References of "1993"
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See detailYeast excision repair RAD2 encodes a single-stranded DNA endonuclease
Habraken, Yvette ULg; Sung, Partick; Prakash, Louise et al

in Nature (1993), 366

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See detailVers une pédagogie différenciée des langues germaniques axée sur la théorie des styles d'apprentissage.
Simons, Germain ULg

Conference given outside the academic context (1993)

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See detailHypothyroïdie frustre : à partir de quand traiter?
Beckers, Albert ULg

Scientific conference (1993, December 11)

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See detailMagnetic Eden model
Ausloos, Marcel ULg; Vandewalle, Nicolas ULg; Cloots, Rudi ULg

in Europhysics Letters [=EPL] (1993), 24(8), 629-634

We introduce the <<Magnetic Eden Model(s)>>. It consists in the usual Eden growth model(s), but allowing for the elements of the growth to have an extra degree of freedom (a <<spin>>). The growth is ... [more ▼]

We introduce the <<Magnetic Eden Model(s)>>. It consists in the usual Eden growth model(s), but allowing for the elements of the growth to have an extra degree of freedom (a <<spin>>). The growth is controlled by a condition depending on the <<magnetic state>> of the perimeter (through some <<spin coupling>>) and an external parameter, the <<magnetic field>>. Even though these words seem to refer to some <<energetic condition>> the growth model is of purely kinetic origin. This is demonstrated by exactly solving the 1-dimensional growth model for a semi-open chain, and, e.g. finding the correlation functions. In two-dimensions, simulations of clusters lead us to show that the perimeter growth exponent is coupling dependent. We show the morphologies of growth clusters on a <<phase diagram>> and indicate the <<physical origin>> and transition(s) between compact and lacunar clusters. [less ▲]

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See detailFully Automated Determination of Sulfamethazine in Ovine Plasma Using Solid-Phase Extraction on Disposable Cartridges and Liquid Chromatography
Hubert, Philippe ULg; Chiap, Patrice ULg; Evrard, Brigitte ULg et al

in Journal of Chromatography. A (1993), 622(1), 53-60

An automatic sample preparation procedure followed by on-line injection of the sample extract into a HPLC system has been developed for the quantitative analysis of sulfamethazine and its N4-acetyl ... [more ▼]

An automatic sample preparation procedure followed by on-line injection of the sample extract into a HPLC system has been developed for the quantitative analysis of sulfamethazine and its N4-acetyl metabolite in ovine plasma. The sample clean-up was performed by solid-phase extraction (SPE) on C18 disposable extraction cartridges (DECs). All the sample handling operations were effected by a robotic auto-sampler. The DEC was first conditioned with methanol and phosphate buffer pH 7.4. After loading 1.0 ml of plasma sample onto the DEC, the latter was washed with the same buffer. The elution step was performed with methanol (0.25 ml) and the eluate was then diluted by adding 0.75 ml volume of phosphate buffer pH 6.4. A 20-microliters volume of the resultant solution was injected onto an octadecyl silica column preceded by a short guard column. The HPLC mobile phase was methanol-phosphate buffer pH 6.4 (25:75, v/v). Sulfamethazine and N4-acetylsulfamethazine were determined photometrically at 262 nm. Under these conditions, linear calibration curves ranging from 2 to 250 micrograms ml-1 have been obtained for both compounds. Drug recoveries were higher than 90% and typical relative standard deviation values were 0.7% (within-day) and 2.0% (between-day) at a plasma concentration of 50 micrograms ml-1. [less ▲]

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See detailAnionic polymerization of acrylic monomers. 11 NMR investigation of the mixed complexation of methyl α-lithioisobutyrate and lithium chloride
Wang, Jin-Shan; Warin, R.; Jérôme, Robert ULg et al

in Macromolecules (1993), 26

Solutions of methyl α-lithioisobutyrate (MIBLi) in THF added with various amounts of lithium chloride (LiCl) have been analyzed by Li-7 NMR spectroscopy in a wide range of temperatures. Although below ca ... [more ▼]

Solutions of methyl α-lithioisobutyrate (MIBLi) in THF added with various amounts of lithium chloride (LiCl) have been analyzed by Li-7 NMR spectroscopy in a wide range of temperatures. Although below ca. 205 K tetramers of MIBLi have been reported to be in equilibrium with dimers, 1/1 and 2/1 LiCl/MIBLi mixed complexes instantaneously form upon the addition of 1 and 2 mol equiv of LiCl, respectively. Further addition of LiCl more likely promotes the formation of a less stable 3/1 complex. Both 1/1 and 2/1 adducts are stable between -80-degrees-C and at least +12-degrees-C. From C-13 NMR spectroscopy, it appears that the addition of an equimolar amount of LiCl to the MIBLi solution in THF is at the origin of a ca. 7.0 ppm upfield shift of the metalated α-carbon compared to the tetrameric MIBLi species and a ca. 1.0 ppm downfield shift with respect to the dimeric MIBLi. However, the charge distribution over the carbanion does not change anymore when the amount of LiCl exceeds 1 mol equiv. In contrast to nonligated MEBLi, the OR group has a considerable rotational freedom in LiCl-modified MIBLi. A comparison of the structure and dynamics of the LiCl-modified MIBLi species in THF at 197 K with the characteristic features of the anionic polymerization of MMA under the same conditions suggests that the formation of one type of LiCl-complexed species has a decisive effect on the control of the living polymerization of MMA. This conclusion is in agreement with a kinetic study carried out by Muller for the same system. [less ▲]

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See detailSelective gravitational microlensing and line profile variations in the BAL quasar H 1413+117
Hutsemekers, Damien ULg

in Astronomy and Astrophysics (1993), 280

In order to interpret the spectral differences observed between the four images of the gravitationally lensed broad absorption line (BAL) quasar H 1413+117, we have investigated the effect on the line ... [more ▼]

In order to interpret the spectral differences observed between the four images of the gravitationally lensed broad absorption line (BAL) quasar H 1413+117, we have investigated the effect on the line profiles of the selective magnification of individual BAL clouds by gravitational microlenses. Since microlenses magnify both the selected cloud and the whole BAL region, this effect is only differential, and general constraints on its capability to produce spectral variations have been derived. Considering simple but realistic models for the microlenses, we find that the selective magnification of a relatively large optically thick BAL cloud can be at the origin of the spectral differences reported between the components of H 1413+117. However, a very precise configuration is needed: the magnified cloud must be at the border of the BAL region which must itself partially lie in a region of strong de-magnification. The fine tuning of the parameters mecessary to reproduce the observations either seriously questions this kind of interpretation or puts strong constraints on the lensing models. Another interpretation of the observed line profile differences in terms of effects due to microlensing is also briefly discussed. [less ▲]

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See detailMorphological segmentation-based coding of image sequences
Salembier, P.; Casas, J.R.; Gasull, A. et al

Scientific conference (1993, December)

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See detailEtre ou non branché aux médias
Leclercq, Dieudonné ULg

in Emergence. Revue proposée par l'ICC en collaboration avec MEDIA ANIMATION et le CFA (1993), 21

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See detailClonage par greffe de blastomère: naissance d'un premier veau
Ectors, Fabien ULg; Delval, Alain; Touati, Kamal ULg et al

in Annales de Médecine Vétérinaire (1993), 137(8), 573-574

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See detailField Efficacy of Injectable Moxidectin in Cattle Naturally Infested with Chorioptes Bovis and Sarcoptes Scabiei
Losson, Bertrand ULg; Lonneux, J. F.

in Veterinary Parasitology (1993), 51(1-2), 113-21

Field efficacy of moxidectin, a macrocyclic lactone endectocide, was evaluated in cattle naturally infested with Chorioptes bovis and Sarcoptes scabiei. Eight animals were allocated to two groups of four ... [more ▼]

Field efficacy of moxidectin, a macrocyclic lactone endectocide, was evaluated in cattle naturally infested with Chorioptes bovis and Sarcoptes scabiei. Eight animals were allocated to two groups of four animals each, based on parasitological and clinical status. Animals of the treated group received one subcutaneous injection of injectable moxidectin at 0.2 mg kg-1 body weight on Day 0. Individuals of the control group received emergency treatment of a single injection of moxidectin at 0.2 mg kg-1 body weight on Day 28. Efficacy was assessed by (a) taking skin samples from each animal on Days 0, 7, 14, 21, 28, 42 and 56 and observing the numbers of viable mite stages and species and (b) clinical examination of animals on Days 7, 14, 21, 28, 42 and 56 with the percentage of affected body surface calculated for each animal on Days 0, 28 and 56. On the basis of the geometric means from treated and control animals, the percentage reductions in the total numbers of living C. bovis mites on Days 7, 14, 21 and 28 were 69, 87, more than 99 and 98, respectively. However, at the end of the trial, only two animals were negative for C. bovis. The percentage reductions in the total numbers of S. scabiei on Days 7, 14, 21 and 28 were 93, 100, 100 and 100, respectively. Clinical indices of the treated animals showed a sharp decrease in the affected body surface area from a mean of 43.6% on Day 0 to 0.9% and 0% on Days 28 and 56, respectively.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

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See detailOppervlakte-biopsie
Nikkels, Arjen ULg; Pierard-Franchimont, Claudine ULg; Pierard, Gérald ULg

in Nederlands Tijdschrift voor Dermatologie en Venereologie (1993), 3

Superficial skin surface stripping (SSSS) enables the study of the outermost cell layers of the stratum corneum. In this article we review the diagnostic value and the research possibilities offered by ... [more ▼]

Superficial skin surface stripping (SSSS) enables the study of the outermost cell layers of the stratum corneum. In this article we review the diagnostic value and the research possibilities offered by SSSS. This technique is non invasive and provides information useful in the differential diagnosis of erythematosquamous and eczematous lesions and pigmented neoplasms. For research purposes SSSS can also be used as substratum for scanning electron microscopic assessments and biochemical analysis. [less ▲]

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See detailLe come back de Nyles Jones a.k.a. GUITAR GABRIEL
Sacré, Robert ULg

in Soul Bag (1993), (129),

Vie et oeuvre de Robert Lewis 'Nyles' JONES ou Guitar Gabriel

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See detailMicroencapsulation of HIV antigen: Potential application of the spray-drying technique.
Grek, V.; Zgoulli, S.; Goffinet, Gerhard ULg et al

Poster (1993, December)

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See detailLa forêt, patrimoine de l'avenir
Rondeux, Jacques ULg

Book published by Les Presses Agronomiques de Gembloux (1993)

Notre civilisation est aux prises avec le problème de sa propre survie et elle a de plus en plus une conscience aiguë des risques élevés qu'elle court. A ce titre, le devenir de la forêt représente un ... [more ▼]

Notre civilisation est aux prises avec le problème de sa propre survie et elle a de plus en plus une conscience aiguë des risques élevés qu'elle court. A ce titre, le devenir de la forêt représente un enjeu capital et, si l'on n'y prend garde, l'appauvrissement de ce patrimoine occupant le tiers des terres émergées ne saurait que compromettre l'avenir de l'homme. L'homme entretient avec la forêt des rapports vraiment très curieux. Dans sa mémoire et dans son imaginaire, elle revêt des aspects bénéfiques : berceau de la vie, abri, source d'aliments de toutes sortes et de bois pour le feu, les outils et la construction, sans oublier la beauté des paysages qu'elle compose ou dans lesquels elle s'inscrit. En même temps, elle symbolise aussi des aspects maléfiques : lieu des terreurs et des angoisses, obscurité touffue, repaire des bêtes féroces, mystère et pièges pour l'inconnu qui ose s'y aventurer. La même ambivalence apparaît dans le comportement de l'homme envers la forêt : il la considère comme un précieux héritage reçu du passé et qu'il faut transmettre aux générations futures ; il sait qu'il faut l'utiliser avec mesure et de façon durable ; il sent qu'elle est essentielle à l'hygiène et à l'équilibre de la planète et en même temps, cruel dilemme, pour survivre, il doit lui faire la guerre, grignoter sur elle l'espace nécessaire aux cultures, à l'élevage, à ses implantations villageoises, urbaines ou industrielles. A mesure qu'il prolifère, il défriche toujours plus et arrache à la forêt des quantités toujours plus importantes de bois d'oeuvre et de feu. C'est à l'échelle mondiale qu'il faut envisager les moyens de préserver et de développer les fonctions essentielles de la forêt, sur le triple front de l'écologie, de l'économie et du social. [less ▲]

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