CDS Special Publication n° 9: International Directory of Professional Astronomical Institutions 1987

in Bulletin d'Information du Centre de Données Stellaires (1986), 31

Not Available

La perception du temps chez l'animal

in La recherche (1986), 182

Schéma directeur de l'informatisation d'une exploitation agricole

in Revue de l'Agriculture (1986), 39(6), 1315-1330

BW Vulpeculae - A coordinated campaign of photoelectric photometry from thirteen observatories

in Astronomy and Astrophysics. Supplement Series (1986), 66

This paper contains the fully reduced observational data on the Beta Cep star BW Vul, which were obtained in the summer of 1982 during an international campaign at thirteen observatories in the northern ... [more ▼]

This paper contains the fully reduced observational data on the Beta Cep star BW Vul, which were obtained in the summer of 1982 during an international campaign at thirteen observatories in the northern hemisphere. Useful measurements were made during a total of 486 hours. All observations have been assigned proper weights and were binned in time intervals of 90 seconds. In this manner the observations were combined into single data points which resulted in about 6000 mean differential measurements. A preliminary ephemeris for 1982 is derived, and a mean lightcurve is given. The results indicate a fair degree of stability in the shape and in the amplitude of the lightcurve. Possible variations exist in the morphology of the stillstand phenomenon. [less ▲]

Les résultats de l'enseignement individualisé aux Etats-Unis

in Revue de l'Organisation des Etudes (1986)

AE-D measurements of the NO geomagnetic latitudinal distribution and contamination by N(+)(5S) emission

in Journal of Geophysical Research (1986), 91

Measurements of the NO gamma(1,0) band resonance scattering distribution obtained with the Atmosphere Explorer D satellite have been inverted to generate maps of the meridional distribution of nitric ... [more ▼]

Measurements of the NO gamma(1,0) band resonance scattering distribution obtained with the Atmosphere Explorer D satellite have been inverted to generate maps of the meridional distribution of nitric oxide between 90 and 160 km. It is shown that the results are better organized in terms of geomagnetic rather than geographic latitudes, especially at high latitudes. In particular, the presence of an E region maximum associated with the summer auroral zone is clearly demonstrated. The existence below the NO peak of larger concentrations in the winter than in the summer hemisphere is also observed. Comparison between calculations and rocket observations of the 2143-A doublet emission indicates that the quantum yield of N(+)(5S) is considerably less than unity. The possible contamination of the observations by this emission is shown to be negligible in these observations. [less ▲]

Le mélanome B16 de la souris en culture à trois dimensions

in Bulletin de l'Association des Anatomistes (1986), 70(210), 21-4

Multicellular spheroids composed of mouse B16 melanoma cells have been prepared in non agitated culture on solid agar. Cells present frequent contacts and an extracellular matrix appears during ... [more ▼]

Multicellular spheroids composed of mouse B16 melanoma cells have been prepared in non agitated culture on solid agar. Cells present frequent contacts and an extracellular matrix appears during cultivation (up to 2 months in agitated suspension); it contains laminin, fibronectin and collagen I, III and IV. Cellular differentiation takes place inside these spheroids (melanogenesis progressively increases), but a relatively intense cell proliferation rate is also maintained. [less ▲]

Contribution functions and the depths of formation of spectral lines

in Astronomy and Astrophysics (1986), 163

A rigorous expression is derived for the contribution function to the spectral line depression in a stellar atmosphere; this, in effect, gives the contribution of the different atmospheric layers to the ... [more ▼]

A rigorous expression is derived for the contribution function to the spectral line depression in a stellar atmosphere; this, in effect, gives the contribution of the different atmospheric layers to the formation of the line depression. This contribution function is the solution of the transfer equation for the line depression. It is the only appropriate distribution function for the computation of the depths of formation of spectral lines. It indicates, in contrast to some earlier contribution functions, that a faint spectral line is not necessarily formed in the same layers as the continuum. The response function of the line depression to a given perturbation is briefly discussed. [less ▲]

Propriétés et indications des diurétiques d'épargne potassique

in Revue Médicale de Liège (1986), 41(9), 330-336

Les diurétiques d'épargne potassique se répartissent en deux groupes: les inhibiteurs compétitifs de l'aldostérone représentés par la spironolactone et ses métabolites canrénone et acide canrénoïque, d ... [more ▼]

Les diurétiques d'épargne potassique se répartissent en deux groupes: les inhibiteurs compétitifs de l'aldostérone représentés par la spironolactone et ses métabolites canrénone et acide canrénoïque, d'une part, et l'amiloride et le triamtérène d'autre part. Agissant au niveau du tube distal, l'effet de ces diurétiques est caractérisé par un effet natriurétique faible, mais surtout une diminution de l'excrétion urinaire d'ions K+ et H+. De par leur mode d'action, le principal effet secondaire est représenté par le risque d'hyperkaliémie. Certains effets secondaires liés à la structure même de la molécule en limitent l'utilisation chronique tels les effets anti-androgènes de la spironolactone: gynécomastie, impuissance, trou bles des règles, etc. .. En dehors de l'hyperaldost éronisme primaire et secondaire, leur principale indication réside dans le traitement et la prévention de l'hypokaliémie induite par l'utilisation des thiazides, en particulier dans le traitement de l'hypertension artérielle. [less ▲]

L’ordinateur et l’apprentissage du latin

in Bulletin de la Fédération des Professeurs de Grec et de Latin [=FPGL] (1986), 49

L'informatique appliquée à l'histoire et à la critique des arts plastiques

in Archéo-log (1986), 1

Streptomyces K15 DD-peptidase-catalysed reactions with ester and amide carbonyl donors

in Biochemical Journal (1986), 235(1), 167-176

In water, the purified 26 000-Mr membrane-bound DD-peptidase of Streptomyces K15 hydrolyses the ester carbonyl donor Ac2-L-Lys-D-Ala-D-lactate (release of D-lactate) and the amide carbonyl donor Ac2-L-Lys ... [more ▼]

In water, the purified 26 000-Mr membrane-bound DD-peptidase of Streptomyces K15 hydrolyses the ester carbonyl donor Ac2-L-Lys-D-Ala-D-lactate (release of D-lactate) and the amide carbonyl donor Ac2-L-Lys-D-Ala-D-Ala (release of D-alanine) with accumulation of acyl- (Ac2-L-Lys-D-alanyl-)enzyme. Whereas hydrolysis of the ester substrate proceeds to completion, hydrolysis of the amide substrate is negligible because of the capacity of the K15 DD-peptidase for utilizing the released D-alanine in a transfer reaction (Ac2-L-Lys-D-Ala-D-Ala + D-Ala----Ac2-L-Lys-D-Ala-D-Ala + D-Ala) that maintains the concentration of the amide substrate at a constant level. In the presence of an amino acceptor X-NH2 (Gly-Gly or Gly-L-Ala) related to the Streptomyces peptidoglycan, both amide and ester carbonyl donors are processed without detectable accumulation of acyl-enzyme. Under proper conditions, the acceptor activity of water and, in the case of the amide substrate, the acceptor activity of the released D-alanine can be totally overcome so that the two substrates are quantitatively converted into transpeptidated product Ac2-L-Lys-D-Ala-NH-X (and hydrolysis is prevented). Experimental evidence suggests that the amino acceptor modifies both the binding of the carbonyl donor to the enzyme and the ensuing rate of enzyme acylation. [less ▲]

Streptomyces K15 DD-peptidase-catalysed reactions with suicide beta-lactam carbonyl donors

in Biochemical Journal (1986), 235(1), 177-182

The values of the kinetic parameters that govern the interactions between the Streptomyces K15 DD-peptidase and beta-lactam compounds were determined by measuring the inactivating effect that these ... [more ▼]

The values of the kinetic parameters that govern the interactions between the Streptomyces K15 DD-peptidase and beta-lactam compounds were determined by measuring the inactivating effect that these compounds exert on the transpeptidase activity of the enzyme and, in the case of [14C]benzylpenicillin and [14C]cefoxitin, by measuring the amounts of acyl-enzyme formed during the reaction. K15 DD-peptidase binds benzylpenicillin or cefoxitin at a molar ratio of 1:1. Benzylpenicilloate is the major product released during breakdown of the acyl-enzyme formed with benzylpenicillin. Benzylpenicillin is not a better acylating agent than the amide Ac2-L-Lys-D-Ala-D-Ala and ester Ac2-L-Lys-D-Ala-D-lactatecarbonyl-donor substrates. beta-Lactam compounds possessing a methoxy group on the alpha-face of the molecule show high inactivating potency. [less ▲]

MEMPHIS ON DOWN

in Soul Bag (1986), (106), 18-23

SOUVENIRS DE VOYAGE DANS LE SUD Mississippi, Memphis , .... ( photos: Richard Hite, David Evans, Sylvester Oliver, Willie Roy Sanders, Leroy Martin, Big Lucky Carter, Ben Wilson, Calvin Vollintine ... [more ▼]

SOUVENIRS DE VOYAGE DANS LE SUD Mississippi, Memphis , .... ( photos: Richard Hite, David Evans, Sylvester Oliver, Willie Roy Sanders, Leroy Martin, Big Lucky Carter, Ben Wilson, Calvin Vollintine, William Boogie Hubbard, Chicken George Walker, Uncle Ben, The Pattersonaires , Schwab Store, Mississppi à Memphis) [less ▲]

On the origin of bacterial resistance to penicillin: comparison of a beta-lactamase and a penicillin target

in Science (1986), 231

Structural data are now available for comparing a penicillin target enzyme, the D-alanyl-D-alanine-peptidase from Streptomyces R61, with a penicillin-hydrolyzing enzyme, the beta-lactamase from Bacillus ... [more ▼]

Structural data are now available for comparing a penicillin target enzyme, the D-alanyl-D-alanine-peptidase from Streptomyces R61, with a penicillin-hydrolyzing enzyme, the beta-lactamase from Bacillus licheniformis 749/C. Although the two enzymes have distinct catalytic properties and lack relatedness in their overall amino acid sequences except near the active-site serine, the significant similarity found by x-ray crystallography in the spatial arrangement of the elements of secondary structure provides strong support for earlier hypotheses that beta-lactamases arose from penicillin-sensitive D-alanyl-D-alanine-peptidases involved in bacterial wall peptidoglycan metabolism. [less ▲]

Photometric variability of some early-type stars

in Astronomy and Astrophysics. Supplement Series (1986), 63

Photometric observations of 12 variable early type stars are presented. The properties of individual stars are discussed, and an attempt is made to interpret their variability. The information presented ... [more ▼]

Photometric observations of 12 variable early type stars are presented. The properties of individual stars are discussed, and an attempt is made to interpret their variability. The information presented on the stars includes the HD number and other identification, the observing runs, the periodicity of the variations, an error estimate, and a tentative classification of each star. [less ▲]

International Directory of Astronomical Associations and Societies 1986 (IDAAS)

in Bulletin d'Information du Centre de Données Stellaires (1986), 30

Not Available

Spectroscopy of the QSSOs Q0118-031 A, B, C

in Monthly Notices of the Royal Astronomical Society (1986), 219

Optical spectroscopy of the three quasars Q0118-031A, B, C is presented. These objects which have emission redshifts of 12.445, 2.112 and 1.165 respectively, form a triplet on the plane of the sky with ... [more ▼]

Optical spectroscopy of the three quasars Q0118-031A, B, C is presented. These objects which have emission redshifts of 12.445, 2.112 and 1.165 respectively, form a triplet on the plane of the sky with separations of 4.8, 4.9 and 0.4 arcmins. Low dispersion spectra were obtained for all three objects, and intermediate dispersion spectra instrumental in the search for absorption lines were obtained for objects B and C. QSO B was found to have a rich absorption line spectrum, with definite systems at z(abs) 1.4648 and 2.0192. No absorption lines were found in the given spectrum for QSO C. Estimated column densities and velocity dispersions are given for the absorption systems in QSO B, and it is noted that the one at z(abs) = 1.4648 differs by only 2400 + or - 250 km/s from the emission redshift of QSO A. Since the spatial separation was predicted to be 1.2 Mpc, this absorption system may be due to material related to a galaxy in a cluster which also contains QSO A. It is suggested that this associated absorption is connected to the fact that quasars are located in regions of higher than average matter density. [less ▲]

OPTOPUS observations of Halley’s comet

in The Messenger (1986), 43

The multiobject spectrograph OPTOPUS, for use at the 3.6-m ESO telescope with the CCD detector, is described, and preliminary results of spectra obtained in December 1985 of selected regions in the coma ... [more ▼]

The multiobject spectrograph OPTOPUS, for use at the 3.6-m ESO telescope with the CCD detector, is described, and preliminary results of spectra obtained in December 1985 of selected regions in the coma of Halley's comet are presented. The instrument's 54 separately cabled optical fibers, whose input ends are located in the focal plane by connectors plugged into drilled starplates, enable light to be guided from freely distributed points in a 33 arcmin zone of the Cassegrain focal plane, to a common slit. The spectra show the presence of a very faint continuum, due to the scattering of solar line photons in the inner region of the coma, on which is superimposed the bright emission bands of molecules such as CN, C2, C3, and NH2. The spectra also indicate that the brightness decrease of molecular bands as a function of the projected radial distance is not the same for different molecules. 3-3 (PDF) ESO [less ▲]

Strychnopentamine

in Drugs of the Future (1986), 11(1), 42-44

Strychnopentamine is a new alkaloid found in Strychnos usambarensis leaves. It is the first alkaloid with five amines found in a Strychnos species; a methylpyrrolidinic group is joined to a bnzene ring of ... [more ▼]

Strychnopentamine is a new alkaloid found in Strychnos usambarensis leaves. It is the first alkaloid with five amines found in a Strychnos species; a methylpyrrolidinic group is joined to a bnzene ring of the corynane part of the molecule.Antimitotic activity tests were carried out on cultured HW165 hepatoma, B16 melanoma and Ehrlich ascites cells.Strychnopentamine was more active than other indole alkaloids isolated from the same species.Preliminary experiments were then undertaken to search for a possible antitumor activity in animals (Ehrlich ascites tumor cells in mice).At a single dose of 2mg, a very marked regression was obvious but mice showed signs of intoxication. Other experiments must be carried out , in order to establish a more exact structure-activity relationship and to discover less toxic substances. [less ▲]

Quelques données statistiques récentes sur la forêt wallonne.

in Bulletin de la Societe Royale Forestiere de Belgique (1986), 93(1), 1-22

L'inventaire des ressources forestières wallonnes, dont il a déjà été question à plusieurs reprises dans cette revue (FAGOT et al., 1984; LECOMTE et al., 1984; RONDEUX et al., 1983) a été réalisé de 1980 ... [more ▼]

L'inventaire des ressources forestières wallonnes, dont il a déjà été question à plusieurs reprises dans cette revue (FAGOT et al., 1984; LECOMTE et al., 1984; RONDEUX et al., 1983) a été réalisé de 1980 à 1983. Cet important travail a permis de dégager des résultats inédits sur le visage forestier de la Wallonie et sur l'état actuel des ressources ligneuses (RONDEUX et al., 1984a). La présente étude a pour objet de réunir, sous une forme aussi synthétique que possible, un ensemble de résultats concernant les étendues boisées ainsi que les volumes des peuplements actuellement sur pied. Après avoir rappelé brièvement les caractéristiques générales de l'inventaire (paragraphe 2), nous envisagerons les méthodes auxquelles nous avons eu recours pour estimer les surfaces et les volumes (paragraphe 3), puis nous évoquerons les conventions qui ont été retenues en matière de calculs (paragraphe 4). Nous présenterons ensuite plusieurs tableaux de résultats établis selon différents critères, par provinces et par régions forestières (paragraphe 5). Nous mettrons aussi l'accent sur les caractéristiques principales de notre patrimoine forestier (paragraphe 6) et, en guise de conclusion, nous soumettrons à l'attention du lecteur quelques chiffres facilement mémorisables (paragraphe 7). [less ▲]

Efficacy of ivermectin and levamisole against immature Dictyocaulus viviparus in cattle

in Veterinary Record : Journal of the British Veterinary Association (1986), 118

Eighteen calves aged approximately three months were each infected with Dictyocaulus viviparus larvae at a rate of 30/kg bodyweight. Seven days later they were randomly allocated to three groups of six ... [more ▼]

Eighteen calves aged approximately three months were each infected with Dictyocaulus viviparus larvae at a rate of 30/kg bodyweight. Seven days later they were randomly allocated to three groups of six animals. Calves of group 1 were controls. Calves of group 2 were given levamisole at a dose rate of 10 mg/kg and calves of group 3 were given ivermectin at a dose rate of 200 micrograms/kg. The anthelmintic activity of these two drugs was compared using clinical, functional, parasitological and pathological parameters. The results showed that the efficacy of ivermectin, given at a therapeutic dose, against immature D viviparus was higher than that of levamisole, given at double the recommended dose [less ▲]

Les algies faciales.

in Revue Médicale de Liège (1986), 41(9), 342-8

Testosterone-induced brain aromatase is sexually dimorphic.

in Brain Research (1986), 370(2), 285-93

Female quail are less sensitive than males to the activating effects of testosterone (T) on behavior. Testosterone induces hypothalamic aromatase activity more efficiently in males than in females (higher ... [more ▼]

Female quail are less sensitive than males to the activating effects of testosterone (T) on behavior. Testosterone induces hypothalamic aromatase activity more efficiently in males than in females (higher Vmax but similar Km). As the conversion of T to estradiol (E2) is important for the activation of male sexual behavior, we propose that the incapacity of the female hypothalamus to produce behaviorally active E2 contributes to their insensitivity to T. The 5 alpha-reductase, which converts T into 5 alpha-dihydrotestosterone (5 alpha-DHT), is induced by T specifically in the anterior hypothalamus of both sexes. [less ▲]

Seasonal changes in some plasma hormones in pigeons: diurnal variation under natural photoperiods with constant or seasonally changing ambient temperature.

in Comparative Biochemistry and Physiology (1986), 84(1), 33-8

The diurnal variations of several plasma hormones and free fatty acids (FFA) were studied during periods in summer and winter for pigeons reared either outdoors or indoors. The latter were subjected to ... [more ▼]

The diurnal variations of several plasma hormones and free fatty acids (FFA) were studied during periods in summer and winter for pigeons reared either outdoors or indoors. The latter were subjected to constant temperature and naturally varying photoperiods. A significant seasonal variation in the mean daily levels of triiodothyronine (T3), thyroxine (T4), corticosterone (B), lutropin (LH) and FFA was seen in the outdoor birds and in the T4 and B levels of indoor birds. The diurnal variation of hormone levels was generally more pronounced in winter in both groups. Cold ambient temperature significantly decreased the plasma LH level and potentiated the increasing effect of short photoperiod on plasma B level. Diurnal variation of plasma FFA level seems to be under the control of photoperiod, without any effects due to the ambient temperature. No significant correlation was found between FFA and GH concentrations. [less ▲]

Radial shape of the optical potential for 35 an 11 MeV protons on targets with mass number 10 < A < 80

in Physical Review. C : Nuclear Physics (1986), 34

Endocrine regulation of postpartum ovarian activity in cattle : a review

in Reproduction Nutrition Development (1986), 26(6), 1219-1239

Cloning and amplified expression in Streptomyces lividans of a gene encoding extracellular beta-lactamase from Streptomyces albus G

in Gene (1986), 42

A 4.9-kb DNA fragment containing the bla gene for the extracellular beta-lactamase (BLA) of Streptomyces albus G was cloned in Streptomyces lividans using the conjugative, low-copy-number plasmid pIJ61 as ... [more ▼]

A 4.9-kb DNA fragment containing the bla gene for the extracellular beta-lactamase (BLA) of Streptomyces albus G was cloned in Streptomyces lividans using the conjugative, low-copy-number plasmid pIJ61 as vector. No expression of bla was observed when this DNA fragment was introduced into Escherichia coli HB101 on a plasmid vector. A 1.5-kb PstI-SstI fragment containing the bla gene was cloned in S. lividans on the nonconjugative, high-copy-number plasmid pIJ702. A tenfold higher yield of BLA was obtained from S. lividans carrying this plasmid than from S. albus G grown under optimal production conditions. The BLA from the clone reacts with beta-iodopenicillanate according to a branched pathway which is characteristic of the original S. albus G BLA enzyme. [less ▲]

Compte-rendu de l'ouvrage de S. BOESCH GAJANO, Collona di studi storici. Culto dei santi, Rome, 1984

in Moyen Age (Le) (1986)

Sur le comportement des assemblages semi-rigides et leur influence dans l'étude des structures en acier

in Annales des Travaux Publics de Belgique = Tijdschrift der Openbare Werken van Belgie (1986), N°2

Convergent thin-shell models using cartesian components of the displacements

in International Journal of Engineering Science (1986), 24(3), 353-365

Starting from the establishment of a deep-shell theory using cartesian components of the displacements, two simplifications of it are considered in the frame of moderate deflections, in view of their ... [more ▼]

Starting from the establishment of a deep-shell theory using cartesian components of the displacements, two simplifications of it are considered in the frame of moderate deflections, in view of their finite element implementation. The first one, consisting simply of the use of plane elements, is proved to converge to the deep-shell solution when the mesh is refined, and the rate of convergence is evaluated. A more refined approach is presented, which gains one order of convergence from the former one and reduces to the Marguerre shallow-shell theory when this one is applicable, a condition which is made precise in the text. [less ▲]

Monoclonal antibodie to hemagglutinin-neuraminidase and fusion glycoproteins of Newcastle Disease Virus : relationship between glycosylation and reactivity.

in Journal of Virology (1986), 57

Hybridization of bovine Escherichia coli isolates with genes probes for four enterotoxins (StaP, STaH, STb, LT) and one adhesive factor (K99)

in American Journal of Veterinary Research (1986), 47

Complex populations of minor pathogens associated with roots from barley plants infected by barley yellow mosaic virus.

in Parasitica (1986), 42(4),

Rôle d'un service d'urgence chirurgicale dans la prise en charge d'une catastrophe engendrant une grande quantité de patients brûlés

in Acta Chirurgica Belgica (1986), 86

Frontières d'efficacité et performance technique des chemins de fer

in Annals of Public and Cooperative Economics = Annales de l'Economie Publique, Sociale et Coopérative (1986)

La loi du 21 février 1983 relative à la vente de certains objets abandonnés, une loi utile?

in Annales de Droit de Liège (1986), n°1

Developmental changes in interstitial collagens of fetal rat genital ducts

in Developmental Biology (1986), 113(2), 364-372

The distribution of interstitial collagen types I and III was studied by immunocytochemistry in the mesenchyme of progressing and regressing mesonephric and paramesonephric ducts of male and female rat ... [more ▼]

The distribution of interstitial collagen types I and III was studied by immunocytochemistry in the mesenchyme of progressing and regressing mesonephric and paramesonephric ducts of male and female rat fetuses from the age of 15 days until birth. Immunocytochemistry revealed a collagen-poor mesenchymal area around the genital ducts and in continuation with the coelomic epithelium on the lateral edge of the mesonephric ridge of 15-day-old fetuses. Ultrastructurally, collagen fibrils were accumulated along the continuous lamina densa of the mesonephric ducts, whereas they were absent on the medial side of the male and female paramesonephric ducts. In males, the amount of collagen fibrils increased with the histological maturation of the mesenchyme around the mesonephric duct, whereas around the regressing paramesonephric duct collagens disappeared from the basement membrane region and the surrounding mesenchyme of the 16-day-old male duct. After the completion of the paramesonephric regression, the mesenchyme acquired a uniformly collagen containing interstitial matrix. In females, the collagens increased in the mesenchyme around the progressing paramesonephric duct, and the original site of the regressing mesonephric duct became occupied with a collagen-containing mesenchyme by the age of 19 days. The results suggest a close structural linkage between the mesonephric duct and the established early paramesonephric duct. The differences in the developmental maturation of the periductal mesenchyme and the observed changes in the composition of the interstitial matrix probably reflect the functional differences in the regulatory factors acting on the progression and regression of the male and female genital ducts. [less ▲]

Dangers des substances anabolisantes en engraissement

in Les Elevages belges (1986), 8

La charpente de la maison Curtius et son analyse dendrochronologique

in Bulletin de l'Institut Archéologique Liégeois (1986), 98

Diurnal variations of sexual receptivity in the female Japanese quail (Coturnix coturnix japonica).

in Hormones and Behavior (1986), 20(1), 13-33

A series of experiments was performed to study the changes during the day of female receptivity in Japanese quail. In each experiment, the frequency of squatting and the percentage of male approaches ... [more ▼]

A series of experiments was performed to study the changes during the day of female receptivity in Japanese quail. In each experiment, the frequency of squatting and the percentage of male approaches which were followed by squatting increased at the end of the day, approximately 11 to 13 hr after lights on (in a photoperiod of 16L:8D). In some cases this increased receptivity was associated with a significant decrease of the long-avoid frequency. Analyses are presented which demonstrate that the increased receptivity at the end of the day is not directly caused by the oviposition and does not result directly from changes in the behavior of the male stimuli. This is strongly supported by the observation that the increase in receptivity was observed at the same time after lights on (but different clock times) in two groups of females which were raised in two different photoperiods shifted by 6 hr and tested with the same group of males raised in one of the two photoperiods. The increase in receptivity coincides with an increase in plasma estradiol and progesterone. Considering that this behavior is suppressed by ovariectomy, it is argued that the daily changes in receptivity could be controlled by the hormonal changes associated with the ovulatory cycle. [less ▲]

Intramolecular dynamics by photoelectron spectroscopy. III.Predissociation of the B 2B2 state of H2O+ and D2O+ by a semiclassical approach

in Chemical Physics (1986), 110

The initial wave packets and H2O+ and D2O+ in their B 2B2 /2A' states are expanded in the frozen gaussian basis set proposed by Heller. The gaussian functions are propagated on the adiabatic and diabatic ... [more ▼]

The initial wave packets and H2O+ and D2O+ in their B 2B2 /2A' states are expanded in the frozen gaussian basis set proposed by Heller. The gaussian functions are propagated on the adiabatic and diabatic potential energy surfaces resulting from the conical intersection with the A 2A1/2A' states. Autocorrelation functions are calculated separately for the adiabatic and the diabatic motions of the nuclei. These autocorrelation functions are compared with their experimental counterparts. The agreement is qualitatively good and the isotope effects are well accounted for. [less ▲]

Screening of cytotoxic activities of Strychnos alkaloids ( methods and results)

in Journal of Ethnopharmacology (1986), 15

The potential cytotoxic activities of 46 alkaloids isolated from different Strychnos species were tested on different cancer or normal cells cultured in vitro. The authors use a relatively simple ... [more ▼]

The potential cytotoxic activities of 46 alkaloids isolated from different Strychnos species were tested on different cancer or normal cells cultured in vitro. The authors use a relatively simple microtest which gives good reproducibility. Most of the active compounds belong to the usambarane skeleton but other structure-activity relationships are being discussed. [less ▲]

L'anabolisation et ses problèmes

in Bulletin des Recherches Agronomiques de Gembloux (1986), 20

Comparison of monoamine concentrations in the brains of adult male and female Japanese quail.

in Poultry Science (1986), 65(7), 1413-20

A fluorometric assay measuring brain tissue concentrations of norepinephrine, dopamine, and serotonin has been validated for Japanese quail. Accuracy, precision, specificity, and parallelism were ... [more ▼]

A fluorometric assay measuring brain tissue concentrations of norepinephrine, dopamine, and serotonin has been validated for Japanese quail. Accuracy, precision, specificity, and parallelism were determined. The sensitivity of the assays was 6 ng/tube, which allowed individual assay of 1 to 2 mg hypothalamic tissue. In Experiment 1, relatively large areas of brain from adult, reproductively active males and females were found to differ significantly in norepinephrine content in optic lobes and for dopamine in right telencephalon. A microdissection technique was used in Experiment 2 to sample small portions of hypothalamic tissue. Sex differences were observed for norepinephrine in the sections containing the lobus paraolfactorius and the preoptic, anterior, and medial hypothalamus. Differences in monoamine content were most apparent when smaller areas dissected by microdissection were analyzed. These results give evidence for sex differences in the monoamine content in specific areas of the brain. [less ▲]

Synthesis of 75Se-2-phenyl-1,2-benzisoselenazol-3-(2H)-one (PZ 51; EBSELEN*). A novel biologically active organo-selenium compound

in Journal of Labelled Compounds & Radiopharmaceuticals (1986), 23(1), 59-65

The preparation of 75Se-ebselen (75Se-PZ 51) in a high radiochemica] yield (~40 %) and with a specific act'ivity of 240 mCi/mM (8.9 GBq/mM) is described.

Antibodies to laminin in preeclampsia.

in Kidney International (1986), 29(5), 1050-57

Laminin is a large basement membrane glycoprotein localized in the trophoblast, glomerular basement membrane and in the mesangial matrix of human glomeruli. It promotes the attachment of epithelial cells ... [more ▼]

Laminin is a large basement membrane glycoprotein localized in the trophoblast, glomerular basement membrane and in the mesangial matrix of human glomeruli. It promotes the attachment of epithelial cells to basement membrane collagen. We have found that 14 sera from 52 patients with severe preeclampsia or eclampsia contain IgG and IgM antibodies which react with placental and kidney basement membranes. These antibodies were specific for laminin and did not react with other basement membrane proteins. They were able to fix complement. They have been demonstrated by radial immunodiffusion, radioimmunoassay and immunofluorescence blocking studies. In primary cultures they were shown to impair the attachment of trophoblast cells to basement membrane collagen. High levels of circulating immune complexes were detected only in sera from preeclamptic patients with circulating antibodies to laminin. The auto-antibodies to laminin could play a major role in the pathogenesis of severe preeclampsia by impairing the attachment of trophoblast cells to placental basement membranes and by fixation to the glomerular basement membranes and mesangial matrix. [less ▲]

Distribution of extracellular matrix glycoproteins during normal development of human kidney. An immunohistochemical study.

in Laboratory Investigation : Journal of Technical Methods & Pathology (1986), 54(4), 394-401

The distribution of types I, III, and IV collagens, fibronectin, laminin, and heparan sulfate proteoglycan during human fetal kidney development has been studied by indirect immunofluorescence ... [more ▼]

The distribution of types I, III, and IV collagens, fibronectin, laminin, and heparan sulfate proteoglycan during human fetal kidney development has been studied by indirect immunofluorescence. Fibronectin and interstitial collagens types I and III are present in undifferentiated mesenchyme, whereas the intrinsic basement membrane components, type IV collagen, laminin, and heparan sulfate proteoglycan are not detected. In differentiated cortex, types I and III collagens are detected only as interstitial connective fibers, whereas fibronectin is found in both interstitium and glomeruli where its distribution is dependent on the stage of maturation. It is found in both the mesangium and along capillary walls of immature glomeruli, and principally in the mesangium of mature ones. Basement membrane components delineated the branching ureteric bud. They also outlined the structures of the earliest stage of nephrogenesis (epithelial differentiation). In mature nephrons, they are found along glomerular, capsular, and tubular basement membranes. [less ▲]

Logical description of bovine herpesvirus type 1 latent infection.

in Journal of General Virology (The) (1986), 67 ( Pt 5)

Description of the interactions between bovine herpesvirus type 1 (BHV-1) and cattle was performed by the method known as kinetic logic. This logical formalization uses variables with two possible values ... [more ▼]

Description of the interactions between bovine herpesvirus type 1 (BHV-1) and cattle was performed by the method known as kinetic logic. This logical formalization uses variables with two possible values, 1 and 0, which tell whether an element is present or not at a significant level. To each variable is associated a function which tells if the element is being produced at a significant rate. The temporal relation between a variable and its associated function is given by specific time delays. The BHV-1 infection system is described by a set of five logical equations which tell in what conditions each function is on or off. The five functions are: V, development of viral multiplication; R, development of reactivation of the latent virus; A, development of an immune response; G, establishment of the viral genome; M, development of a memory of a first immune response. Several examples are detailed in a dynamic analysis, in connection with known experimental data. [less ▲]

Development of specific antibodies mediating antibody-dependent cell-mediated cytotoxicity following experimental infection of cattle with bovine herpesvirus 1 and subsequent viral reactivation.

in Veterinary Microbiology (1986), 11(1-2), 51-9

Evolution of sensitizing antibodies involved in antibody-dependent cell-mediated cytotoxicity (ADCC), antibody-complement cell lysis and complement-facilitated ADCC was followed in bulls after primary ... [more ▼]

Evolution of sensitizing antibodies involved in antibody-dependent cell-mediated cytotoxicity (ADCC), antibody-complement cell lysis and complement-facilitated ADCC was followed in bulls after primary infection by a wild strain of infectious bovine rhinotracheitis virus (bovine herpesvirus 1; BHV-1) and after experimental reactivation of the virus. These antibodies were detected between the 4th and the 7th day after primary infection, reached a maximum level after 2 weeks and rose slightly after reactivation of the virus following dexamethasone treatment. The presence of endogenous complement slightly enhanced the ADCC reaction. [less ▲]