La médecine sportive: une partie intégrante de la médecine vétérinaire

in Annales de Médecine Vétérinaire (1990), 134

Appien, ses traducteurs français et Marx

in Acta classica Universitatis Scientiarum Debreceniensis (1990), 26

Study of the Influence of Appian in France through his translators and on Marxism

A QCD-inspired model for exclusive Vector meson production in deep inelastic scattering

in Nuclear Physics B (1990), 336

Spatiotemporal segregation of endothelial cell integrin and nonintegrin extracellular matrix-binding proteins during adhesion events.

in Journal of Cell Biology (1990), 110(3), 789-801

Bovine aortic endothelial cell (BAEC) attachments to laminin, fibronectin, and fibrinogen are inhibited by soluble arginine-glycine-aspartate (RGD)-containing peptides, and YGRGDSP activity is responsive ... [more ▼]

Bovine aortic endothelial cell (BAEC) attachments to laminin, fibronectin, and fibrinogen are inhibited by soluble arginine-glycine-aspartate (RGD)-containing peptides, and YGRGDSP activity is responsive to titration of either soluble peptide or matrix protein. To assess the presence of RGD-dependent receptors, immunoprecipitation and immunoblotting studies were conducted and demonstrated integrin beta 1, beta 3, and associated alpha subunits as well as a beta 1 precursor. Immunofluorescence of BAECs plated on laminin, fibronectin, and fibrinogen reveals different matrix-binding specificities of each of these integrin subclasses. By 1 h after plating, organization of beta 1 integrin into fibrillar streaks is influenced by laminin and fibronectin, whereas beta 3 integrin punctate organization is influenced by fibrinogen and the integrin spatial distribution changes with time in culture. In contrast, the nonintegrin laminin-binding protein LB69 only organizes after cell-substrate contact is well established several hours after plating. Migration of BAECs is also mediated by both integrin and nonintegrin matrix-binding proteins. Specifically, BAEC migration on laminin is remarkably sensitive to RGD peptide inhibition, and, in its presence, beta 1 integrin organization dissipates and reorganizes into perinuclear vesicles. However, RGD peptides do not alter LB69 linear organization during migration. Similarly, agents that block LB69--e.g., antibodies to LB69 as well as YIGSR-NH2 peptide--do not inhibit attachment of nonmotile BAECs to laminin. However, both anti-LB69 and YIGSR-NH2 inhibit late adhesive events such as spreading. Accordingly, we propose that integrin and nonintegrin extracellular matrix-binding protein organizations in BAECs are both temporally and spatially segregated during attachment processes. High affinity nonintegrin interaction with matrix may create necessary stable contacts for longterm attachment, while lower affinity integrins may be important for initial cell adhesion as well as for transient contacts of motile BAECs. [less ▲]

Attitude face au choix vocationnel chez des adolescents maghrébins: Dynamique conflictuelle à travers T.A.T. et Rorschach

in Bulletin de Psychologie (1990), 43(396), 705-715

Des pièges à indices olfactifs pour détecter la présence de la loutre (Lutra lutra) ?

in Cahiers d'Ethologie (1990), 10(1), 105-110

In low otter density areas, the presence of the species is fairly difficult to ascertain. Such areas however need more attention than others with respect to the otter conservation. The authors have thus ... [more ▼]

In low otter density areas, the presence of the species is fairly difficult to ascertain. Such areas however need more attention than others with respect to the otter conservation. The authors have thus attempted to test a quick field method to give evidence of the presence of surviving animals. They set stone piles at 63 stations scattered on three river system of Southern Belgium where tracks or signs of otter were recently recorded. In ordre to give the otters a stimulus to defecate, these stations were provided with foreign spraints and then monitored once a week during 2 months (winter '88/'89 and spring '89). Unfortunately enough, no positive result was obtained in this way. [less ▲]

A fresh look on confidence marking

(1990)

Note taking behaviors studied with the help of hypermedia

in Leclercq, Dieudonné; Estes, N.; Heene, J. (Eds.) Proceedings of the 7th International Conference on Technology and Education : New pathways to learning through educational technology (1990)

The vacuum Ultraviolet Photoabsorption and Photoelectron Spectroscopy of Fluoroethylenes. The 1,1-, cis- and trans-C2H2FCl.

in Chemical Physics (1990), 146

The vacuum ultraviolet absorption spectra of the three fluorochloroethene isomers were measured in the 6-13 eV photon energy range. Additionally, the HeI and NeI photoelectron spectra were recorded. The ... [more ▼]

The vacuum ultraviolet absorption spectra of the three fluorochloroethene isomers were measured in the 6-13 eV photon energy range. Additionally, the HeI and NeI photoelectron spectra were recorded. The assignment of the various photoelectron bands is based on MNDO calculations. The vaccum UV absorption spectral features were classified in terms of Rydberg series converging to the first and second ionization energy. Besides the typical pi-pi* transition, other valence transitions were observed and tentatively assigned. In the geminal isomer spectrum the dominant Rydberg series converge to the first ionization limit at 10.02 eV, in the cis and trans isomers the most intense Rydberg transitions converge to the second ionization energy at 11.87 and 12.03 eV respectively. The first ionization energies of these latter compounds, obtained by Rydberg series analysis, are 9.89 and 9.87 eV respectively. An assignment of the vibrational structure observed in both spectra is proposed. [less ▲]

Mise au point d'une épreuve d'évaluation des capacités de planification destinée à des cadres supérieurs

in Informatique et différences individuelles (1990)

Un outil informatisé d'évaluation des capacités cognitives de planification a été élaboré (TICAPLAN) afin de pouvoir être utilisé dans le contexte de la sélection de cadres supérieurs. Les qualités ... [more ▼]

Un outil informatisé d'évaluation des capacités cognitives de planification a été élaboré (TICAPLAN) afin de pouvoir être utilisé dans le contexte de la sélection de cadres supérieurs. Les qualités métriques de l'outil ont été étudiées notamment par comparaison avec une version similaire "papier-crayon". [less ▲]