Métabolisme de la 6-fluoro-L-tyrosine chez le rat

Poster (1997, May 29)

Le p-[18F]MPPF: un nouveau ligand pour l'étude par TEP des récepteurs 5-HT1A

Poster (1997, May 25)

À propos de quelques termes de scénologie médiévale

Conference (1997, May 24)

L'expertise pénale du fond (enfin) contradictoire

in Revue de Jurisprudence de Liège, Mons et Bruxelles (1997), 20(1997), 792-796

La Cour constitutionnelle belge est à l'origine d'une évolution majeure en procédure pénale en ce qui concerne le caractère contradictoire des expertises ordonnées en matière pénale.

L'automatisation dans l'agriculture et dans l'industrie agro-alimentaire. Un exemple : le tri des fruits en fonction de leurs caractéristiques externes

Scientific conference (1997, May 15)

Séminaire de vulgarisation sur l'utilisation des techniques d'analyse d'image pour l'évaluation de la forme de fruit et pour la recherche de défauts.

Intérêt et positionnement d'un traitement fongicide avant le stade épiaison sur froment d'hiver dans les conditions culturales de la Belgique

in Mededelingen van de Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen (Rijksuniversiteit te Gent) (1997, May 06), 62(3b), 1109-1115

Sur des cultures recevant une protection fongicide à large spectre à l'épiaison (GS 59), les effets d'un traitement fongicide effectué soit au stade 31-32 soit au stade 39 ont été examinés au cours des ... [more ▼]

Sur des cultures recevant une protection fongicide à large spectre à l'épiaison (GS 59), les effets d'un traitement fongicide effectué soit au stade 31-32 soit au stade 39 ont été examinés au cours des cinq dernières années. Ces traitements précoces ne se sont avérés rentables que lorsque la pression des maladies était importante. Dans ce cas, les résultats montrent que, généralement, il est préférable d'attendre le stade dernière feuille GS39 pour intervenir. Le risque de perte de rendement par rapport à une intervention au stade GS31-32 est minime; de plus, la décision de traiter et le choix des fongicides sont beaucoup plus aisés. [less ▲]

Macromolecular engineering of polylactones and polylactides. 22. Copolymerization of ε-caprolactone and 1,4,8-trioxaspiro[4.6]-9-undecanone initiated by aluminum isopropoxide

in Macromolecules (1997), 30(9), 2575-2581

Novel biodegradable and biocompatible polyesters have been prepared by random copolymerization of ε-caprolactone (ε-CL) and 1,4,8-trioxaspiro[4.6]-9-undecanone (TOSUO) initiated by Al(OiPr)3. Copolyesters ... [more ▼]

Novel biodegradable and biocompatible polyesters have been prepared by random copolymerization of ε-caprolactone (ε-CL) and 1,4,8-trioxaspiro[4.6]-9-undecanone (TOSUO) initiated by Al(OiPr)3. Copolyesters of molecular weight (Mn) up to 104 and containing up to 90 mol % TOSUO repeating units have been prepared. The copolymer molecular weight is controlled by the molar ratio of the consumed comonomers and the initiator. The TOSUO constitutive units have been quantitatively deacetalized into ketones, which have also been efficiently reduced into hydroxyl groups without any apparent chain degradation. Therefore, poly(ε-caprolactone) (PCL) with well-defined content of ketone or hydroxyl pendent groups have been made available. The ε-CL and TOSUO comonomer units are randomly distributed within the copolymers, as assessed by the 13C-NMR sequence analysis. Indeed, the reactivity ratios (rC and rT) have been calculated from the average length of the ε-CL sequences (LC) and the TOSUO sequences (LT) and found to be 1.3 (rC) and 1.0 (rT), respectively. There is an interesting parallelism between the crystallinity and the average length of the ε-CL sequences. Copolyesters containing a molar fraction of TOSUO units smaller than 0.15 are semicrystalline, whereas the incorporation of larger amounts of TOSUO units results in amorphous copolyesters. Conversion of the ethylene acetal pendent groups into ketones and ultimately into hydroxyl pendent groups results in increasing glass transition temperature (Tg), melting temperature (Tm), and melting enthalpy (ΔHm). The thermal stability depends on the copolyester composition, since it decreases as the molar fraction of TOSUO units is increased. [less ▲]

Case study concerning the opportunity of installing cogeneration system in an existing industrial site

in Proceedings ECCE-1, Volume 3 (1997, May 04)

The combined production of heat and power using cogeneration systems is one of the investigated area to reduce the global CO2 production of the industrial activities in Europe. Due to the time scale of ... [more ▼]

The combined production of heat and power using cogeneration systems is one of the investigated area to reduce the global CO2 production of the industrial activities in Europe. Due to the time scale of the investment, the appropriate sizing of a cogeneration unit is critical for defining the financial feasibility of the project. The possible efforts that could be made during this time scale for improving the enorgy efficiency of the process can make the cogeneration system oversized or even useless. In this paper, we present two methods that we applied to compute the appropriate size of a cogeneration system to be integrated to an industrial site. The first is directly based ôn the present steam consumption figures. This approach is easier and simpler but the solution is not sure for the future, it leads to a 5.6 MW gas turbine but without reducing the overall energy requirements of the plant. The second is based on energy integration including the optimal use of the steam network for CHP. This approach has the advantage to provide a reliable solution for the future. Using this approach, we have computed an energy savings potential of 60Vo, the energy requirements being satisfied by a 4.6 MW gas turbine, and the possibility of producing a complementary 3 MW with steam turbines. [less ▲]

Stability of Ondansetron Hydrochloride and Dexamethasone Sodium Phosphate in 0.9% Sodium Chloride Injection and in 5% Dextrose Injection

in American Journal of Health-system Pharmacy (1997), 54(9), 1065-8

Design, synthèse et évaluation pharmacologique de nouvelles 2-alkylamino-quinazoline-4-ones en tant du’isostères de 3-alkylamino-4H-pyrido[4,3-e]-1,2,4-thiadiazine 1,1-dioxydes

Poster (1997, May)