Stability and accuracy of the UVBY system

in Astronomy and Astrophysics (1984), 141

In order to evaluate the transformation errors for stars of various types and classes, the author has simulated observations made with standard and non-standard equipments. Large deviations which cannot ... [more ▼]

In order to evaluate the transformation errors for stars of various types and classes, the author has simulated observations made with standard and non-standard equipments. Large deviations which cannot be corrected are observed mainly for objects outside the range 0.0 < b-y < 0.4 and in the u filter. The rectangular passbands have many advantages however. They can be very stable and are accurately reproducible. Hence the problem of nontransformable outputs may not exist between such systems. Since many uvby observations are to be collected with such equipments, it could be advantageous to define a new standard "rectangular" uvby system along with the conventional one. [less ▲]

Une technique alimentaire permettant à la vache d'exprimer au maximum son potentiel richesse du lait (matière grasse et protéine).

Scientific conference (1984, November)

James BOOKER , Mr. Mystery ( LP sleeve notes, enregistrements, photo )

Learning material (1984)

notes de pochette , LP Sundown CG 709-09 ; 6 enregistrements de James BOOKER réalisés à Liège en novembre 1976 par R.Sacre : photo James Booker

Utilisation rationnelle des méthodes de calcul automatique des champs quasi-statiques.

in Bossavit, Alain (Ed.) Actes du colloque MODELEC (1984, October 22)

Dix années de développement et d'utilisation des méthodes :élément fini, différence finie, simulation de charges, intégrales de surface appliquées à l'électromagnétisme.

Perspectives nouvelles pour l'évaluation de la myoglobine sérique dans le décours de l'infarctus du myocarde

Conference (1984, October 06)

Les variations du champ magnétique de HD 32633

in Astronomy and Astrophysics (1984), 139

The magnetic-field measurements of HD 32633 by Borra and Landstreet (1980) are compared with the values of H[SUB]e[/SUB] measured by Babcock (mostly unpublished) and those published by Preston and StepieÅ ... [more ▼]

The magnetic-field measurements of HD 32633 by Borra and Landstreet (1980) are compared with the values of H[SUB]e[/SUB] measured by Babcock (mostly unpublished) and those published by Preston and StepieÅ (1968), in order to improve the value obtained for the period. The result is P = 6[SUP]d[/SUP].42998±0[SUP]d[/SUP].00012. As found previously (Renson, 1969) from Babcock's observations alone, the variation is highly anharmonic and asymmetric, the ascending part of the curve (from negative to positive values of H[SUB]e[/SUB]) being much steeper than the descending part. Moreover, in the descending part, there is at least one bump, which is also very difficult to explain within the framework of the models proposed up to now. [less ▲]

A purification procedure of the tetrodotoxin binding component coming from the electroplaxes of E. electricus.

in Changeux, J.P.; Maelicke, A; Neumann, E (Eds.) Molecular Basis of Nerve Activity (1984)

Leçons sur les tenseurs cartésiens

Learning material (1984)

Vecteurs ; caractère tensoriel ; tenseurs d'ordre 0 ; tenseurs du second ordre ; tenseurs d'ordre supérieur ; quelques opérations sur lers tenseurs ; gradient ; produit mixte de trois vecteurs ; produit ... [more ▼]

Vecteurs ; caractère tensoriel ; tenseurs d'ordre 0 ; tenseurs du second ordre ; tenseurs d'ordre supérieur ; quelques opérations sur lers tenseurs ; gradient ; produit mixte de trois vecteurs ; produit vectoriel, alternateur et rotationnel ; produits d'alternateurs ; exemples d'application de l'alternateur ; tenseurs ymétriques et antisymétriques ; décomposition d'un tenseur du second ordre en parties symétrique et antisymétrique ; décomposition d'un tenseur en un tenseur isotrope et un déviateur ; directions principales d'un tenseur symétrique d'ordre deux ; décomposition polaire d'un tenseur du second ordre non dégénéré ; champs de tenseurs ; théorème de Gauss-Ostrogradski ; décomposition canonique du gradient d'un vecteur ;équations de compatibilité des déformations. Exercices. [less ▲]

Genetic regulation of hepatic steroid 16 alpha-hydroxylase activities in inbred strains of mice.

in Endocrinology (1984), 115

Steroid 16 alpha-hydroxylase activities and properties were studied in C57Bl/6J, 129/J, AKR/R, DBA/2J, C3H/I, and BALB/c mouse liver using four different substrates. The highest enzymatic activities were ... [more ▼]

Steroid 16 alpha-hydroxylase activities and properties were studied in C57Bl/6J, 129/J, AKR/R, DBA/2J, C3H/I, and BALB/c mouse liver using four different substrates. The highest enzymatic activities were measured in the female mice, with the exception of the 129/J females. As in the rat liver, the sexual differentiation of the steroid 16 alpha-hydroxylation observed in adult male and female mice took place at puberty. In the adult mouse liver, two steroid 16 alpha-hydroxylase activities (forms I and II) could be differentiated on the basis of their relative affinities for the various steroid substrates and their relative proportions in male and female mouse livers. In the immature mouse liver, no sexual differences could be detected, and the mice of both sexes presented phenotypes identical to those of the adult female. The adult 129/J females appeared genetically deficient with respect to the form I of the steroid 16 alpha-hydroxylase and presented a phenotype identical to that of the adult male mice of the various strains tested. Differences in hydroxylase activities between the C57Bl/6J and 129/J strains were investigated using standard genetic breeding protocols. Steroid 16 alpha-hydroxylase seemed to be inherited additively in the liver of the female mice obtained by crossing the C57Bl/6J male and the 129/J female or the 129/J male and the C57Bl/6J female. In the male mice, regardless of genotype, the observed phenotype was always identical to the two male parental types. Both hormonal and genetic regulations were responsible for the different phenotypes occurring in adult male and female C57Bl/6J and 129/J mouse livers. [less ▲]

Physiological studies of the pulmonary function in unsedated Friesian cattle

Doctoral thesis (1984)