Myofibrillar composition of some red- and white-blooded Antarctic teleosts

in Molecular Physiology (1984), 5

Le matérialisme biologique de Lévi-Strauss

in Revue Philosophique de la France et de l'Etranger (1984)

Contribution à l'étude pharmacognostique de la passiflore

in Journal de Pharmacie de Belgique (1984), 39(1), 15-22

Review of botanical, phytochemical and pharmacological data about Passiflora incarnata L. and two possible falsifications: Passiflora edulis SIMS and Passiflora caerulea L is presented.A reliable ... [more ▼]

Review of botanical, phytochemical and pharmacological data about Passiflora incarnata L. and two possible falsifications: Passiflora edulis SIMS and Passiflora caerulea L is presented.A reliable identification by TLC is also described. [less ▲]

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

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

Etude complémentaire de la cytotoxicite de la mélinonine F, alcaloide dérive de la beta-carboline

in Planta Medica (1983), 49(11), 158-161

The cellular effects of melinonine F, an alkaloid isolated from STRYCHNOS MELINONIANA (South America) and STRYCHNOS USAMBARENSIS (Central Africa), are analysed in cancer or normal cells in culture. A ... [more ▼]

The cellular effects of melinonine F, an alkaloid isolated from STRYCHNOS MELINONIANA (South America) and STRYCHNOS USAMBARENSIS (Central Africa), are analysed in cancer or normal cells in culture. A cytotoxic action is noted in both types of cells, at least for relatively high concentrations. These effects are probably due to interaction of the drug with chromatin. Physico-chemical analysis demonstrates partial intercalation of melinonine F on pure DNA IN VITRO. [less ▲]

Mieux "être": l'insecurité en question

in Revue d'action sociale (1983), N°6

Newly Synthesized mRNA Is Translated During the Initial Imbibition Phase of Germinating Maize Embryo

in Plant Physiology (1983), 73(2), 484-487

RNA synthesis is activated in the cells of the plant embryo very soon after the start of seed imbibition. We previously reported that mainly heterogeneous nuclear RNA is synthesized in the radicle of Zea ... [more ▼]

RNA synthesis is activated in the cells of the plant embryo very soon after the start of seed imbibition. We previously reported that mainly heterogeneous nuclear RNA is synthesized in the radicle of Zea mays embryo during the first hours of germination. The present study was undertaken in order to detect the time of appearance of the newly synthesized messenger RNA in the polysomes of germinating maize axes.Free polysomes were prepared from embryonic axes rehydrated for 2 hours in the presence of radioactively labeled uridine. These polysomes were shown to be labeled and to contain labeled particles sedimenting, after dissociation with EDTA, in the 10S to 40S region of a sucrose gradient. The labeled polysomal RNA migrates heterogeneously in a gel with a mean size corresponding to about 16S, and 60% of these molecules are polyadenylated.The data indicate that the newly synthesized RNA associated with the polysomes after 2 h of germination consists of messenger RNA molecules. Analysis of the polysomes prepared 0.5 and 1 h after the start of imbibition suggests that translation of the newly synthesized messenger RNA probably occurs within the 1st hour of imbibition of the isolated axis, thus well before the completion of the initial water uptake. [less ▲]

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 ▲]

Politique actuelle dans le traitement de la polyarthrite rhumatoïde

in Médecine et Hygiène (1983), 41

Traiter de la polyarthrite rhumatoïde, maladie caractérisée notamment par une immunité perturbée, vise à rendre fonctionnelle l'articulation malade par des méthodes tant locales que générales. Le schéma ... [more ▼]

Traiter de la polyarthrite rhumatoïde, maladie caractérisée notamment par une immunité perturbée, vise à rendre fonctionnelle l'articulation malade par des méthodes tant locales que générales. Le schéma thérapeutique est construit selon une pyramide dont les fondations sont capitales, comprenant le repos, la rééducation physique, le soutien psychologique du patient rhumatisant. Ces mesures sont à appliquer à tous, en association avec les anti-inflammatoires non stéroïdiens qui constituent la première ligne de défense contre cette affection. Plus on monte de niveaux dans cette pyramide et plus le traitement est à réserver à des situations cliniques de plus en plus sélectionnées. Les médicaments de deuxième niveau comprennent les sels d'or, les dérivés organothiols et le lévamisole, substances modulatrices de l'immunité, et modifiant ainsi le caractère évolutif de la maladie. Ils n'agissent qu'après plusieurs semaines. Il est donc nécessaire de les associer à la thérapeutique de premier niveau. Les médications immunosuppressives (y compris la corticothérapie) constituent le troisième niveau, à n'appliquer généralement que dans les formes sévères de polyarthrite rhumatoïde. Enfin, la thérapeutique de quatrième niveau n'est à utiliser que de façon tout à fait casuelle, vu son caractère agressif pour le patient et son rapport coût/bénéfice élevé. Elle comprend les manipulations des lymphocytes, les échanges plasmatiques, voire l'immunothérapie. Elle constitue un véritable outil de recherche car elle permet de mieux approcher les mécanismes dysimmunitaires caractérisant cette affection rhumatismale. [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 ▲]

Une épreuve pour l'entrée en première année

in Revue de la Direction Générale de l’Organisation des Etudes (1983)

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 ▲]

Does lactate dehydrogenase isoenzyme-5 contribute to the predictive power of total lactate dehydrogenase in myocardial infarction?

in Clinical Chemistry (1983), 29(5), 774-7

In 385 patients with acute myocardial infarction, lactate dehydrogenase (LD; EC 1.1.1.27) isoenzymes were determined electrophoretically 24, 48, and 72 h after admission. At those times, LD-1/LD-2 ratios ... [more ▼]

In 385 patients with acute myocardial infarction, lactate dehydrogenase (LD; EC 1.1.1.27) isoenzymes were determined electrophoretically 24, 48, and 72 h after admission. At those times, LD-1/LD-2 ratios exceeding 1 were recorded in 78.9, 88.8, and 92.2% of the cases, respectively. LD-1 ranged from 181 to 2674 U/L, or 21.9 to 66.1% of the total activity. On the first day of hospitalization, 27.3% of the patients demonstrated abnormal LD-5 (greater than 6% of total LD); this finding dropped to 20.5% and 17.4% in the two following days. Early increases in LD-5 were most frequently observed in patients associating inferior infarcts with posterior or lateral extension and having a previous history of myocardial infarction. On day 1, LD-5 was significantly increased in early deceased patients as compared to long-term survivors (9.7% vs 4.9% of total LD, p less than 0.01). LD-5 definitely contributes to the prognostic efficiency of total LD in acute myocardial infarction, but does not replace it as a risk predictor. This study confirms the superiority of total LD over the isoenzyme measurements to achieve short-term prognostication [less ▲]

25 Years ago - Yannick Bruynoghe

in Soul Bag (1983), (94), 27-28

Interview de Yannick Bruynoghe + photo

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. 3.3.2.6 Avoine de printemps.

in Revue de l’Agriculture = Landbouwtijdschrift (1983), 36(3), 657-659

3. Graanen - 3.3 Aktuele produktietechnieken in de intensieve graanteelt - 3.3.2. Zaaien, stikstofbemesting, anti-legeringsprodukten en gewasbescherming - 3.3.2.2 Wintergerst

in Revue de l’Agriculture = Landbouwtijdschrift (1983), 36(3), 621-629

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 ▲]

HD 85037 nouvelle variable à éclipses probable

in Information Bulletin on Variable Stars (1983), 2298

Not Available

Adiabatic-to-diabatic electronic state transformation and curvilinear nuclear coordinates for molecular systems

in Chemical Physics Letters (1983), 95(2), 139-143

Following an original idea of Baer, since then several times applied to various small molecular collisional systems, it is shown that — whatever the choice of curvilinear generalized coordinates to ... [more ▼]

Following an original idea of Baer, since then several times applied to various small molecular collisional systems, it is shown that — whatever the choice of curvilinear generalized coordinates to describe the molecular gometry and overall rotation — the algebraic framework proposed by Baer remains valid provided only that the exact tensorial expression of the kinetic energy operator is used. [less ▲]

A photometric study of southern Ap stars having right ascensions on the order of 12 h

in Astronomy and Astrophysics. Supplement Series (1983), 51

From uvby measurements periods have been deduced for the Ap stars 25 Sex, HR 4327, β Hya, HD 112381, HR 4965, HR 5158, HR 5269, and HD 125630. The star HR 4109 (Sr?) remained constant during an interval ... [more ▼]

From uvby measurements periods have been deduced for the Ap stars 25 Sex, HR 4327, β Hya, HD 112381, HR 4965, HR 5158, HR 5269, and HD 125630. The star HR 4109 (Sr?) remained constant during an interval of 23 d; the period is perhaps very long, or if HR 4109 actually does not vary, possibly it is not an Ap star. The observed variation for l Cen (Mn) was too weak to deduce a period. The variation range of HD 112381 (SiCr) is nearly as small as that of l Cen. The v and y variations for HD 125630 (SiCrSr), which are double-waved and nearly opposite to one another, have ranges among the largest known for Ap stars; the c[SUB]1[/SUB] range is also exceptionally large. For some Ap stars the variation curves show a dip of short duration in the four colours, and for a few stars a second one appears at a phase-interval of P/2. The nature of this phenomenon is discussed. [less ▲]

Acido-basic properties of lipophilic substances: A surface potential approach

in Journal of Colloid & Interface Science (1983), 91(2), 546-551

A general procedure allowing the acido-basic properties of lipophilic compounds to be defined is described. Drugs are spread at the air-water interface and the surface potential is recorded at different ... [more ▼]

A general procedure allowing the acido-basic properties of lipophilic compounds to be defined is described. Drugs are spread at the air-water interface and the surface potential is recorded at different pH values of the aqueous subphase. Comparison of this experimental parameter and the Gouy-Chapman theory prediction allows the calculation of the acid (or basic) dissociation constants and the surface charge density. [less ▲]

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 ▲]

prognostic value of combined data on enzymes and inflammation markers in plasma in cases of severe head injury

in Clinical Chemistry (1983), 29

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 ▲]

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

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

Choix de l'habitat chez le blaireau européen (Meles meles) en Belgique

in Cahiers d'Ethologie (1983), 3(1), 15-38

The Belgian population of the badger have suffered a severe decline during the two past decades. More thanone hundred burrows have been screened in order to define their characteristics. The data have ... [more ▼]

The Belgian population of the badger have suffered a severe decline during the two past decades. More thanone hundred burrows have been screened in order to define their characteristics. The data have been submitted to a multivariate analysis, allowing to isolate the main criteria guiding the habitat choice. The badger is supposed to be able to recolonize most of the sites from where it has disappeard il the persecutions it has to face were to come to an end. [less ▲]

Lhermitte-Duclos disease

in Acta Neuropathologica (1983), 59(2), 88-94

A new case of Lhermitte-Duclos disease (dysplastic gangliocytoma of the cerebellum) was recognized in an adult man after neurosurgery. Conventional, Golgi, and electron-microscopic investigations support ... [more ▼]

A new case of Lhermitte-Duclos disease (dysplastic gangliocytoma of the cerebellum) was recognized in an adult man after neurosurgery. Conventional, Golgi, and electron-microscopic investigations support the view that this rare lesion results from a progressive hypertrophy of granular cell neurons with excess of myelination of their axons in the molecular layer while inducing the local disappearance of Purkinje cells and the central core of the cerebellar folia. After a follow-up of 4 years, the patient now leads a normal life; no recurrence has occurred and no other neuropathologic alteration have been detected. [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 ▲]

La différenciation des souches de parvovirus chez les carnivores domestiques

in Annales de Médecine Vétérinaire (1983), 127

Le test de transformation lymphoblastique pour l'étude de l'immunocompétence du bétail

in Annales de Médecine Vétérinaire (1983), 127

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

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)

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

La fibronectine

in Presse Médicale (La) (1983), 12(4), 211-212

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 ▲]

Thallium, Nickel, Cobalt and other trace elements in iron sulfides from Belgian lead-zinc vein deposits

in Mineralium Deposita (1983), 10

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 ▲]

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 ▲]

Isolement et structure de trois bases anhydronium du Strychnos usambarensis du Rwanda

in Journal de Pharmacie de Belgique (1983), 38(3), 135-139

Three anhydronium bases have been isolated by DCC Chromatography. They were identified as melinonine F, dihydr-5,6 flavopereirine and the novel normelinonine F through their spectroscopic data and ... [more ▼]

Three anhydronium bases have been isolated by DCC Chromatography. They were identified as melinonine F, dihydr-5,6 flavopereirine and the novel normelinonine F through their spectroscopic data and comparison with authentic samples. [less ▲]

Light-induced quenching of photosystem II fluorescence at 77 K

in Photochemistry & Photobiology (1983), 38

Light-induced quenching of the low temperature fluorescence emission from photosystem II (PS II) at 695 nm (F695) has been observed in chloroplasts and whole leaves of spinach. Photosystem I (PS I ... [more ▼]

Light-induced quenching of the low temperature fluorescence emission from photosystem II (PS II) at 695 nm (F695) has been observed in chloroplasts and whole leaves of spinach. Photosystem I (PS I) fluorescence emission at 735 nm (F735) is quenched to a lesser degree but this quenching is thought to originate from PS II and is manifest in a reduced amount of excitation energy available for spillover to PS I. Differential quenching of these two fluorescence emissions leads to an increase in the F735/F685 ratio on exposure to light at 77 K. Rewarming the sample from -196°C discharges the thermoluminescence Z-band and much of the original unquenched fluorescence is recovered. The relationship between the thermoluminescence Z-band and the quenching of the low temperature fluorescence emission (F695) is discussed with respect to the formation of reduced pheophytin in the PS II reaction center at 77 K. [less ▲]

Le thème du double dans l'œuvre d'Emma Santos

in Écritures 82-83 (1983)

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 ▲]

Variabilité intra- et interannuelle des extrêmes journaliers de la température: proposition d'une méthode de travail.

in Hommes et Terres du Nord (1983), 1983-3

The UV spectrum of the Be star HD 50138.

in Be Star Newsletter (1983), 8

Not Available

Inclusions fluides dans les calcites associées à la minéralisation Pb Zn de Poppelsberg

in Mineralium Deposita (1983), 18

Groupe de Lubrification du Turboréacteur CFM56 2. Détermination des Caractéristiques Mécaniques de la Gorge de Cisaillement de l'Arbre de Rotation par la Méthode du Gradient de Contrainte

in Bulletin technique du Bureau Veritas (1983), (juillet-aout), 494-500

Pour la loutre en Wallonie: le compte à rebours a commencé

in Cahiers d'Ethologie (1983), 3(2), 267-271

In close connection with the otter conservation, the author rewiews what happened in Belgium since the publication of the report on threatened mammals in Wallony. Despite several deputies interventions in ... [more ▼]

In close connection with the otter conservation, the author rewiews what happened in Belgium since the publication of the report on threatened mammals in Wallony. Despite several deputies interventions in the Regional Council of Wallony, it appears that the legal status of the otter remained unchanged. Field research is still in progress and new occupied sites have been discovered. Unfortunately, hydraulic works are planned and some of them already realized in the river Ourthe, a tributary of the river Meuse, namely in a proportion still inhabited by a relictual otter population. [less ▲]

Les élections communales à Liège : bipolarisation et les écologistes au pouvoir

in Res Publica (1983), (n°2), 391-414