Les convulsions fébriles de l'enfant: leur pronostic et leur traitement

in Revue Médicale de Liège (1983), 38(23), 879-884

Photoelectric lightcurves and rotation period of the minor planet 201 Penelope

in Astronomy and Astrophysics. Supplement Series (1983), 54

Results of photoelectric observations of the asteroid 201 Penelope carried out at the European Southern Observatory and Perth Observatory during the 1980 opposition of the asteroid between October 6 and ... [more ▼]

Results of photoelectric observations of the asteroid 201 Penelope carried out at the European Southern Observatory and Perth Observatory during the 1980 opposition of the asteroid between October 6 and November 7 are presented. Observations were made in the standard UBV and Geneva systems at ESO, and in V-prime at Perth. Examination of composite light curves shows the presence of two distinct maxima and two distinct minima, with a total amplitude of the V light curve of 0.52 magnitudes. A mean synodic rotation period of 3 h, 44 min, 51.6 + or - 7.4 sec is derived. Using a mean phase coefficient beta[SUB]V[/SUB] = 0.037 mag/deg, a primary V (1,0) maximum of 8.51 + or - 0.01 magnitudes is obtained. Color indices are measured as B-V = 0.70 + or - 0.01 and U-B = 0.23 + or - 0.02 magnitudes, and previously reported color variations (Surdej and Cramer, 1980) are attributed to a failure in the reduction procedure. [less ▲]

Mieux "être": l'insecurité en question

in Revue d'action sociale (1983), N°6

Cerebral ischemic accidents in young patients, less than 45 years of age

in Semaine des Hôpitaux de Paris. Thérapeutique (1983), 59(37-38), 2642-2644

Les arts plastiques: du surréalisme aux murs du métro

in Wallonie-Bruxelles (1983), 1

La guattegaumerine, nouvel alcaloide bisbenzylisoquinoleinique de Guatteria gaumeri

in Planta Medica (1983), 49(9), 25-7

The aqueous-alcoholic extract of the bark of GUATTERIA GAUMERI (Mexican Annonaceae) is used for the treatment of cholelithiasis and hypercholesterolemia. Therefore it seems very interesting to perform a ... [more ▼]

The aqueous-alcoholic extract of the bark of GUATTERIA GAUMERI (Mexican Annonaceae) is used for the treatment of cholelithiasis and hypercholesterolemia. Therefore it seems very interesting to perform a phytochemical study of this drug in order to know its composition and to determine, if possible, all the active principles. We describe now the isolation of the main alkaloid named guattegaumerine. This new bisbenzylisoquinoline alkaloid has been assigned structure 1, on the basis of spectroscopic, chemical and chromatographic evidence. [less ▲]

A homologous radioimmunoassay for canine prolactin: plasma levels during the reproductive cycle

in Acta Endocrinologica (1983), 103

A method is described for the purification of canine prolactin, involving preparative isoelectrofocusing. Canine prolactin has a molecular weight of 23 000 daltons, an isoelectric point of 5.7 and ... [more ▼]

A method is described for the purification of canine prolactin, involving preparative isoelectrofocusing. Canine prolactin has a molecular weight of 23 000 daltons, an isoelectric point of 5.7 and exhibits a high degree of homogeneity in polyacrylamide gels stained by means of a silver method. A specific, homologous radioimmunoassay is described using the Bolton-Hunter method for preparation of the labelled ligand, with a sensitivity of 1.1 ng/tube. Basal plasma prolactin levels of 2-4 ng/ml obtained through the oestrous cycle remained fairly constant but a rise of 9 ng/ml was found at the end of disoetrus in nonpregnant bitches. Level also rose 30 days after mating to reach a peak of about 50 ng/ml near parturition and during early lactation. [less ▲]

Digital Line-artifact Removal

in Optical Engineering : The Journal of the Society of Photo-Optical Instrumentation Engineers (1983), 22(4), 479-484

Approche institutionnelle du premier surréalisme (1919-1924)

in Pratiques (1983), 38

Halato-telechelic polymers. VI. Viscoelastic properties of solutions of alkaline earth α, ω-dicarboxylatopolybutadiene

in Macromolecules (1983), 16(6), 996-1000

Alkaline earth alpha,omega-dicarboxylatopolybutadienesd issolved in a nonpolar solvent (an= 4600) display an attractive thermorheological simplicity and exhibit a secondary relaxation characteristic of ... [more ▼]

Alkaline earth alpha,omega-dicarboxylatopolybutadienesd issolved in a nonpolar solvent (an= 4600) display an attractive thermorheological simplicity and exhibit a secondary relaxation characteristic of the ionic component. The shear-thickening character of these solutions is to be outlined. Their deformation mechanism is controlled by the stability and the mean size of the ionic multiplets formed by the carboxylate end groups. The electrostatic origin of the viscoelastic behavior observed is well established by its dependence on solvent, temperature, and cation size. [less ▲]

Synthesis of chalcogeno lactones. II. 3, 4-dihydro-1 H-2-benzothiin-3-one, 3,4-dihydro-1H-2-benzoselenin-3-one and 3,4-dihydro-1H-2-benzotellurin-3-one

in Journal of Heterocyclic Chemistry (1983), 20(3), 811-812

The synthesis of 3, 4-dihydro-1H-benzothiin-3-one and its selenium and tellurium analogs is reported from o-bromomethylphenylacetyl chloride and sodium hydrogen chalcogenates, via phase-transfer catalysis.

3. Graangewassen - 3.3 Aktuele teelttechnieken in de intenseive graanteelt - 3.3.2. Zaaien, stikstofbemesting, anti-legeringsprodukten en gewasbescherming - 3.3.2.4 Zomertarwe

in Revue de l’Agriculture = Landbouwtijdschrift (1983), 36(3), 635-636

3. Graangewassen - 3.3 Aktuele technieken in de intenseive graanteelt - 3.3.2. Zaaien, stikstofbemesting, anti-legeringsprodukten en gewasbescherming - 3.3.2.6 Zomerharver

in Revue de l’Agriculture = Landbouwtijdschrift (1983), 36(3), 643-645

Modalités de semis, fumure à action antiverse et protection phytosanitaire, froment hiver

in Revue de l’Agriculture = Landbouwtijdschrift (1983), 3(mai-juin 1983), 621-633

3. Céréales - 3.3 Techniques actuelles de production en culture céréalière intensive - 3.3.2 Modalités de semis, fumure azotée, produits à action antiverse et protection phytosanitaire - 3.3.2.2 Orge d'hiver.

in Revue de l’Agriculture = Landbouwtijdschrift (1983), 36(3), 635-643

Chromosome Integration Domain for Bovine Leukemia Provirus in Tumors

in Journal of Virology (1983), 47(1), 146-150

A generalized algorithm for efficient photometric reductions

in Astronomy and Astrophysics (1983), 120

The authors present a generalized method applicable to the reduction of photometric observations in any well-defined system. The method is characterized by the use of practically every measurement of any ... [more ▼]

The authors present a generalized method applicable to the reduction of photometric observations in any well-defined system. The method is characterized by the use of practically every measurement of any non-variable star in the reduction procedure. Its main advantages are a greater accuracy and a substantial saving of observing time on extinction and standard stars. A particular case of application to the uvby system is detailed and discussed. [less ▲]

IUE and other new observations of the slow nova RR Tel

in Monthly Notices of the Royal Astronomical Society (1983), 202

IUE satellite UV spectra of RR Tel covering 1150-3200 A at high and low dispersion through both large and small apertures are reported, and a list of 431 lines is presented which gives measured wavelength ... [more ▼]

IUE satellite UV spectra of RR Tel covering 1150-3200 A at high and low dispersion through both large and small apertures are reported, and a list of 431 lines is presented which gives measured wavelength, intensity, and full width at half maximum. Over three-quarters of the lines are identified, and a correlation is noted between line width and ionization energy. The lines identified, which include common species ionized from one to four times, are generally resonance, forbidden or semiforbidden lines but also include the recombination lines for C, O and Ne. Many Fe II lines are present. Forbidden line wavelengths are used to define intersystem separations of energy levels in some species. The continuum energy distribution yielded by low dispersion data is not due to a simple recombination of gaseous emission processes and a hot star or accretion disk, but the very high ratio of the energy in the lines to that in the continuum of 2.4 indicates that a high temperature source must be present. [less ▲]

Infections intestinales et systemiques à Campylobacter

in Revue Médicale de Liège (1983), 38(6), 204-8

La cartographie assistée par ordinateur. (2 tomes) Actes de la journée du groupe FNRS de géographie théorique et quantitative

in Notes de Recherches de la Société Géographique de Liège (1983), 4

Dynamical study of non adiabatic unimolecular reactions: The conical intersection between the B 2B2 and à 2A1 states of H2O+.

in Journal of Chemical Physics (1983), 78(3), 1246-1264

The conical intersection conecting the B 2A' and A 2A' states of the H2O+ ion is studied. The two potential energy surfaces are calculated ab initio by the SCF/CI method within the Cs point group. The ... [more ▼]

The conical intersection conecting the B 2A' and A 2A' states of the H2O+ ion is studied. The two potential energy surfaces are calculated ab initio by the SCF/CI method within the Cs point group. The nonadiabatic elements <A|d/dq|B> are computed for several cross sections throughout the potential energy surfaces. A transformation to the diabatic representation is performed. The linear model is found to be a good approximation in the region close to the apex of the cone. The global functions t(s) and T(S) governing the nonadiabatic transition probability are calculated; their shapes are those predicted by the Landau-Zener model (in the Nikitin bidimensional version). A dynamical study is undertaken by means of classical trajectory calculations on the upper adiabatic potential energy surface. An average transition probability Ptr is derived. Excitation of rotation or of the bending mode of H2O before photon impact has no influence on Ptr. Excitation of the symmetrical or antisymmetrical valence mode of H2O lowers Ptr. The shape of ln(1-Ptr) as a function of time indicates the existence of two distinct regimes at short and intermediate time ranges, characterized by two different rate constants k1 and k2 respectively. The rate constants are of the order of 10exp(14) s-1. k1 exhibits a maximum as a function of the absorbed energy Eabs whereas k2 decreases as a function of Eabs. [less ▲]

News from Belgium

in LIVING BLUESLETTER (1983), 1(2),

Projets de rééditions de la compagnie MOONSHINE RECORDS ( B)

The complete amino acid sequence of the Zn2+-containing D-alanyl-D-alanine-cleaving carboxypeptidase of streptomyces albus G

in European Journal of Biochemistry (1983), 130(1), 53-69

The 22076-Mr Zn2+-containing D-alanyl-D-alanine-cleaving carboxypeptidase of Streptomyces abuls G effectively catalyses the transfer of the N alpha, N epsilon-diacetyl-L-lysyl-D-alanyl electrophilic group ... [more ▼]

The 22076-Mr Zn2+-containing D-alanyl-D-alanine-cleaving carboxypeptidase of Streptomyces abuls G effectively catalyses the transfer of the N alpha, N epsilon-diacetyl-L-lysyl-D-alanyl electrophilic group of the standard tripeptide substrate N alpha, N epsilon-diacetyl-L-lysyl-D-alanyl-D-alanine to water. It also performs a weak beta-lactamase activity, hydrolysing penicillin into penicilloate at a very low rate. This protein consists of 212 amino acid residues in a single polypeptide chain. The N terminus is partially blocked as a result of the cyclization of the dipeptide Asn-Gly into anhydroaspartylglycine imide. The protein has been fragmented by cyanogen bromide into five fragments whose sequences have been determined via appropriate subcleavages with various proteases. The ordering of the cyanogen bromide peptide fragments has been carried out (a) by submitting the S-carboxymethylated protein to complete tryptic digestion and labelling the methionine-containing peptides thus obtained with iodo[14C]-acetamide, and (b) by submitting to limited tryptic digestion the S-[2-(4'-pyridyl)ethyl]-cysteine protein whose amino groups have been blocked by reaction with exo-cis-3,6-endoxo-delta 4-tetrahydrophthalic anhydride prior to digestion. The protein contains six cysteine residues in the form of three disulfide bridges. No homology is found by comparing this peptidase with other Zn2+-containing enzymes (carboxypeptidase A, thermolysin, carbonic anhydrase B and alcohol dehydrogenase) and several completely or partially sequenced, serine-containing D-alanyl-D-alanine-cleaving peptidases and Zn2+/serine-containing beta-lactamases. [less ▲]

Etude dendrométrique du pin sylvestre

in Notes Techniques du Centre d'Ecologie Forestière et Rurale (1983), 44

Exurbanisation ou réintégration urbaine des industries et du tertiaire lourd? Comparaison et perspectives

in Bulletin de la Société Géographique de Liège (1983), (19), 53-61

The aim of this study is, initially, to compare the attempts at urban reintegration of certain industrial activities at the present time with the considerable ex-urbanisation movement of activities which ... [more ▼]

The aim of this study is, initially, to compare the attempts at urban reintegration of certain industrial activities at the present time with the considerable ex-urbanisation movement of activities which has been evident since 1960. We then go on to analyse the strenghts and weaknesses of the two trends and seek to define the likely future of the processes and put forward a new urban strategy for a more efficient policy as to receiving certain activities in urban surroundings. [less ▲]

Dual methods for optimizing finite element flexural systems

in Computer Methods in Applied Mechanics & Engineering (1983), 37(3), 249-275

Modern numerical methods for the optimization of large discretized systems are now well developed and highly efficient in the case of thin walled elastic structures modeled by finite elements. However ... [more ▼]

Modern numerical methods for the optimization of large discretized systems are now well developed and highly efficient in the case of thin walled elastic structures modeled by finite elements. However, this is not yet true for structures whose components are subject simultaneously to bending and extension loads. In this paper, the idea of Generalized Optimality Criterion (GOC), set forth in previous papers for bar, membrane, and pure bending elements, is extended to deal with general beam and flat shell elements. The modifications brought to the GOC result in explicit approximations for the behavior constraints that are correct up to the first order, but that exhibit a more complex algebraic form. Indeed these explicit expressions are no longer merely linear in the reciprocal design variables. However, they continue to be additively separable, and therefore dual methods remain fully applicable, just as in the original statement of the GOC approach. Numerical examples will be offered to demonstrate the efficiency of the method presented. [less ▲]

The behaviour of spacerless bundles due to high load current

in Electra (1983), 90

Overhead power lines with bundle conductors may be equipped without spacers. In such case overload may induce kissing phenomena or collapsing inside the bundle. This paper , following the first one ... [more ▼]

Overhead power lines with bundle conductors may be equipped without spacers. In such case overload may induce kissing phenomena or collapsing inside the bundle. This paper , following the first one published also in ELECTRA this year, is describing the final formulation of the kissing current level, validated by scale model and full scale test on unspacered twin bundle line in vertical arrangement. [less ▲]

Morphogenesis and fibronectin in sexual differentiation of rat embryonic gonads.

in Differentiation : Research in Biological Diversity (1983), 23(Suppl), 72-81

The possible role of fibronectin in the organization of the sex-specific gonadal components was studied by immunocytochemistry combined with electron and light microscopy in rat fetuses at the ages of 12 ... [more ▼]

The possible role of fibronectin in the organization of the sex-specific gonadal components was studied by immunocytochemistry combined with electron and light microscopy in rat fetuses at the ages of 12-15 days. Fibronectin was evenly distributed in both sexes under the basal lamina of the surface epithelium. Other basal laminae were not seen using light or electron microscopy inside the gonadal ridges at the age of 12 days. As the first sign of sexual differentiation, fibronectin-negative gonadal cords appeared in 13-day-old fetuses. In the males the cords were bigger than those in the females. The cords were clearly separated from the interstitium in 15-day-old fetuses of both sexes. A continuous layer of fibronectin had formed between the testicular surface epithelium and the elongated cords indicating the formation of a tunica albuginea. In females the surface epithelium-cord connection was maintained at all stages. Connections of the gonadal cords to mesonephric tubuli were seen in the rete region of both sexes. The electron optical basal lamina around the gonadal cords became continuous by the age of 15 days. The present results suggest that fibronectin is intimately involved in the sexual differentiation of the gonads, but not under the regulation of H-Y antigen or other testis-organizing factor. [less ▲]

Immunohistochemical localization of laminin, type IV and type V collagen in basal cell carcinoma.

in British Journal of Dermatology (1983), 108(2), 163-70

Laminin, type IV and type V collagen were localized in twenty-five basal cell carcinomas (BCCs) by immunofluorescence. All basal cell carcinomas were separated from the connective tissue by a continuous ... [more ▼]

Laminin, type IV and type V collagen were localized in twenty-five basal cell carcinomas (BCCs) by immunofluorescence. All basal cell carcinomas were separated from the connective tissue by a continuous basement membrane (BM) which always contained the three antigenic determinants. Nodular and cystic BCCs, but not pagetoid BCCs, contain linear and globular deposits of these BM components. The linear deposits probably represent BM debris that remains undigested and the globular deposits correspond to residual cytoplasmic fragments occurring during apoptosis. These results suggest that BM components are synthesized by epithelial cells and are secreted to polymerize at the dermo-epidermal junction. [less ▲]

Successful treatment of hemiballismus with progabide, a new GABA-mimetic agent.

in Journal of Neurology (1983), 229(2), 121-4

Etude longitudinale par ultrasonographie en temps réel des lésions de l'encéphale chez le nouveau né malade

in Louvain Medical (1983), 102

Changes in the renal and maternal utero-placental arteries in pregnancies complicated by hypertension

in Revue Médicale de Liège (1983), 38(12), 519-36

Anti-laminin antibodies in workers exposed to mercury vapour.

in Toxicology Letters (1983), 17(1-2), 113-6

In 62 male workers exposed to mercury vapour for 5.5 years on average, the results of several renal parameters were not significantly different from those found in a well-matched control group (n = 60 ... [more ▼]

In 62 male workers exposed to mercury vapour for 5.5 years on average, the results of several renal parameters were not significantly different from those found in a well-matched control group (n = 60). Circulating anti-laminin antibodies were found, however, in 8 workers exposed to mercury vapour but in none of the control workers. These results suggest that occupational exposure to mercury vapour may lead to immune dysfunction in a certain percentage of the exposed population. Whether such a finding is predictive of the occurrence of an immune glomerulonephritis remains to be evaluated. [less ▲]

A local potent glucocorticosteroid decreases the induction of galactosylhydroxylysyl glucosyltransferase in suction blisters but has no effect on basement membrane structures.

in British Journal of Dermatology (1983), 108(2), 171-8

The effects of local glucocorticosteroid treatment on collagen biosynthesis and basement membrane components were studied in suction blisters in human abdominal skin. Pretreatment with clobetasol-17 ... [more ▼]

The effects of local glucocorticosteroid treatment on collagen biosynthesis and basement membrane components were studied in suction blisters in human abdominal skin. Pretreatment with clobetasol-17-propionate, applied three times a day for 4 days, did not affect the activity of galactosylhydroxylysyl glucosyltransferase (GGT) in fresh blisters but post-blistering treatment for 3 days with the steroid markedly inhibited the increase of this enzyme activity during the initial phases of re-epithelialization. The GGT activity was over 50% lower in steroid-treated blisters compared with control values. Protein concentrations and blister fluid volumes were also significantly decreased in healing 3-day blisters after steroid treatment. These results suggest that local glucocorticosteroid decreases either the synthesis of GGT or its release from the tissue into the blister fluid. The treatment did not affect the blister histology nor the early process of re-epithelialization. Immunohistochemically, type IV and V collagens and laminin of the basement membrane zone were similarly located in blisters of steroid-treated and placebo-treated skin, suggesting that local glucocorticosteroid does not affect the integrity of the basement membrane. [less ▲]

Coal gasification at pressure by mixtures of carbone dioxide and oxygen

in Fuel (1983), 62

Les origines de la querelle fouronnaise

in Courrier Hebdomadaire du CRISP (1983), (n°1019), 33

Alterations of the basement membrane and connective tissue antigens in human metastatic lymph nodes.

in International Journal of Cancer = Journal International du Cancer (1983), 31(6), 719-26

Antigens of the basement membrane (type-IV collagen and laminin) and the connective tissue (type-III collagen and fibronectin) were studied by immunofluorescence in 16 lymph nodes draining colorectal ... [more ▼]

Antigens of the basement membrane (type-IV collagen and laminin) and the connective tissue (type-III collagen and fibronectin) were studied by immunofluorescence in 16 lymph nodes draining colorectal carcinomas and 6 lymph nodes draining breast carcinomas. A comparison was also made between 7 primary colorectal carcinomas and 9 lymph nodes draining these tumors. Anti-type-IV collagen and anti-laminin rarely stained the basement membrane of metastatic tumors. In contrast, we detected type-IV collagen in the peritumoral stroma, although similar images were rarely seen in primary tumors. When tumoral cells were in the vicinity of lymphoid cells, they were occasionally separated by a barrier stained by the four antisera, or only by antifibronectin and anti-type-III collagen. In other cases no barrier was observed between both types of cells which were in close contact. On the whole the above alterations were more marked in the lymph nodes draining breast carcinomas, in comparison to those draining colorectal carcinomas. Tumor cells were never stained by anti-type-IV collagen or antilaminin serum. Some cells found either in the lymphoid or in the tumor area of metastatic lymph nodes were stained not only by these antisera, but also by a monoclonal antibody against Willebrand Factor, which is a marker of endothelial cells. Thus the labelled cells were characterized as being derived from the capillary wall. [less ▲]

Précision des valeurs estimées à l'aide de tarifs de cubage d'arbres

in Annales des Sciences Forestieres (1983), 40(3), 299-308

La précision du volume estimé d'un ensemble d'arbres à partir d'une équation de cubage dépend essentiellement de la variation résiduelle, de la variation liée à l'équation de cubage, du nombre et de la ... [more ▼]

La précision du volume estimé d'un ensemble d'arbres à partir d'une équation de cubage dépend essentiellement de la variation résiduelle, de la variation liée à l'équation de cubage, du nombre et de la répartition en catégories de grosseurs des arbres à cuber. L'importance relative de ces différents facteurs a été étudiée, d'une part, en fonction des caractéristiques de l'échantillon utilisé pour la construction du tarif et, d'autre part, en fonction des caractéristiques de l'ensemble d'arbres dont on estime le volume. [less ▲]

Note sur l'élasticité parfaite des corps solides chimiquement définis : Analogies nouvelles entre les solides, les liquides et les gaz

in Bulletin de la Société Chimique de Paris (1983)

Le mécénat en Belgique francophone

in Art&fact (1983), 2

Didéhydro-16,17 isostrychnobiline, nouvel alcaloÏde bisindolinique asymétrique du Strychnos variabilis

in Journal de Pharmacie de Belgique (1983), 38(5), 241-245

We describe a new asymmetrical bisindole alkaloid, 16,17-didehydroisostrychnobiline, that was isolated by reverse phase liquid chromatography from the root barks of Strychnos variabilis. Its structure was ... [more ▼]

We describe a new asymmetrical bisindole alkaloid, 16,17-didehydroisostrychnobiline, that was isolated by reverse phase liquid chromatography from the root barks of Strychnos variabilis. Its structure was elucidated from spectral analysis and by acid hydrolysis. Its stereochemistry was established by 300 MHz 1H NMR spectroscopy [less ▲]

Localization by immunofluorescent microscopy of several collagen types and of a basement membrane proteoglycan in rat glomerular epithelial and mesangial cell cultures.

in Renal Physiology (1983), 6(4), 163-70

Confluent cultures of rat glomerular epithelial and mesangial cells were studied by immunofluorescent microscopy, using affinity-purified antibodies directed against collagen of type I-V or an antiserum ... [more ▼]

Confluent cultures of rat glomerular epithelial and mesangial cells were studied by immunofluorescent microscopy, using affinity-purified antibodies directed against collagen of type I-V or an antiserum directed against a basement membrane (BM) proteoglycan. The epithelial cells were stained by antibodies directed against type I, IV and V collagen, whereas the mesangial cells were stained by all the antibodies directed against the different collagenous antigens tested. Therefore, only mesangial cells contained antigenic determinants of type III collagen. On the contrary, both cell types possessed BM proteoglycan antigens. The data suggest that rat glomerular epithelial and mesangial cells may be implicated in the biosynthesis of different components of normal (and pathological) glomerular BM. [less ▲]

Outils pour l'analyse d'une nouvelle de Marguerite Yourcenar (première partie)

in Enjeux : Revue de Formation Continuée et de Didactique du Français (1983), 2

Etude comparée des parades sexuelles de quelques espèces de chéloniens: Pelomedusa s. subrufa (Lacépède), Sternotherus minor (Agassiz) et Kinixys belliana nogueyi (Bell)

in Cahiers d'Ethologie (1983), 3(1), 39-58

Next to a short analysis of the sexual interactions and the relative importance of the stimulation kinds performed with each behaviour pattern, we analyse the observed behavioural sequences in courtship ... [more ▼]

Next to a short analysis of the sexual interactions and the relative importance of the stimulation kinds performed with each behaviour pattern, we analyse the observed behavioural sequences in courtship and mating behaviour of three chelonian's species: Pelomedusa s. subrufa, Sternotherus minor and Kinixys belliana nogueyi. The study of the behavioural sequences emphasizes the great fluctiation between the exhibited behaviour patterns and specifies the means leading to the female's stabilization. The sexual behaviours (knowed from this study or the litterature) of P.s.subrufa, S. minor, K. belliana nogueyi, Geochelone carbonaria, Testudo g. graeca, Emys orbicularis, Chrysemys scripta elegans, Chemmys nigricans and Meosemys grandis were submitted to a discriminant analysis to establish certain phylogenetic relations by use of behavioural criteria. We emphasize here the difficulties of the interpretation of this lethod. However, we establish a relative ratification of the phylogeny founded on morphological characters. [less ▲]

La station de Calvi et l'expérience Medalpex en Méditerranée Occidentale

in Bulletin de la Société Royale des Sciences de Liège (1983), 52(1), 51-64

Colloidal gold, a useful marker for antigen localization on follicular dendritic cells.

in Journal of Immunological Methods (1983), 59(3), 361-8

Bovine serum albumin (BSA) bound to colloid gold particles (BSA-gold; 20 nm diameter) and injected into preimmunized mice was found at ultrastructural level in different locations of the lymph nodes. It ... [more ▼]

Bovine serum albumin (BSA) bound to colloid gold particles (BSA-gold; 20 nm diameter) and injected into preimmunized mice was found at ultrastructural level in different locations of the lymph nodes. It was detected particularly in the secondary lysosomes of macrophages and between the cytoplasmic processes of the follicular dendritic cells. Between these processes the gold particles were isolated or grouped in clusters; they were in close contact with cell membranes or embedded in dense material. Colloidal gold injected alone was not retained on these cells. The presence of anti-BSA antibodies in the serum was necessary for trapping of BSA-gold particles on follicular dendritic cells. Injections of BSA alone after BSA-gold had been administered to preimmunized mice eliminated most of the BSA-gold from the dendritic processes. BSA-gold is thus trapped in the form of immune complexes which behave characteristically. BSA-gold is thus a suitable marker for antigen localization. Being small and electron dense it permits more precise location than radioactive markers. [less ▲]

Etude du marquage de la beta-endorphine (beta-END) et de la beta-lipotropine (beta-LPH) par l'iode 125.

in Comptes Rendus des Séances de la Société de Biologie et de ses Filiales (1983), 177(2), 259-68

5 micrograms of human beta-endorphin were labelled with 2 mCi 125I by the chloramine T technique. After two gel filtrations on Sephadex G-15 and on Sephadex G-50 in phosphate buffer with EDTA, Trasylol ... [more ▼]

5 micrograms of human beta-endorphin were labelled with 2 mCi 125I by the chloramine T technique. After two gel filtrations on Sephadex G-15 and on Sephadex G-50 in phosphate buffer with EDTA, Trasylol and mercapto-ethanol, a pure tracer was obtained with a specific activity about 150 microCi/ug. Kept at + 4 degrees C, the tracer remained utilizable for 30 days without loss of immunoreactivity. The labelling with lactoperoxydase and the use of another gel filtration method (filtration on Aca 202) gave a 125I beta-END tracer with the same immunoreactivity. The binding of this tracer to the antibody of an anti-beta-END antiserum diluted at 1/8000 was 32% with a non specific binding of 2%. 5 micrograms of human beta-lipotropin were labelled with 0.5 mCi 125I by the lactoperoxydase method. After two gel filtrations on Sephadex G-25 and on Sephadex G-75 in phosphate buffer with EDTA, Trasylol and mercapto-ethanol, a pure tracer with a specific activity of 140 microCi/micrograms was obtained. It remained utilizable for 30 days when kept at + 4 degrees C. Gel filtration on Aca 202 did not give good purification, while gel filtration on Aca 54 was good but slower than on Sephadex G-75. The binding to antibody in absence of unlabelled beta-LPH was 32% for an anti-beta-LPH antiserum diluted at 1/4000. The non specific binding was 2.5%. [less ▲]

Etude de l'amortissement de la houle au travers des digues perméables

in Bulletin de l’Association Internationale Permanente des Congrès de Navigation [Bulletin de l'AIPCN] (1983), (1), 7

Un inventaire forestier au service de la région wallonne

in Wallonie 83 (1983), 1, 10ème année(55), 41-49

L'inventaire des ressources forestières de Wallonie représente un travail et un investissement très important. Il est réalisé sur des bases scientifiques rigoureuses et alimente une banque de données dont ... [more ▼]

L'inventaire des ressources forestières de Wallonie représente un travail et un investissement très important. Il est réalisé sur des bases scientifiques rigoureuses et alimente une banque de données dont l'exploitation, assurée par ordinateur, doit permettre aux gestionnaires forestiers, utilisateurs du bois, responsables de l'économie régionale et scientifiques, de trouver rapidement quantité d'informations utiles à leurs activités. L'inventaire proposé n'est utilisable qu'à l'échelle d'étendues suffisamment importantes de plusieurs centaines à plusieurs milliers d'hectares. [less ▲]

Tarif de cubage peuplement pour le hêtre (Fagus sylvatica L.) en Wallonie.

in Bulletin des Recherches Agronomiques de Gembloux (1983), 18(3), 165-172

A stand volume table has been constructed to give rapid low-cost estimates of volume per hectare for beech (Fagus sylvatica L.) located in the south of Belgium. The stand structure in this area is rather ... [more ▼]

A stand volume table has been constructed to give rapid low-cost estimates of volume per hectare for beech (Fagus sylvatica L.) located in the south of Belgium. The stand structure in this area is rather heterogeneous, with mixed even-aged and uneven-aged aspects. The use of the table requires the assessment of the basal area per hectare G (in m2) and the top height hdom (in m) of the crop. The volume V (in m3) up to 22 cm girth is given by the following equation : V = 2,0312 + 0,4104 G.hdom [less ▲]