References of "1990"
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See detailCore velocity dispersion and mass-to-light ratio of the old Magellanic globular cluster NGC 1835
Dubath, P.; Meylan, G.; Mayor, M. et al

in Astronomy and Astrophysics (1990), 239

Abstract image available at: http://adsabs.harvard.edu/abs/1990A&A...239..142D

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See detailThe chemical composition of the extreme halo stars. II - Green spectra of 20 dwarfs
Zhao, G.; Magain, Pierre ULg

in Astronomy and Astrophysics (1990), 238

The abundances of nine elements in the atmospheres of 20 extreme metal-poor stars are derived from green spectra obtained with the ESO Cassegrain Echelle Spectrograph (CASPEC). Sodium is found to be ... [more ▼]

The abundances of nine elements in the atmospheres of 20 extreme metal-poor stars are derived from green spectra obtained with the ESO Cassegrain Echelle Spectrograph (CASPEC). Sodium is found to be overabundant with respect to aluminum by as much as one dex. There is some scatter in Ca/Fe which cannot be accounted for by random errors in equivalent widths or atmospheric parameters. Scandium is overabundant relative to iron. Some barium lines may be affected by strong departures from local thermodynamic equilibrium. The nitrogen-rich metal-poor star HD 74000, which was found in previous work to be also Al-rich, also presents higher than usual abundances of Na and of s-process elements. It can thus be considered as a mild barium dwarf of Population II. [less ▲]

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See detailβ-Lactamase expression in Streptomyces cacaoi
Urabe, Hiroaki; Lenzini, Mauro V; Mukaide, Masakazu et al

in Journal of Bacteriology (1990), 172(11), 6427-6434

Plasmids were prepared by inserting genomic DNA fragments from Streptomyces cacaoi within the mel gene of plasmid pIJ702. The inserted DNA fragments contain the beta-lactamase-encoding bla gene and ... [more ▼]

Plasmids were prepared by inserting genomic DNA fragments from Streptomyces cacaoi within the mel gene of plasmid pIJ702. The inserted DNA fragments contain the beta-lactamase-encoding bla gene and upstream nucleotide sequences of various lengths. The transcription start point of bla was identified by nuclease S1 mapping. Upstream nucleotide sequences of sufficient lengths had an enhancing effect on beta-lactamase production by the Streptomyces host. The dot blot hybridization assay revealed that this effect was exerted at the transcriptional level. Experimental evidence strongly suggests that the underlying mechanism involves, at least in part, one or several trans-acting elements. In one of the constructs, in which the upstream nucleotide sequence was reduced to 0.3 kb, the bla promoter was present but the bla gene was expressed by readthrough from a promoter, possibly the mel promoter, of the pIJ702 vector. [less ▲]

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See detailDétermination du degré de réticulation du collagène par sa solubilité thermique et par analyse calorimétrique différentielle (ACD).
Bastiaens, Annette; Sindic, Marianne ULg; Deroanne, Claude et al

in Viandes et Produits Carnés (1990), 11

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See detailDe la valeur d'une entreprise à la détermination de son prix de cession : le problème du "Goodwill"
Van Caillie, Didier ULg; Leboutte, Denys

in La Vie au Bureau (1990), 1990(Novembre), 12-20

This paper discusses key aspects linked to the valuation of "Goodwill" in the Belgian accounting context and discusses some important questions specific to the valuation of SMEs.

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See detailEvolution du profil en azote des sols agricoles du sud de la Belgique.
Tychon, Bernard ULg; Guiot, S.; Debbaut, Vincent ULg et al

Conference (1990, November)

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See detailSubsonic and Transonic Cascade Design
Léonard, Olivier ULg

in Van den Braembussche, René (Ed.) Inverse Methods for Airfoil Design for Aeronautical and Turbomachinery Applications (1990)

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See detailInfluence of breed of fetus on periparturient endocrine responses and subsequent milk production of Ayrshire dams
Guilbault, L. A.; Roy, G. L.; Beckers, Jean-François ULg et al

in Journal of Dairy Science (1990), 73(10), 2766-2773

Purebred Ayrshire females were assigned to two groups based on the breed of fetus carried during gestation. In group 1, Limousin embryos were transferred nonsurgically into Ayrshire recipients (10 heifers ... [more ▼]

Purebred Ayrshire females were assigned to two groups based on the breed of fetus carried during gestation. In group 1, Limousin embryos were transferred nonsurgically into Ayrshire recipients (10 heifers and 1 cow), and in group 2, 11 Ayrshire heifers and 1 cow were inseminated artificially to Ayrshire bulls. Blood samples were collected daily from d 265 of gestation until d 15 postpartum from 5 heifers of each group. Milk yield was recorded on alternate weeks during the first 20 wk postpartum. Calf birth weight was higher (44.2 vs. 35.4 kg) and gestation was longer (297.4 vs. 280.2 d) in Ayrshire dams bearing Limousin fetuses than in those bearing Ayrshire fetuses. Daily milk production for the first 20 wk was lower (18.1 vs. 20.8 kg) in Ayrshire dams bearing Limousin fetuses than in those bearing Ayrshire fetuses. Prepartum decrease in progesterone concentrations and increase in estrone concentrations were faster in Ayrshire heifers bearing Limousin fetuses than in those bearing Ayrshire fetuses. Profiles of peripartum concentrations of bovine placental lactogen differed between Ayrshire dams carrying different families of Limousin fetuses but were similar in those carrying families of Ayrshire fetuses. The concentrations of 15-keto-13,14-dihydroprostaglandin F2 were lower during the postpartum period in heifers that gave birth to Limousin calves than in those that had Ayrshire calves. In conclusion, the breed of fetus influences physiological and endocrine responses of the dam, which might have some effect on milk production of the dam. [less ▲]

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See detailAndrogen and Estrogen Action in the Preoptic Area and Activation of Copulatory Behavior in Quail
Balthazart, Jacques ULg; Surlemont, C.

in Physiology & Behavior (1990), 48(5), 599-609

The sites of androgen and estrogen action on sexual behavior were studied in the preoptic area of castrated male Japanese quail by stereotaxic implantation of hormones, antihormones and metabolism ... [more ▼]

The sites of androgen and estrogen action on sexual behavior were studied in the preoptic area of castrated male Japanese quail by stereotaxic implantation of hormones, antihormones and metabolism inhibitors. The first experiment demonstrated that bilateral implantation of the aromatase inhibitor, androstatrienedione (ATD), in the sexually dimorphic nucleus (POM) of the preoptic area can completely suppress the behavioral activation produced by a systemic treatment with testosterone. The effects of ATD were only observed if the implants were located in the POM. In the second experiment, implants in the POM of the synthetic estrogen, diethylstilbestrol, restored copulatory behavior in castrated males while implants of the synthetic nonaromatizable androgen, methyltrienolone, were almost ineffective. During the third experiment, the activating effects of a systemic treatment with testosterone were blocked by stereotaxic implants in the POM of the antiestrogen, tamoxifen, or the antiandrogen, flutamide. The effects of tamoxifen were more pronounced than those of flutamide. In addition, tamoxifen was active in all parts of the POM while a behavioral inhibition was observed only for flutamide implants which were located in the caudal part of the nucleus. Taken together, these results demonstrate that the sexually dimorphic POM is the area where the behaviorally active estrogenic metabolites of T have to be produced. The estradiol derived from T aromatization presumably acts within the POM to activate copulation as demonstrated by the effectiveness of DES implanted in this region. Androgens also have a direct action on sexual behavior as suggested by the partial inhibition observed in flutamide-treated birds. It is, however, suggested that androgens and estrogens do not act in the same brain area to activate behavior. [less ▲]

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See detailA Machine-Intelligent System for Automatic Target Recognition
Dudgeon, Dan E.; Verly, Jacques ULg; Delanoy, Richard L.

Conference (1990, November)

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See detailLe tamoxifene comme premier traitement du cancer du sein chez la femme âgée: un recul de 10 ans
Colin, Claude ULg; Lifrange, Eric ULg; Genicot, F. et al

in Revue Médicale de Liège (1990), 45(11), 533-8

Cinquante-six patientes, âgées de plus de 70 ans, ont été traitées par tamoxifène pour cancer mammaire T1 à T4. Un délai de 3 à 6 mois est nécessaire pour obtenir une régression de l'opacité tumorale dans ... [more ▼]

Cinquante-six patientes, âgées de plus de 70 ans, ont été traitées par tamoxifène pour cancer mammaire T1 à T4. Un délai de 3 à 6 mois est nécessaire pour obtenir une régression de l'opacité tumorale dans 46,4% des cas, une stabilisation dans 30,4% et une augmentation dans 23,2%. Le type de réponse semble indépendant du stade initial de la tumeur. La survie globale à 10 ans n'est pas différente de cette des patientes de même âge qui avaient préféré recourir au traitement loco-régional classique. Par contre, en cas de régression tumorale, la durée de la survie est nettement plus longue et est comparable à celle d'une population témoin de même âge. Les récidives locales sont fréquentes. Elle sont de moins bon pronostic si elles surviennent au cours des trois premières années du traitement. La véritable cause du décès est souvent difficile à préciser chez ces patientes. Une relation directe avec le cancer mammaire n'est observée que dans la moitié des cas. [less ▲]

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See detailEffets de facteurs neuronotrophiques sur la régénération des neurones auditifs adultes in vitro
Lefebvre, Philippe ULg; Weber, T.; Delrée, P. et al

Conference (1990, November)

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See detailFormation et emploi: une rencontre imprévisible. La gestion de la formation comme outil d'insertion professionnelle
Robert, Jocelyne ULg

in Les régions et l'Europe-Commission 3 Fédéralisme, structures productives et ressources humaines (1990, November)

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See detailElites, leadership et pouvoir dans les communautés ethniques d'origine immigrée
Martiniello, Marco ULg

Scientific conference (1990, October 31)

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See detailIy and iw as a single morphological and semantic entity
Winand, Jean ULg

Conference (1990, October 18)

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