. Measurements were performed at entry in the study and 2 days after removing the second patch. Desquamative xerosis was obvious at the sites patched with the surfactant solution. RRTM values were significantly (P < 0.0001) lower than those at the control site. Hence, the speed of propagation of ultrasound shear waves was shown to be increased at an irritated site compared to an intact site. In conclusion, this study shows that the propagation speed of ultrasounds is influenced by the skin surface nature, being considerably increased in skin altered by surfactants. [less ▲]

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See detailSeborrheic dermatitis today, gone tomorrow? The link between the biocene and treatment.
Pierard, Gérald ULg

in Dermatology : International Journal for Clinical & Investigative Dermatology (2003), 206(3), 187-8

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See detailP2X1-mediated ERK2 activation amplifies the collagen-induced platelet secretion by enhancing myosin light chain kinase activation.
Oury, Cécile ULg; Toth-Zsamboki, Emese; Cornelissen, Heidi et al

in Journal of Biological Chemistry (2003)

This study shows that, at low doses of collagen, glycoprotein VI activation leads to early protein kinase C- and MLC kinase-dependent platelet degranulation. Rapidly released ATP triggers P2X1 -mediated ... [more ▼]

This study shows that, at low doses of collagen, glycoprotein VI activation leads to early protein kinase C- and MLC kinase-dependent platelet degranulation. Rapidly released ATP triggers P2X1 -mediated Ca2+ influx, activating ERK2, in turn amplifying platelet secretion by reinforcing the early MLC kinase phosphorylation. Hence, the P2X1-ERK2-MLC axis contributes to collagen-induced platelet activation by enhancing platelet degranulation. [less ▲]

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See detailLe medicament du mois. Lowette, un contraceptif pour traiter l'acne de la jeune femme.
Goffin, Véronique ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2003), 58(4), 261-3

Acne is a multifactorial disorder affecting the vast majority of adolescents and young adults. Among the therapeutic armamentum, estroprogestative contraception can be offered to young women. The choice ... [more ▼]

Acne is a multifactorial disorder affecting the vast majority of adolescents and young adults. Among the therapeutic armamentum, estroprogestative contraception can be offered to young women. The choice must, however, be carefully targeted because the estroprogestative associations do not show similar anti-acne efficacy. A new contraceptive associating 20 micrograms of ethinyl estradiol and 100 micrograms of levonorgestrel (Lowette) has proven its clinical efficacy in this indication. [less ▲]

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See detailTierce décision obligatoire et motivation
Caprasse, Olivier ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2003)

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See detailLe pimecrolimus topique (Elidel).
Quatresooz, Pascale ULg; Fumal, I.; Pierard, Claudine ULg et al

in Revue Médicale de Liège (2003), 58(3), 168-71

Pimecrolimus inhibits some specific steps of the Th1 and Th2 immune reactions. It belongs to the class of ascomycin macrolactams. The topical drug formulation targets cutaneous inflammation, more ... [more ▼]

Pimecrolimus inhibits some specific steps of the Th1 and Th2 immune reactions. It belongs to the class of ascomycin macrolactams. The topical drug formulation targets cutaneous inflammation, more particularly lymphocytes and mast cells without impairing systemic immunosurveillance. Topical applications are indicated for treating atopic dermatitis. In this indication, it represents an alternative or an adjuvant drug to topical corticosteroids. The treatment of other dermatoses could also benefit from pimecrolimus. [less ▲]

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See detailCharacterization of hyperporous polyurethane-based gels by non-intrusive mercury porosimetry
Pirard, René ULg; Rigacci, Arnaud; Marechal, Jacqueline ULg et al

in Polymer (2003), 44(17), 4881-4887

Evaporative drying of polyurethane-based gels produces xerogels. Supercritical drying after replacement of interstitial liquid by supercritical CO2 produces aerogels. SEM micrographs show that both ... [more ▼]

Evaporative drying of polyurethane-based gels produces xerogels. Supercritical drying after replacement of interstitial liquid by supercritical CO2 produces aerogels. SEM micrographs show that both materials are made up of small size particles gathered up in filament-shaped, strongly cross-linked aggregates. Density measurements show that they both have a large pore volume. When submitted to mercury porosimetry, the behavior of these materials is similar to that of inorganic aerogels, as previously observed. Mercury does not penetrate the pore network, but the whole material is densified. The usual Washburn equation cannot be used to analyze the mercury porosimetry. A well-suited equation based on a buckling model of filament-shaped aggregates has been developed in order to determine the pore volume distribution of mineral dried gels. This equation is also valid for analyzing the texture of organic hyperporous materials like polyurethane dried nanoporous gel. (C) 2003 Elsevier Science Ltd. All rights reserved. [less ▲]

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See detailPour améliorer l'apprentissage d'une langue moderne à l'école primaire
Blondin, Christiane ULg; Straeten, M.

in Point sur la Recherche en Education (Le) (2003), 27

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See detailEvaluation des risques biomécaniques pour la colonne lombaire au moyen d'un questionnaire
Somville, Pierre-René ULg; Mairiaux, Philippe ULg

in Médecine du Travail & Ergonomie= Arbeidsgezondheidszorg & Ergonomie (2003), 40(1), 5-17

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See detailDevelopment Of Real-Time Rt-Pcr Assay For Detection Of Prunus Necrotic Ringspot Virus In Fruit Trees
Marbot, Sophie; Vendrame, Marina; Huwaert, Astrid et al

in Plant Disease (2003), 87(11), 1344-1348

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See detailWithin-herd effects of age at test day and lactation stage on test-day yields
Bormann, J.; Wiggans, G. R.; Druet, Tom ULg et al

in Journal of Dairy Science (2003), 86(11), 3765-3774

Variance ratios were estimated for random within-herd effects of age at test day and lactation stage, on test-day yield and somatic cell score to determine whether including these effects would improve ... [more ▼]

Variance ratios were estimated for random within-herd effects of age at test day and lactation stage, on test-day yield and somatic cell score to determine whether including these effects would improve the accuracy of estimation. Test-day data starting with 1990 calvings for the entire US Jersey population and Holsteins from California, Pennsylvania, Wisconsin, and Texas were analyzed. Test-day yields were adjusted for across-herd effects using solutions from a regional analysis. Estimates of the relative variance ( fraction of total variance) due to within-herd age effects were small, indicating that regional adjustments for age were adequate. The relative variances for within-herd lactation stage were large enough to indicate that accuracy of genetic evaluations could be improved by including herd stage effects in the model for milk, fat, and protein, but not for somatic cell score. Because the within-herd lactation stage effect is assumed to be random, the effect is regressed toward the regional effects for small herds, but in large herds, lactation curves become herd specific. Model comparisons demonstrated the greater explanatory power of the model with a within-herd-stage effect as prediction error standard deviations were greater for the model without this effect. The benefit of the within-herd-stage effects was confirmed in a random regression model by comparing variance components from models with and without random within-herd regressions and through log-likelihood ratio tests. [less ▲]

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See detailSkin weathering: the face at the interface.
Pierard, Gérald ULg

in Dermatology : International Journal for Clinical & Investigative Dermatology (2003), 207(3), 248-50

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See detailFinancement du terrorisme
Dantinne, Michaël ULg; Seron, Vincent ULg

in Revue de Droit Pénal et de Criminologie (2003), (6), 840-875

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See detailLes lymphomes
Jerusalem, Guy ULg; Hustinx, Roland ULg; Beguin, Yves ULg et al

in Médecine Nucléaire : Imagerie Fonctionnelle et Métabolique (2003), 27(8), 401-410

Actuellement, on arrive à guérir 70-80% des patients atteints de maladie de Hodgkin et 50% des patients atteints de lymphome non-Hodgkinien de malignité intermédiaire ou élevée. Une approche systématique ... [more ▼]

Actuellement, on arrive à guérir 70-80% des patients atteints de maladie de Hodgkin et 50% des patients atteints de lymphome non-Hodgkinien de malignité intermédiaire ou élevée. Une approche systématique concernant le diagnostic, la classification de la maladie et la détermination des facteurs pronostiques permet de choisir la thérapeutique la plus appropriée. Les auteurs passent en revue les examens à réaliser au diagnostic et discutent de la place de la tomographie à émission de positons (TEP) dans cette indication. Ils évoquent ensuite le problème des masses résiduelles. La TEP est maintenant l'examen de choix pour établir le bilan de fin de traitement. Les auteurs discutent également du rôle potentiel de la TEP pour l'évaluation thérapeutique précoce et le suivi régulier des patients après traitement pour lymphome. Enfin, l'aspect particulier des lymphomes de l'enfant est abordé. [less ▲]

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See detailResponsive corneosurfametry following in vivo skin preconditioning.
Uhoda, Emmanuelle ULg; Goffin, Véronique ULg; Pierard, Gérald ULg

in Contact Dermatitis (2003), 49(6), 292-6

Skin is subjected to many environmental threats, some of which altering the structure and function of the stratum corneum. Among them, surfactants are recognized factors that may influence irritant ... [more ▼]

Skin is subjected to many environmental threats, some of which altering the structure and function of the stratum corneum. Among them, surfactants are recognized factors that may influence irritant contact dermatitis. The present study was conducted to compare the variations in skin capacitance and corneosurfametry (CSM) reactivity before and after skin exposure to repeated subclinical injuries by 2 hand dishwashing liquids. A forearm immersion test was performed on 30 healthy volunteers. 2 daily soak sessions were performed for 5 days. At inclusion and the day following the last soak session, skin capacitance was measured and cyanoacrylate skin-surface strippings were harvested. The latter specimens were used for the ex vivo microwave CSM. Both types of assessments clearly differentiated the 2 hand dishwashing liquids. The forearm immersion test allowed the discriminant sensitivity of CSM to increase. Intact skin capacitance did not predict CSM data. By contrast, a significant correlation was found between the post-test conductance and the corresponding CSM data. In conclusion, a forearm immersion test under realistic conditions can discriminate the irritation potential between surfactant-based products by measuring skin conductance and performing CSM. In vivo skin preconditioning by surfactants increases CSM sensitivity to the same surfactants. [less ▲]

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See detailSkin immune dowregulators: from bench to bedside.
Pierard, Gérald ULg; Franchimont, Claudine ULg

in Current Topics in Pharmacology (2003), 7

New generations of topical skin immune downregulators (SIDRs) were recently introduced as an alternative to glucocorticoids for the topical treatment of some inflammatory dermatoses. Tacrolimus ... [more ▼]

New generations of topical skin immune downregulators (SIDRs) were recently introduced as an alternative to glucocorticoids for the topical treatment of some inflammatory dermatoses. Tacrolimus, pimecrolimus, sirolimus and dunaimycins inhibit the transcription of proinflammatory cytokine genes through binding to specific immunophilins. Taken together, SIDRs are able to inhibit a number of pro-inflammatory mediator systems and inflammatory cells with major importance for several cutaneous dermatitides. Therefore this group of compounds targeted dermatological diseases from the beginning of drug development. Several clinical trials have demonstrated the efficacy of tacrolimus and pimecrolimus in treating moderate to severe atopic dermatitis. Psoriasis, contact dermatitis and other dermatoses could also be indications for SIDRs. This review presents the cell biology changes and the mode of action of SIDRs. Their pharmacokinetics, clinical results and site effects are compared. [less ▲]

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See detailL'image du mois. Hématome hépatique après une réanimation cardio-pulmonaire
Delanaye, Pierre ULg; De Fooz, Geoffroy; NCHIMI LONGANG, Alain ULg et al

in Revue Médicale de Liège (2003), 58(7-8, Jul-Aug), 463-464

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See detailExperimental comparison of cavity sealing ability of five dental adhesive systems after thermocycling
Cao, L.; Geerts, Sabine ULg; Gueders, Audrey ULg et al

in Journal of Adhesive Dentistry (2003), 5(2, Summer), 139-144

Purpose: To evaluate the cavity sealing obtained after thermocycling with five adhesive systems in which one all-in-one adhesive was compared to three one-bottle adhesives, and to observe the effect of a ... [more ▼]

Purpose: To evaluate the cavity sealing obtained after thermocycling with five adhesive systems in which one all-in-one adhesive was compared to three one-bottle adhesives, and to observe the effect of a low-charged resin layer added to a one-bottle adhesive. Materials and Methods: Twenty-five recently extracted teeth were randomly allocated to five experimental adhesive systems (n = 5 each): Optibond Solo (OS), Scotchbond 1 (SB1), PQ 1, Prompt-L-Pop (PLP), SB1+Revolution (R). On each tooth, two rectangular cavities at the cementoenamel junction were filled with a microhybrid composite (Z100) and the tested adhesives. Teeth were thermocycled and stained with AgNO3 + vitamin C. Leakage was evaluated on a 6-point (0-5) severity scale and the highest score was selected for each restoration. Results were treated by ordinal logistic regression and considered to be significant at p < 0.05. Results: No significant difference was found between leakage values for enamel and dentin interfaces. Leakage scores never exceeded 2 for OS, SB1 and SB1+R, while they reached a maximum of 5 in 20% of PLP cases. OS was significantly better than the other adhesive systems, which were statistically equivalent. The addition of a flowable composite layer on SB1 did not yield a significant difference, but tended to give better results mainly at the dentin interface. Conclusion: The all-in-one adhesive PLP because of quite variable results, seems less reliable than the one-bottle adhesives, of which OS provides significantly the best results. Addition of a flowable composite on SB1 appears to yield slightly better results. [less ▲]

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See detailBiodiversity, molecular phylogeny, and trophodynamics of amphipod crustaceans in the Antarctic deep-sea
De Broyer, Claude; Dauby, Patrick ULg; Nyssen, Fabienne et al

in Berichte zur Polar- und Meeresforschung (2003), 470

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See detailLa guerre et la médecine d'une culture de paix. 5- Synopsis des armes non-létales.
Pierard, Gérald ULg

in FALCO (2003), Mars

Non lethal weapons may be harmful for people. The effects are accidental in some instances. For some weapons, they are clearly intentional. The eventuality of a fatal issue cannot be ruled out.

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See detailCTD measurements, with emphasis on Elephant Island surroundings
Dauby, Patrick ULg

in Berichte zur Polar- und Meeresforschung (2003), 470

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See detailAnalysis Of Accessible Surface Of Residues In Proteins
Lins, Laurence ULg; Thomas, Annick ULg; Brasseur, Robert ULg

in Protein Science : A Publication of the Protein Society (2003), 12(7),

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See detailModelling eutrophication in mesotidal and macrotidal estuaries. The role of intertidal seaweeds.
Alvera Azcarate, Aïda ULg; Ferreira, Joao; Nunes, Joao

in Estuarine Coastal & Shelf Science (2003), 57

The role of intertidal seaweeds in the primary production of mesotidal and macrotidal estuaries has been examined by means of a model, applied to the Tagus Estuary (Portugal). Special attention was paid ... [more ▼]

The role of intertidal seaweeds in the primary production of mesotidal and macrotidal estuaries has been examined by means of a model, applied to the Tagus Estuary (Portugal). Special attention was paid to the description of the underwater light climate in intertidal areas, and to the importance of the formation of tidal pools. Two approaches were compared for the simulation of suspended particulate matter (SPM) in the pool areas, using three algal species. The use of an erosion–deposition approach to simulate the distribution of SPM in tidal pools gives an increase in net primary productivity per unit area of between 130 and 1300%, when compared to the more conventional approach where the suspended matter in the overlying water in intertidal areas is considered identical to that in the channels. The upscaled erosion–deposition model was applied to tidal pool areas and combined with the more conventional model for other intertidal areas. Results show that annual carbon fixation by intertidal seaweeds in the estuary exceeds 13,500 t C yr−1, and accounts for 21% of the total carbon fixed by all primary producers. The corresponding nitrogen removal by seaweeds corresponds to the annual nutrient loading of a population of 490,000 inhabitants. [less ▲]

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See detailAndropause and psychopathology: minor symptoms rather than pathological ones.
Delhez, Marie; Hansenne, Michel ULg; Legros, Jean-Jacques ULg

in Psychoneuroendocrinology (2003), 28(7), 863-74

This study examined the psychological symptomatology of men diagnosed with andropause and the association between calculated free testosterone (T) and depressed mood, anxiety and quality of life. Subjects ... [more ▼]

This study examined the psychological symptomatology of men diagnosed with andropause and the association between calculated free testosterone (T) and depressed mood, anxiety and quality of life. Subjects were 153 men, aged 50-70 years, who participated in a screening of andropause. Total testosterone, FSH, LH and SHBG levels were measured. Depressed mood was assessed with the Carroll Rating Scale, anxiety with the "anxiety-insomnia" dimension of the General Health Questionnaire, and quality of life with the World Health Organisation Quality of Life questionnaire. The results showed that levels of free T decreased with age, whereas FSH and LH increased. Carroll Rating Scale scores were higher among hypogonadal subjects, but the mean score was low and not pathological. A negative correlation was observed between severity of depression as assessed by the Carroll Rating Scale and free T levels. However, subjects with a significant score on this scale did not exhibit different free T levels compared to subjects with a non-significant depressive score. Anxiety and quality of life did not differ between hypogonadal and eugonadal subjects. The present study therefore suggests that andropause is not characterised by specific psychological symptoms, but may be associated with "depressive symptoms" that are not considered as pathological. [less ▲]

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See detailCell Handling, Membrane-Binding Properties, And Membrane-Penetration Modeling Approaches Of Pivampicillin And Phthalimidomethylampicillin, Two Basic Esters Of Ampicillin, In Comparison With Chloroquine And Azithromycin
Chanteux, H.; Paternotte, I.; Mingeot-Leclercq, Mp. et al

in Pharmaceutical Research (2003), 20(4), 624-31

PURPOSE: The purpose of this work was to examine and understand the cellular pharmacokinetics of two basic esters of ampicillin, pivaloyloxymethyl (PIVA) and phthalimidomethyl (PIMA), in comparison with ... [more ▼]

PURPOSE: The purpose of this work was to examine and understand the cellular pharmacokinetics of two basic esters of ampicillin, pivaloyloxymethyl (PIVA) and phthalimidomethyl (PIMA), in comparison with lysosomotropic drugs (chloroquine, azithromycin). METHODS: Cell culture studies (J774 macrophages) were undertaken to study uptake and release kinetics and to assess the influence of concentration, pH, proton ionophore (monensin), and MRP and P-gp inhibitors (probenecid, gemfibrozil, cyclosporin A, GF 120918). Equilibrium dialysis with liposomes were performed to directly asses the extent of drug binding to bilayers. Conformational analysis modeling of the drug penetration in bilayers was conducted to rationalize the experimental observations. RESULTS: PIVA and PIMA showed properties in almost complete contrast with those of chloroquine and azithromycin, i.e., fast apparent accumulation and fast release at 4 degrees C as well as at 37 degrees C, saturation of uptake (apparent Kd 40 microM), no influence of monensin, MRP, or P-gp inhibitors; tight binding to liposomes (Kd approx. 40 microM); and sharp increase in calculated free energy when forced in the hydrophobic domain. CONCLUSIONS: Although they are weak organic bases, PIVA and PIMA show none of the properties of lysosomotropic agents. We hypothesize that they remain locked onto the pericellular membrane and may never penetrate cells as such in significant amounts. [less ▲]

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See detailCellular Uptake Of Antennapedia Penetratin Peptides Is A Two-Step Process In Which Phase Transfer Precedes A Tryptophan-Dependent Translocation
Dom, G.; Shaw-Jackson, C.; Matis, C. et al

in Nucleic Acids Research (2003), 31(2), 556-61

Several homeodomains and homeodomain-containing proteins enter live cells through a receptor- and energy-independent mechanism. Translocation through biological membranes is conferred by the third alpha ... [more ▼]

Several homeodomains and homeodomain-containing proteins enter live cells through a receptor- and energy-independent mechanism. Translocation through biological membranes is conferred by the third alpha-helix of the homeodomain, also known as Penetratin. Biophysical studies demonstrate that entry of Penetratin into cells requires its binding to surface lipids but that binding and translocation are differentially affected by modifications of some physico-chemical properties of the peptide, like helical amphipathicity or net charge. This suggests that the plasma membrane lipid composition affects the internalization of Penetratin and that internalization requires both lipid binding and other specific properties. Using a phase transfer assay, it is shown that negatively charged lipids promote the transfer of Penetratin from a hydrophilic into a hydrophobic environment, probably through charge neutralization. Accordingly, transfer into a hydrophobic milieu can also be obtained in the absence of negatively charged lipids, by the addition of DNA oligonucleotides. Strikingly, phase transfer by charge neutralization was also observed with a variant peptide of same charge and hydrophobicity in which the tryptophan at position 6 was replaced by a phenylalanine. However, Penetratin, but not its mutant version, is internalized by live cells. This underscores that charge neutralization and phase transfer represent only a first step in the internalization process and that further crossing of a biological membrane necessitates the critical tryptophan residue at position 6. [less ▲]

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See detailCombined enzymatic hydrolysis and HPAEC method for simultaneous analysis of galacturonic acid and neutral sugars of pectin.
Garna, H.; Mabon, N.; Wathelet, Bernard ULg et al

in Communications in Agricultural and Applied Biological Sciences (2003), 68(2 Pt A), 297-300

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See detailLe catastérisme chez Homère. Le cas d'Orion
Renaud, Jean-Michel ULg

in Gaia. Revue interdisciplinaire sur la Grèce archaïque (2003), 7

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See detailDiurnal Centroid Of Ecosystem Energy And Carbon Fluxes At Fluxnet Sites
Wilson, Kb.; Baldocchi, D.; Falge, E. et al

in Journal of Geophysical Research. Atmospheres (2003), 108(D21),

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See detailEnfin "Tubambe" devoile son identite! Hadraphe ethiopica (Bethune-Baker) (Limacodidae), une chenille comestible des forets claires zambeziennes.
Malaisse, François ULg; Demesmaecker, Anne; Matera, Joseph et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2003), 7(2), 67-77

La consommation humaine de chenilles de Limacodidae avait été signalée en Afrique centro-australe. L’une de ces espèces, Hadraphe ethiopica, a été déterminée. Des données relatives à sa biologie ont été ... [more ▼]

La consommation humaine de chenilles de Limacodidae avait été signalée en Afrique centro-australe. L’une de ces espèces, Hadraphe ethiopica, a été déterminée. Des données relatives à sa biologie ont été rassemblées. Des analyses d’échantillons séchés ont permis de préciser leur composition chimique et leur valeur nutritionnelle, notamment sur le plan des acides aminés et des acides gras. [less ▲]

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See detailDust-acoustic modes in plasmas with dust distributions and charge fluctuations
Verheest, F.; Jacobs, G.; Cattaert, Tom ULg

in New Journal of Physics (2003), 5

Charge fluctuations in dusty plasmas are discussed starting from charge, mass, momentum and current equations for the combined dusty plasma. This allows a generic description of low-frequency waves in ... [more ▼]

Charge fluctuations in dusty plasmas are discussed starting from charge, mass, momentum and current equations for the combined dusty plasma. This allows a generic description of low-frequency waves in plasmas with dust distributions, and leads to the damping and other modifications of the dust-acoustic and related modes, like generalized dust-Coulomb modes. [less ▲]

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See detailImbalance between lipoxin A(4) and leukotriene B-4 in chronic mastitis-affected cows
Boutet, Philippe ULg; Bureau, Fabrice ULg; Degand, Guy ULg et al

in Journal of Dairy Science (2003), 86(11), 3430-3439

Persistent accumulation of inflammatory cells in the udder, with neutrophils being the predominant cell type, is a characteristic feature of chronic mastitis in dairy cows. Leukotriene (LT) B-4 is a ... [more ▼]

Persistent accumulation of inflammatory cells in the udder, with neutrophils being the predominant cell type, is a characteristic feature of chronic mastitis in dairy cows. Leukotriene (LT) B-4 is a potent chemotactic agent, known to induce recruitment and accumulation of neutrophils in the bovine mammary gland. The LTB4-stimulated neutrophil functional responses are closely opposed by lipoxin (LX) A(4), which promotes the resolution of inflammation. We thus hypothesized that the chronic inflammation of the udder could be associated with an unfavorable ratio between these two eicosanoids and that the persistence of neutrophil accumulation could be due to an increase in LTB4 synthesis and/or an impaired LXA(4) production. In an attempt to verify this hypothesis, we first measured LXA(4), LTB4, and their ratio in the milk of healthy and acute and chronic mastitis-affected quarters. Next, we studied the relationships between these variables and the degree of udder inflammation as assessed by somatic cell count measurement. The LTB4 concentration was low in healthy quarters, drastically increased in acute mastitis, and reached intermediate levels in chronic mastitis-affected quarters. However, whereas LXA(4) concentration was highly increased in acute mastitis, healthy and chronic quarters had similarly low values. The LXA(4):LTB4 ratio was thus significantly lower in chronic mastitis-affected cows. The LTB4 concentrations measured in chronic quarters were highly correlated to somatic cell count and to milk neutrophil and macrophage numbers. A weaker correlation was observed between LXA(4) and these variables. For both eicosanoids, the highest correlation was observed with the number of neutrophils. These results show the existence of an LXA(4):LTB4 imbalance in chronic mastitis-affected cows because of low LXA(4) concentrations. Further studies are needed to determine whether administration of LX or stable analogs could have therapeutic potential in the control of chronic bovine mastitis. [less ▲]

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See detailCreolization in Robert Antoni's Blessed Is the Fruit: A Linguistic Analysis
Ledent, Bénédicte ULg

in Matatu : Journal for African Culture and Society (2003), 27-28

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See detailHigh-Performance Liquid Chromatography Analyses Of Pyoverdin Siderophores Differentiate Among Phytopathogenic Fluorescent Pseudomonas Species
Bultreys, Alain; Gheysen, Isabelle; Wathelet, Bernard ULg et al

in Applied and Environmental Microbiology (2003), 69(2),

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See detailA retrospective study of non-specific rhinitis in 22 cats and the value of nasal cytology and histopathology
Michiels, L.; Day, M. J.; Snaps, Frédéric ULg et al

in Journal of Feline Medicine and Surgery (2003), 5(5), 279-285

Case records from 40 cats subjected to rhinoscopic examination for investigation of chronic nasal disease were reviewed. Cases in which no specific underlying cause (eg neoplasia) was detected were ... [more ▼]

Case records from 40 cats subjected to rhinoscopic examination for investigation of chronic nasal disease were reviewed. Cases in which no specific underlying cause (eg neoplasia) was detected were further selected for detailed retrospective study. In these 22 cats (55% of the initial population), a final diagnosis of non-specific chronic nasal disease was made. The radiographic, rhinoscopic, cytological and histopathological findings were reviewed. Mucosal biopsy specimens were obtained in 20 cases. Despite clinical signs of more than 4 weeks duration, histopathology indicated acute inflammation in four cases. Two cases had chronic lymphoplasmacytic inflammation and 14 had mixed (lymphoplasmacytic and neutrophilic) inflammation. Specimens for cytology were obtained from 17 cases by brush sampling. Three of these samples were not diagnostic due to the poor quality of the slides; one showed normal cytology. Acute inflammation was diagnosed by cytology (n = 11) more commonly than chronic (n = 1) or mixed inflammation (n = 1). Concurrent samples, of quality suitable for both histopathological and cytological interpretation, were collected from 12 cases only. Cytological results were in agreement with the histological results in 25%, of these cases, the main discrepancy being the nature of the dominant inflammatory cell type. Therefore cytology does not appear to be a reliable means for detection of chronic inflammation. Further studies are needed in order to investigate the correlation between the nature of mucosal inflammation as defined by both histological and cytological evaluation, and the relationship of these test results to prognosis and therapy. (C) 2003 Published by Elsevier Ltd on behalf of ESFM and AAFP. [less ▲]

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See detailEmile Adan en de introductie van reisinstructies voor de Belgische wetenschappelijke exploratie in Midden-Afrika.
Vandersmissen, Jan ULg

in Archives et Bibliothèques de Belgique = Archief en Bibliotheekwezen in Belgie (2003), 74(1-4), 205-217

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See detailPatterns Of Bryophyte Diversity And Rarity At A Regional Scale
Vanderpoorten, Alain ULg; Engels, Patrick ULg

in Biodiversity & Conservation (2003), 12(3),

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See detailThe family systems approach to treating families of persons with brain injury: a potential collaboration between family therapist and brain injury professional
Laroi, Frank ULg

in Brain Injury (2003), 17

Although brain injury may have a great impact on the family as a whole, family reactions are not adequately addressed in rehabilitative programmes. When they are, treatment tends to be approached from a ... [more ▼]

Although brain injury may have a great impact on the family as a whole, family reactions are not adequately addressed in rehabilitative programmes. When they are, treatment tends to be approached from a family education and support perspective and not from a family therapy perspective. The aim of the following paper is to illustrate the important role that a family systems approach can play in treating families of individuals with brain injury. In particular, clinical examples taken from the literature will be presented that illustrate how family roles can be modified as a consequence of a brain injury, and the importance of re-establishing or re-distributing these roles. It will be argued that an intimate collaboration between family therapist and brain injury professional is essential, and that the ideal professional make-up of clinicians working with families of persons with brain injury are those well-versed in both brain injury rehabilitation and family therapy. [less ▲]

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See detailCloches et plaies des pieds.
Crosset, A.; Uhoda, Emmanuelle ULg; Pierard, Gérald ULg

in Pharma-Sphère (2003), 78

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See detailAnalyses technologiques d'un atelier de taille aurignacien à Maisières - Canal (Province du Hainaut, Belgique)
Miller, Rebecca ULg; Flas, Damien; Guillaume, Alain et al

in Notae Praehistoricae (2003), 23

This articles presents the results of the spatial distribution of lithic refits and a dynamic technological analysis of the Aurignacian assemblage from the site of Maisières-Canal.

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See detailAtypical recurrent varicella in 4 patients with hemopathies.
Nikkels, Arjen ULg; Simonart, Thierry; Kentos, Alain et al

in Journal of the American Academy of Dermatology (2003), 48(3), 442-7

Relapsing varicella may occur in children with HIV infection and more rarely in younger adults. Our aim was to report unusual clinical, histologic, and virologic aspects of 4 elderly patients with ... [more ▼]

Relapsing varicella may occur in children with HIV infection and more rarely in younger adults. Our aim was to report unusual clinical, histologic, and virologic aspects of 4 elderly patients with malignant hemopathies who had an unusual form of recurrent varicella develop. Conventional microscopy, immunohistochemistry, and in situ hybridization were applied to smears and skin biopsy specimens. The patients presented a few dozen, scattered, large, papulovesicular lesions with central crusting. No zoster-associated pain or dermatomal distribution of the lesions was noted. Conventional microscopy revealed vascular changes and epidermal alterations typical for alpha-herpes virus infection. The varicella zoster virus major viral envelope glycoproteins gE and gB, and the immediate-early varicella zoster virus IE63 protein and the corresponding genome sequence for gE were detected on Tzanck smears; they were localized in endothelial cells and keratinocytes on skin biopsy specimens. The varicella zoster virus infection in endothelial cells, the vascular involvement, and the widespread distribution of the lesions suggest that the reported eruptions are vascular rather than neural in origin. These findings invalidate the diagnosis of herpes zoster but strongly support the diagnosis of recurrent varicella in an indolent and yet unreported presentation. Furthermore, these eruptions differ from relapsing varicella in children and young adults by the age of the patients, the paucity of clinical lesions, the larger diameter of the lesions and their peculiar clinical aspect, the significantly longer time interval between primary varicella and the recurrence, the prolonged healing time of the lesions, their mild disease course, and the fact that all the lesions are in the same stage of development. [less ▲]

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See detailThe course of some bone remodelling plasma metabolites in healthy horses and in horses offered a calcium-deficient diet.
de Behr, V.; Daron, D.; Gabriel, Annick ULg et al

in Journal of Animal Physiology & Animal Nutrition (2003), 87(3-4), 149-59

An inquiry was carried out to assess the concentrations of plasma metabolites related to bone remodelling in 21 saddle horses of Warmblood breed aged 4-26 years, five draught horses of Ardennes breed aged ... [more ▼]

An inquiry was carried out to assess the concentrations of plasma metabolites related to bone remodelling in 21 saddle horses of Warmblood breed aged 4-26 years, five draught horses of Ardennes breed aged 4-10 years, and 10 Ardennes foals aged 9-11 months. They were fed according to normal feeding practice in Belgium. The changes in some bone remodelling plasma metabolite concentrations were studied when an unbalanced diet was offered and later corrected for four Warmblood horses. Bone formation was evaluated by bone alkaline phosphatase (BALP), total alkaline phosphatase (TALP) and osteocalcin (bone gla-protein, OC). Bone resorption was assessed by hydroxyproline (HYP). Total calcium, ionized calcium, phosphorus (P) and 25-hydroxyvitamin D3 [25-(OH)D] concentrations were more or less constant. The comparison of four bone remodelling factors between the Ardennes and Warmblood horses showed higher concentrations in the Ardennes breed. Bone marker concentrations decreased according to age. The correction of the unbalanced Ca : P diet induced inconsistent effects at plasma level. The interpretation of the different bone parameters appeared to be difficult if not associated with other parameters such as a complete anamnesis and clinical examination of the animal in addition to dietary evaluation. [less ▲]

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See detailSynopsis des dermatomycoses invasives chez l'immunodéprimé.
Quatresooz, Pascale ULg; Arrese Estrada, Jorge ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2003), 58(11), 690-4

The immune system plays a prominent role in the defense against a wide variety of pathogen fungi. Thus, the immunocompromised patient becomes a potential victim of mycoses originating from the skin. These ... [more ▼]

The immune system plays a prominent role in the defense against a wide variety of pathogen fungi. Thus, the immunocompromised patient becomes a potential victim of mycoses originating from the skin. These mycoses may become invasive and a fatal issue is possible. In other circumstances, the inoculation site is pulmonary or digestive, and the cutaneous lesions represent secondary localizations. [less ▲]

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See detailAlcoolisme ou aldehydisme : Role de l'acetaldehyde dans les effets psychotropes de l'alcool
Quertemont, Etienne ULg

in Alcoologie et Addictologie (2003), 25(1), 33-39

De récentes études ont suggéré que l’acétaldéhyde, premier produit du métabolisme de l’éthanol, participe aux effets psychotropes résultant de la consommation d’alcool. L’acétaldéhyde semble ... [more ▼]

De récentes études ont suggéré que l’acétaldéhyde, premier produit du métabolisme de l’éthanol, participe aux effets psychotropes résultant de la consommation d’alcool. L’acétaldéhyde semble particulièrement impliqué dans les effets renforçants de l’éthanol, ce qui suggère un rôle important pour ce métabolite dans l’abus d’alcool et l’alcoolisme. Cette mise au point passe en revue les preuves expérimentales qui tendent à démontrer le rôle de l’acétaldéhyde dans les effets psychotropes de l’alcool. Les études animales et humaines indiquent que l’acétaldéhyde exerce une action renforçante plus puissante que l’éthanol dans le cerveau. Au contraire, il semble que l’accumulation d’acétaldéhyde dans le sang périphérique provoque des effets désagréables et une aversion pour l’alcool. Les effets hédoniques de l’acétaldéhyde seraient donc déterminés par le lieu, central ou périphérique, de son accumulation principale. Toutefois, l’acétaldéhyde ne doit pas être considéré comme le seul principe actif responsable de tous les effets psychotropes de l’éthanol. Plusieurs études ont par exemple démontré que l’acétaldéhyde ne participe pas significativement aux effets subjectifs de l’éthanol. Si l’acétaldéhyde exerce effectivement un rôle dans les effets renforçants de l’éthanol, il ne doit donc pas être tenu pour responsable de tous les effets pharmacologiques de la consommation d’alcool. [less ▲]

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See detailInorganic and organic carbon biogeochemistry in the Gautami Godavari estuary (Andhra Pradesh, India) during pre-monsoon : the local impact of extensive mangrove forests
Bouillon, Steven; Frankignoulle, Michel; Dehairs, Frank et al

in Global Biogeochemical Cycles (2003), 17(4),

[1] The distribution and sources of organic and inorganic carbon were studied in the Gautami Godavari estuary (Andhra Pradesh, India) and in a mangrove ecosystem in its delta during pre-monsoon. In the ... [more ▼]

[1] The distribution and sources of organic and inorganic carbon were studied in the Gautami Godavari estuary (Andhra Pradesh, India) and in a mangrove ecosystem in its delta during pre-monsoon. In the oligohaline and mesohaline section (salinity 0–15) of the estuary, internal production of total alkalinity (TAlk) and dissolved inorganic carbon (DIC) was recorded, and the d13CDIC profile suggests that carbonate dissolution may be an important process determining the DIC dynamics in this section of the Godavari. The partial pressure of CO2 (pCO2) was fairly low along the entire salinity gradient, (293–500 ppm), but much higher and more variable (1375–6437 ppm) in the network of tidal mangrove creeks in the delta. Here, variations in the concentration and d13C of the DIC pool were shown to result largely from the mineralization of organic matter. The present study clearly identifies the mangrove creeks as an active site of mineralization and CO2 efflux to the atmosphere, but shows that these changes in the aquatic biogeochemistry are a localized feature, rapidly fading in the adjacent Kakinada Bay. Our data indicate that mineralization of dissolved organic carbon (DOC) of mangrove origin, and its subsequent efflux as CO2 to the atmosphere may represent an important fate for mangrove carbon. Although further quantification of this process in a variety of systems is required, we suggest that some of the current ideas on the role of mangroves in the carbon budget of the coastal zone may need to be reconsidered. [less ▲]

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See detailMycotoxins in stored Barley (Hordeum vulgare) in Tibet Autonomous Region (People’s Republic of China.
Haubruge, Eric ULg; Chasseur, Camille

in Mountain Research & Development (2003), 23

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See detailLombalgies et remise au travail : Quel modèle d'intervention privilégier ?
Mairiaux, Philippe ULg

in Médecine du Travail & Ergonomie= Arbeidsgezondheidszorg & Ergonomie (2003), XL(4), 185-188

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See detailCalibration of ion effective temperatures achieved by resonant activation in a quadrupole ion trap
Gabelica, Valérie ULg; Karas, Michael; De Pauw, Edwin ULg

in Analytical Chemistry (2003), 75(19), 5152-5159

The present paper describes a calibration of the ion effective temperatures as a function of the resonant activation amplitude in a quadrupole ion trap mass spectrometer. MS/MS experiments are performed ... [more ▼]

The present paper describes a calibration of the ion effective temperatures as a function of the resonant activation amplitude in a quadrupole ion trap mass spectrometer. MS/MS experiments are performed on leucine enkephalin (M + H)(+), bradykinin (M + H)(+), (M + 2H)(2+), and (M + 3H)(3+), and ubiquitin (M + 11H)(11+). For each amplitude, the effective temperature is calculated as the temperature that would give the same dissociation rate constant as the one observed and is calculated using published Arrhenius parameters. The effective temperature is found to be linearly dependent on the activation amplitude on the range investigated. The dependence of the slope and of the intercept of the T-eff = f (amplitude) functions on the parent ion m/z is examined and an equation is derived to calibrate the ion effective temperature between 365 and 600 K Below 365 K, a deviation from linearity is expected. Above 600 1 the validity of the equation will depend on whether the rapid energy exchange limit is still reached. Calculating backward, the Arrhenius parameters from the measured dissociation rates using this calibration show excellent agreement with the published values. The calibration can therefore be used to determine Arrhenius activation parameters from dissociation kinetics under resonant activation in quadrupole ion trap mass spectrometers. [less ▲]

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See detailAlzheimer' Disease as a Disconnection Syndrome?
Delbeuck, Xavier; Van der Linden, Martial ULg; Collette, Fabienne ULg

in Neuropsychology Review (2003), 13(2), 79-92

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See detailRhinitis/Bronchopneumonia syndrome in Irish Wolfhounds.
Clercx, Cécile ULg; Reichler, I.; Peeters, Dominique ULg et al

in Journal of Veterinary Internal Medicine (2003), 17(6), 843-9

This study describes the clinical, immunologic, genetic, and pathologic features of Irish Wolfhounds with rhinitis/bronchopneumonia syndrome. The dogs examined were from Belgium, The Netherlands, UK ... [more ▼]

This study describes the clinical, immunologic, genetic, and pathologic features of Irish Wolfhounds with rhinitis/bronchopneumonia syndrome. The dogs examined were from Belgium, The Netherlands, UK, Canada, Germany, and Switzerland. Signs included transient to persistent mucoid or mucopurulent rhinorrhea, cough, and respiratory dyspnea. Radiographic, rhinoscopic, and bronchoscopic findings were variable. Analysis of ciliary ultrastructure was performed in 5 affected dogs, but no characteristic primary ciliary defects (primary ciliary dyskinesia) were detected. Serum and bronchoalveolar lavage fluid (BALF) concentrations of IgA, IgG, and IgM were determined in some affected dogs and clinically normal Irish Wolfhounds. Serum IgA concentration was below the reference range in 5 of 8 affected dogs tested, whereas BALF IgA concentration was above the normal range in 2 affected adult dogs. The CD4 to CD8 lymphocyte subset ratio (CD4:CD8) in peripheral blood was tested in 3 affected dogs and was within the normal range. BALF CD4:CD8 was tested in 1 affected dog and was higher than the normal range. Decreased neutrophil phagocytosis was observed in 1 of the 4 dogs tested. Analysis of pedigrees of the Belgian, Canadian, German, and Swiss dogs revealed common ancestry, suggesting a heritable syndrome. [less ▲]

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See detailLe vers contemporain : recherches et innovations en France dans les années 80 et 90
Purnelle, Gérald ULg

in Formes poétiques contemporaines (2003), 1

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See detailLe cancer medullaire de la thyroide ou, comment des marqueurs tumoraux et les outils de la genetique autorisent le deploiement de mesures preventives.
Meurisse, Nicolas ULg; Defechereux, Thierry ULg; Hamoir, Etienne ULg et al

in Revue Médicale de Liège (2003), 58(5), 346-350

Medullary thyroid cancer (MTC) arises from parafollicular C cells secreting calcitonin. MTC occurs both as sporadic tumors and as part of specific inherited autosomal dominant syndromes in which point ... [more ▼]

Medullary thyroid cancer (MTC) arises from parafollicular C cells secreting calcitonin. MTC occurs both as sporadic tumors and as part of specific inherited autosomal dominant syndromes in which point mutations within a discrete set of RET codons were described. Total thyroidectomy and aggressive neck dissection represents the only chance for cure in the affected patients. Therefore, all patients with thyroid nodular disease should undergo measurement of calcitonin plasma levels to allow preclinical diagnosis of the disease and early appropriate surgery ("secondary prevention"). In case of proband patient for inherited disease, all the family members should be genetically screened to detect the disease gene carriers. Patients with germline mutation would benefit either from earlier surgery at the stage of C-cell hyperplasia or microcarcinoma or prophylactic surgery (total thyroidectomy without neck dissection) (primary prevention) before the onset of any C-cells pathology. The ideal age for performance of such prophylactic surgery is determined by the genotypic features of the disease. [less ▲]

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See detailPhylogeny
Baudoin, Jean-Pierre ULg; Maquet, A.

in Plant and Soil (2003), 252(1), 55-128

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See detailTrou Al'Wesse : Rapport préliminaire des fouilles 2003
Miller, Rebecca ULg; Otte, Marcel ULg

in Notae Praehistoricae (2003), 23

This article presents a summary of the first field season of the second phase of excavations at the site of Trou Al'Wesse as well as proposing a series of hypotheses concerning possible contacts between ... [more ▼]

This article presents a summary of the first field season of the second phase of excavations at the site of Trou Al'Wesse as well as proposing a series of hypotheses concerning possible contacts between Mesolithic and Neolithics populations. [less ▲]

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See detailZur diatopischen Gliederung des alltagssprachlichen Wortgebrauchs
Möller, Robert ULg

in Zeitschrift für Dialektologie und Linguistik (2003), 70

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See detailSapling diversity in canopy gaps in an Ecuadorian rain forest.
Salvador-Van Eysenrode, D; Bogaert, Jan ULg; Zak-Mnacek, V et al

in Forest Science (2003), 49(6), 909-917

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See detailLe Gigantisme : Un mystère élucidé
Beckers, Albert ULg

in Revue Roumaine d'Endocrinologie (2003), 2(4), 88-9394-97

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See detailReich-Ranicki und die ‚Erotik'. In: Das Internet-Portal Marcel Reich-Ranicki
Pontzen, Alexandra ULg

in Literaturkritik.de (2003)

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See detailPrevention de la fracture de la hanche chez le sujet age: ou en sommes-nous en 2003?
Reginster, Jean-Yves ULg; Lecart, Marie-Paule ULg; Sarlet, Nathalie ULg et al

in Revue Médicale de Liège (2003), 58(4), 183-90

Osteoporosis in very elderly subjects is now considered, in most developed and several developing countries as a major social, clinical and financial burden. While many compounds have been investigated in ... [more ▼]

Osteoporosis in very elderly subjects is now considered, in most developed and several developing countries as a major social, clinical and financial burden. While many compounds have been investigated in the prevention or treatment of spinal fractures, few of them have unequivocally demonstrated their ability to reduce the risk of non vertebral and more specifically hip fractures in the very elderly. This situation may seem highly paradoxical since hip fractures are unanimously considered to be the most dramatic and disabling consequence of osteoporosis. The present article reviews the current evidence available to justify anti-osteoporotic medications to be recommended to very elderly subjects, in the perspective of reducing their risk of appendicular fractures. [less ▲]

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See detailEffect of residence time on the efficacy of antidandruff shampoos.
Pierard, Claudine ULg; Uhoda, Emmanuelle ULg; Loussouarn, G. et al

in International Journal of Cosmetic Science (2003), 25(6), 267-71

Dandruff is known to be controlled by fungistatic shampoos active against Malassezia spp. These products also remove the loosely attached scales. This study was performed to assess the effect of a 5-min ... [more ▼]

Dandruff is known to be controlled by fungistatic shampoos active against Malassezia spp. These products also remove the loosely attached scales. This study was performed to assess the effect of a 5-min residence time on the efficacy of antidandruff shampoos. Two commercially available shampoos were used in two groups of 21 panelists with severe dandruff. They contained either 1% ketoconazole or 1% piroctone olamine. In each group, intraindividual comparisons were made by a split-scalp design between the effect of a 5-min residence time versus no residence time. Both shampoos induced significant reductions in scaliness and yeast colonization. The beneficial effects were obvious immediately after one single shampooing and 3 days later as well. The improvement was greater with a 5-min residence time. The piroctone olamine treatment benefited more than the ketoconazole treatment from the extension of shampoo-exposure time. In conclusion, the benefit of a residence time in treating dandruff is documented. The level of improvement in efficacy may vary according to the nature of the shampoo. [less ▲]

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See detailGuidelines for the use of epoetin: have quality-of-life benefits been proven?
Bottomley, Andrew; Thomas, Ronald; Van Steen, Kristel ULg et al

in Journal of Clinical Oncology (2003), 21(11), 22232224-5

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See detailA local influence approach applied to binary data from a psychiatric study.
Jansen, Ivy; Molenberghs, Geert; Aerts, Marc et al

in Biometrics (2003), 59(2), 410-9

Recently, a lot of concern has been raised about assumptions needed in order to fit statistical models to incomplete multivariate and longitudinal data. In response, research efforts are being devoted to ... [more ▼]

Recently, a lot of concern has been raised about assumptions needed in order to fit statistical models to incomplete multivariate and longitudinal data. In response, research efforts are being devoted to the development of tools that assess the sensitivity of such models to often strong but always, at least in part, unverifiable assumptions. Many efforts have been devoted to longitudinal data, primarily in the selection model context, although some researchers have expressed interest in the pattern-mixture setting as well. A promising tool, proposed by Verbeke et al. (2001, Biometrics 57, 43-50), is based on local influence (Cook, 1986, Journal of the Royal Statistical Society, Series B 48, 133-169). These authors considered the Diggle and Kenward (1994, Applied Statistics 43, 49-93) model, which is based on a selection model, integrating a linear mixed model for continuous outcomes with logistic regression for dropout. In this article, we show that a similar idea can be developed for multivariate and longitudinal binary data, subject to nonmonotone missingness. We focus on the model proposed by Baker, Rosenberger, and DerSimonian (1992, Statistics in Medicine 11, 643-657). The original model is first extended to allow for (possibly continuous) covariates, whereafter a local influence strategy is developed to support the model-building process. The model is able to deal with nonmonotone missingness but has some limitations as well, stemming from the conditional nature of the model parameters. Some analytical insight is provided into the behavior of the local influence graphs. [less ▲]

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See detailIntercalative polymerization of cyclic esters in layered silicates : thermal vs. catalytic activation
Pantoustier, Nadège; Alexandre, Michaël ULg; Degée, Philippe et al

in Composite Interfaces (2003), 10(4-5), 423-433

Poly(ε-caprolactone) layered silicate nanocomposites were synthesized by in situ inter-calative ring-opening polymerization (ROP) of ε-caprolactone. The polymerization was promoted by thermal or catalytic ... [more ▼]

Poly(ε-caprolactone) layered silicate nanocomposites were synthesized by in situ inter-calative ring-opening polymerization (ROP) of ε-caprolactone. The polymerization was promoted by thermal or catalytic initiation starting from either non-modified natural sodium-montmorillonite (MMT-Na) or montmorillonite modified by different ammonium cations bearing either non-functional alkyl chains or chains terminated by carboxylic acid or hydroxyl functions. The resulting compositions were analyzed by small-angle X-ray diffraction and transmission electron microscopy. The clay dispersion depended on the structure of the alkyl ammonium. Exfoliated nanocomposites were formed when hydroxyl-containing alkyl-ammonium was used; otherwise, partially intercalated/partially exfoliated structures were observed. Moreover, caving to the inherent catalytic properties of the montmo-rillomte surface, it was also possible to prepare intercalated nanocomposites by in situ polymerization of ε-caprolactone in presence of non-modified montmorillonite-Na (MMT-Na) without any added catalyst. [less ▲]

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See detailSupplemental oxygen does not reduce postoperative nausea and vomiting after thyroidectomy
Joris, Jean ULg; Poth, N. J.; Djamadar, A. M. et al

in British Journal of Anaesthesia (2003), 91(6), 857-61

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See detailEmissions of ammonia, nitrous oxide, methane, carbon dioxide and water vapor in the raising of weaned pigs on straw-based and sawdust-based deep litters
Nicks, Baudouin ULg; Laitat, Martine ULg; Vandenheede, Marc ULg et al

in Animal Research (2003), 52(3, MAY-JUN), 299-308

Five successive batches of 40 weaned pigs were raised on deep litter of sawdust or straw without changing the litter in between batches. The quantity of litter dry matter utilized in the two cases was 5 ... [more ▼]

Five successive batches of 40 weaned pigs were raised on deep litter of sawdust or straw without changing the litter in between batches. The quantity of litter dry matter utilized in the two cases was 5 kg per pig. The concentrations of gases were measured 8 times, at about one-month intervals, for 6 consecutive days and the ventilation flow was recorded continuously. Pig raising on saw-dust-based litter differed from that with straw by an emission of 2.6 times less ammonia (0.46 vs. 1.21 g per pig per day), 2.1 times less methane (0.77 vs. 1.58 g per pig per day), 3.9 times more N2O (1.39 vs. 0.36 g per pig per day), 4% more CO2 (481 vs. 463 g per pig per day) and 21% more H2O (1126 vs. 933 g per pig per day). All differences were significant. About 58% of the nitrogen excreted by the pigs was recovered in the gas form and for the two litters, about 79% in the form of N-2. [less ▲]

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See detailThe Zápara Indians : the Consecration of an Endangered People
Bilhaut, Anne-Gaël ULg

in Museum International (2003), 55(2), 25-30

Focuses on the United Nations Educational, Scientific and Cultural Organization's (UNESCO) declaration of the oral heritage and cultural manifestations of the Zápara people of Amazonia as a 'Masterpiece ... [more ▼]

Focuses on the United Nations Educational, Scientific and Cultural Organization's (UNESCO) declaration of the oral heritage and cultural manifestations of the Zápara people of Amazonia as a 'Masterpiece of the Oral and Intangible Heritage of Humanity.' Impact that the UNESCO recognition has had on the Zápara; Details of how the Zápara were able to secure sacred status from the UNESCO. [less ▲]

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See detailPolitiques foncières et mécanismes fonciers en Wallonie : objectifs politiques, outils juridiques et mise en œuvre
Dubois, O.; Halleux, Jean-Marie ULg

in Ruimte & Planning (2003), (4), 265-283

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See detailModulating skeletal muscle mass by postnatal, muscle-specific inactivation of the myostatin gene.
Grobet, Luc ULg; Pirottin, Dimitri ULg; Farnir, Frédéric ULg et al

in Genesis (2003), 35(4), 227-38

By using a conditional gene targeting approach exploiting the cre-lox system, we show that postnatal inactivation of the myostatin gene in striated muscle is sufficient to cause a generalized muscular ... [more ▼]

By using a conditional gene targeting approach exploiting the cre-lox system, we show that postnatal inactivation of the myostatin gene in striated muscle is sufficient to cause a generalized muscular hypertrophy of the same magnitude as that observed for constitutive myostatin knockout mice. This formally demonstrates that striated muscle is the production site of functional myostatin and that this member of the TGFbeta family of growth and differentiation factors regulates muscle mass not only during early embryogenesis but throughout development. It indicates that myostatin antagonist could be used to treat muscle wasting and to promote muscle growth in man and animals. [less ▲]

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See detailCarbon dioxide daily variations and atmospheric fluxes over the Great Bahama Bank using a novel autonomous measuring system
Frankignoulle, Michel; Biondo, Renzo ULg; Théate, Jean-Marie et al

in Caribbean Journal of Sience (2003), 39(3), 257-264

A novel autonomous measuring device that acquires the partial pressure of CO2 (pCO2) by equilibration and several other parameters is described. This device, the Floating Equilibrator System (FES) was ... [more ▼]

A novel autonomous measuring device that acquires the partial pressure of CO2 (pCO2) by equilibration and several other parameters is described. This device, the Floating Equilibrator System (FES) was tested in field conditions for the first time in the Great Bahama Bank, in December 2000. We successfully carried out two 24 h cycles in Norman’s Pond, one in front of the Caribbean Marine Research Centre (CMRC) and another one near Bock Cay. Over-saturation of CO2 with respect to atmospheric equilibrium was observed systematically at the three sites, although significantly more marked at Norman’s Pond. The higher values of pCO2 and atmospheric CO2 fluxes obtained at Norman’s Pond, than in the adjacent open waters of the Great Bahama Bank, suggest a comparatively stronger heterotrophy at Norman’s Pond. This is most likely related to the organic carbon inputs to the water column and sediments from the dense mangrove forest surrounding Norman’s Pond. The larger amplitude of pCO2 daily variations observed, during the Norman’s Pond 24 h cycles, is probably due to higher biological activity than in the adjacent open waters of the Great Bahama Bank. This is corroborated by a tentative estimation of Gross Primary Production based on simple computations. We speculate that calcification could also contribute to some extent to different amplitude of the pCO2 daily variations between the mangrove pond and the open waters of the Great Bahama Bank. [less ▲]

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See detailDistribution of surface carbon dioxide and air-sea exchange in the English Channel and adjacent areas
Borges, Alberto ULg; Frankignoulle, Michel

in Journal of Geophysical Research (2003), 108(C5),

In the present paper we report the distribution of the partial pressure of CO2 (pCO2) in surface waters along 13 transects in the English Channel, covering the four seasons. The spatial and temporal ... [more ▼]

In the present paper we report the distribution of the partial pressure of CO2 (pCO2) in surface waters along 13 transects in the English Channel, covering the four seasons. The spatial and temporal variability of pCO2 is controlled by a complex combination of primary production (from May to June), degradation of organic matter, temperature change, and freshwater inputs. Preliminary air-sea CO2 exchange computations suggest that the Channel is not a major sink of atmospheric CO2 and is probably neutral from the point of view of atmospheric coupling. This is mainly related to a relatively low export and/or burial of organic carbon and intense benthic calcification. [less ▲]

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See detailThe cutting edge of superabrasives quality control
Pirard, Eric ULg

in Industrial Diamond Review (2003), 03(3), 49-50

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See detailL’enseignement universitaire demain. Le cas de la Belgique francophone
Merenne-Schoumaker, Bernadette ULg

in Géographes Associés (2003), (27), 63-65

Courte présentation de la situation de la géographie dans le monde universitaire francophone de Belgique au moment de la Réforme de Bologne

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See detailDu Séminaire de Géographie au Département de Géographie, Cent ans de géographie à l’Université de Liège, 1903-2003
Merenne-Schoumaker, Bernadette ULg

in Bulletin de la Société Géographique de Liège (2003), (43), 3-17

100-year history of teaching and research in geography at the University of Liege

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See detailLa Société géographique de Liège
Merenne-Schoumaker, Bernadette ULg

in Bulletin de la Société Géographique de Liège (2003), (43), 185-194

75-year history of the Geographical Society of Liege

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See detailThe use of data assimilation in coupled hydrodynamic, ecological and biogeochemical models of the ocean
Grégoire, Marilaure ULg; Brasseur, Pierre; Lermusiaux, Pierre

in Journal of Marine Systems (2003), 40-41(1-3), 405

The International Lie`ge Colloquium on Ocean Dynamics is organized annually. The topic differs from year to year in an attempt to address, as much as possible, recent problems and incentive new subjects ... [more ▼]

The International Lie`ge Colloquium on Ocean Dynamics is organized annually. The topic differs from year to year in an attempt to address, as much as possible, recent problems and incentive new subjects in oceanography. Assembling a group of active and eminent scientists from various countries and often different disciplines, the Colloquia provide a forum for discussion and foster a mutually beneficial exchange of information opening on to a survey of recent discoveries, essential mechanisms, impelling question marks and valuable recommendations for future research. The objective of the 2001 Colloquium was to evaluate the progress of data assimilation methods in marine science and, in particular, in coupled hydrodynamic, ecological and bio-geo-chemical models of the ocean. [less ▲]

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See detailInfluence of a nonlinear reference temperature profile on oscillatory Benard-Marangoni convection.
Dondlinger, M.; Colinet, P.; Dauby, Pierre ULg

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2003), 68(6 Pt 2), 066310

We analyze oscillatory instabilities in a fluid layer of infinite horizontal extent, heated from above or cooled from below, taking into account the nonlinearity of the reference temperature profile ... [more ▼]

We analyze oscillatory instabilities in a fluid layer of infinite horizontal extent, heated from above or cooled from below, taking into account the nonlinearity of the reference temperature profile during the transient state of heat conduction. The linear stability analysis shows that a nonlinear reference temperature profile can have a strong effect on the system, either stabilizing or destabilizing, depending on the relative importance of buoyancy and surface tension forces. For the nonlinear analysis we use a Galerkin-Eckhaus method leading to a finite set of amplitude equations. In the two-dimensional (2D) case, we show the solution of these amplitude equations are standing waves. [less ▲]

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See detailEditorial. Vers le troisième départ du mélèze en Région wallonne
Hebert, Jacques ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2003), 7(1), 3-4

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See detailRecognizing and interpreting the fossils of early eukaryotes
Javaux, Emmanuelle ULg; Knoll, A. H.; Walter, M.

in Origins of Life & Evolution of the Biosphere (2003), 33(1), 75-94

Using molecular sequence data, biologists can generate hypotheses of protistan phylogeny and divergence times. Fossils, however, provide our only direct constraints on the timing and environmental context ... [more ▼]

Using molecular sequence data, biologists can generate hypotheses of protistan phylogeny and divergence times. Fossils, however, provide our only direct constraints on the timing and environmental context of early eukaryotic diversification. For this reason, recognition of eukaryotic fossils in Proterozoic rocks is key to the integration of geological and comparative biological perspectives on protistan evolution. Microfossils preserved in shales of the ca. 1500 Ma Roper Group, northern Australia, display characters that ally them to the Eucarya, but, at present, attribution to any particular protistan clade is uncertain. Continuing research on wall ultrastructure and microchemistry promises new insights into the nature and systematic relationships of early eukaryotic fossils. [less ▲]

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See detailLa cartographie et la géomatique
Donnay, Jean-Paul ULg

in Bulletin de la Société Géographique de Liège (2003), 43

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