Hot carbon stars - More about V348 SGR

in Quarterly Journal of the Royal Astronomical Society (1987), 28

New observational techniques (sensitive receivers, access to ultraviolet and infrared spectroscopy), as well as recent theoretical investigations on advanced stages of stellar evolution focus attention ... [more ▼]

New observational techniques (sensitive receivers, access to ultraviolet and infrared spectroscopy), as well as recent theoretical investigations on advanced stages of stellar evolution focus attention again on hydrogen-poor and helium-rich objects known as "carbon stars". The case of the hot peculiar variable V348 Sgr is discussed. New visible and infrared observations are presented, but the exact nature of the star remains much of an enigma. [less ▲]

Teacher's profile in its relation with the attainment of specific objectives in a LOGO environment

Conference (1987, September)

Hormonal Control of Female Sexual Behavior in the Japanese Quail

in Hormones & Behavior (1987), 21(3), 288-309

Four experiments were carried out to study the hormonal control of female receptivity and proceptivity in Japanese quail. Both aspects of reproductive behavior can be activated in a dose-dependent manner ... [more ▼]

Four experiments were carried out to study the hormonal control of female receptivity and proceptivity in Japanese quail. Both aspects of reproductive behavior can be activated in a dose-dependent manner by injections of estradiol benzoate (EB). Progesterone (P) given in addition to suboptimal doses of EB has little additional stimulatory effect. Other aspects of the reproductive physiology such as enlargement of the cloacal diameter and growth of the oviduct also seem to be controlled primarily by estrogens with little or no additive effect of P. These conclusions were confirmed by injecting egg-laying females with an antiestrogen, tamoxifen, or an antiprogestin, RU38486. Only the former had marked effects on sexual receptivity, cloacal diameter, and oviduct weight. The inhibiting effects of tamoxifen could easily be reversed by injecting females with large doses of estrogen, which demonstrates that tamoxifen acts on an estrogen-dependent mechanism and not through nonspecific effects. [less ▲]

L'intérêt développemental des outils informatisés dans la prise en charge des personnes handicapés mentales et sociales

in Les Cahiers de l'UNADRIO (1987), 6

Steroid Hormones, Behavior and Sexual Dimorphism in Animals and Men: The Nature-Nurture Controversy

in Experimental & Clinical Endocrinology (1987), 90(2), 129-56

De laatste der verdoemden

in Dietsche Warande en Belfort (1987), 132(6), 47-50

This is a review of a volume of poetry by L.M. van den Brande.

Nucleotide sequence of the gene encoding the Streptomyces albus G beta-lactamase precursor

in European Journal of Biochemistry (1987), 166(2), 345-350

A 1400-base DNA fragment, which contains the gene encoding the extracellular active-site serine beta-lactamase of Streptomyces albus G previously cloned into Streptomyces lividans [Dehottay et al. (1986 ... [more ▼]

A 1400-base DNA fragment, which contains the gene encoding the extracellular active-site serine beta-lactamase of Streptomyces albus G previously cloned into Streptomyces lividans [Dehottay et al. (1986) Gene 42, 31-36], was sequenced. The gene codes for a 314-amino-acid precursor, the N-terminal region of which has the characteristics of a signal peptide. The beta-lactamase as excreted by the host strain S. lividans PD6 has a ragged N-terminus, indicating either the presence of a leader peptidase of poor specificity or the action of an aminopeptidase. The primary structure (as deduced from the nucleotide sequence) was confirmed by amino acid sequencing of a 16-residue stretch at the amino terminus of the protein, a 12-residue stretch containing the active-site serine [De Meester et al. (1987) Biochem. J. 244, 427-432] and a 23-residue stretch obtained by trypsin digestion of the protein. The beta-lactamase belongs to class A, has three half-cystine residues (one of which occurs on the amino side of the active-site serine) and is inactivated by thiol reagents. Putative ribosome binding site and terminator region were identified. [less ▲]

The missing opacity and the temperature calibration of solar-type stars

in Astronomy and Astrophysics (1987), 181

The novel temperature calibration of some color indices presented for G and F dwarfs is based on the IR flux method and extends the work of Saxner and Hammarback (1985) to the Population II stars ... [more ▼]

The novel temperature calibration of some color indices presented for G and F dwarfs is based on the IR flux method and extends the work of Saxner and Hammarback (1985) to the Population II stars. Attention is given to the discrepancy between theoretical and empirical temperature calibrations. It is suggested that the most straightforward interpretation of the disagreement between empirical colors and some model predictions is that of the 'missing opacity' due to a veil of faint metal lines, present in the blue and UV regions of the spectra of solar-type and cooler stars, but excluded from the model. [less ▲]

Neuroendocrinology of the thymus

Conference (1987, June 22)

Les matrices identificatoires à l’oeuvre dans le mouvement ouvrier chrétien à l’heure du déclin du cléricalisme (1968-1996). Les relais politiques des organisations ouvrières chrétiennes en Wallonie.

Doctoral thesis (1987)

Le mouvement ouvrier chrétien, coupole de la confédération des syndicats chrétiens, de l'alliance nationale des mutualités chrétiennes, des coopératives chrétiennes, des jeunesses ouvrières chrétiennes ... [more ▼]

Le mouvement ouvrier chrétien, coupole de la confédération des syndicats chrétiens, de l'alliance nationale des mutualités chrétiennes, des coopératives chrétiennes, des jeunesses ouvrières chrétiennes, de Vie féminine et des Equipes populaires, a souvent été vu comme le pilier social du parti social chrétien. A l'inverse, celui-ci lui servait de relais politique privilégié. L'étude montre que le mouvement ouvrier chrétien a été déchiré par des tensions politiques fortes qui ont fait préférer à plusieurs dirigeants d'autres relais politiques que le PSC. [less ▲]