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See detailEvidence of a reentrant Peierls distortion in liquid GeTe
Raty, Jean-Yves ULg; Godlevsky, V.; Ghosez, Philippe ULg et al

in Physical Review Letters (2000), 85(9), 1950-1953

The local atomic order of semiconducting liquid GeTe is studied using first-principles molecular-dynamics simulations. Our work points out a high degree of alternating chemical order in the liquid and ... [more ▼]

The local atomic order of semiconducting liquid GeTe is studied using first-principles molecular-dynamics simulations. Our work points out a high degree of alternating chemical order in the liquid and demonstrates the presence of a Peierls distortion close above the melting temperature. This distortion, absent in the high temperature crystalline structure of NaCl type, is a remnant of the atomic arrangement in the A7 low temperature crystalline phase. It disappears slowly with temperature, as the liquid evolves from a semiconducting to a metallic state. [less ▲]

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See detailHepatitis C virus transmission following invasive medical procedures
Delwaide, Jean ULg; Gerard, Christiane ULg; Vaira, Dolorès ULg et al

in Journal of Internal Medicine (1999), 245(1), 107-108

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See detailSequentially compressive and intrusive mechanisms in mercury porosimetry of carbon blacks
Pirard, René ULg; Sahouli, Bendida; Blacher, Silvia ULg et al

in Journal of Colloid & Interface Science (1999), 217(1), 216-217

The mechanism of mercury penetration in two different commercial carbon blacks is studied. We show that the volume variation measured by mercury porosimetry in these systems is due to three successive ... [more ▼]

The mechanism of mercury penetration in two different commercial carbon blacks is studied. We show that the volume variation measured by mercury porosimetry in these systems is due to three successive mechanisms, which occur as the pressure increases: (1) mercury invasion of voids between macroscopic grains, (2) compaction and elastic compression of macroscopic grains, (3) intrusion in the voids of aggregates formed by primary particles. The cumulative surface calculated by the Rootare-Prenzlow equation (S-RP) in the intrusion part and the BET surface area measured by nitrogen adsorption (S-BET) are compared. (C) 1999 Academic Press. [less ▲]

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See detailHigh-Resolution Optical and Near-Infrared Imaging of the Quadruple Quasar RX J0911.4+0551
Burud, I.; Courbin, F.; Lidman, C. et al

in Astrophysical Journal (1998), 501

We report the detection of four images in the recently discovered lensed QSO RX J0911.4+0551. With a maximum angular separation of 3."1, it is the quadruply imaged QSO with the widest known angular ... [more ▼]

We report the detection of four images in the recently discovered lensed QSO RX J0911.4+0551. With a maximum angular separation of 3."1, it is the quadruply imaged QSO with the widest known angular separation. Raw and deconvolved data reveal an elongated lens galaxy. The observed reddening in at least two of the four QSO images suggests differential extinction by this lensing galaxy. We show that both an ellipticity of the galaxy ( epsilon _{{min}}=0.075 ) and an external shear ( gamma _{{min}}=0.15 ) from a nearby mass have to be included in the lensing potential in order to reproduce the complex geometry observed in RX J0911.4+0551. A possible galaxy cluster is detected about 38" from RX J0911.4+0551 and could contribute to the X-ray emission observed by ROSAT in this field. The color of these galaxies indicates a plausible redshift in the range of 0.6-0.8. [less ▲]

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See detailImage Deconvolution of the Radio Ring PKS 1830-211
Courbin, F.; Lidman, C.; Frye, B. L. et al

in Astrophysical Journal (1998), 499

New high-quality Keck and ESO images of PKS 1830-211 are presented. By applying a powerful new deconvolution algorithm to these optical and infrared data, both images of the flat spectrum core of the ... [more ▼]

New high-quality Keck and ESO images of PKS 1830-211 are presented. By applying a powerful new deconvolution algorithm to these optical and infrared data, both images of the flat spectrum core of the radio source have been identified. An extended source is also detected in the optical images which is consistent with the expected location of the lensing galaxy. The source counterparts are very red at I-K~7 , which suggests strong Galactic absorption with additional absorption by the lensing galaxy at z=0.885 and is consistent with the detection of high-redshift molecules in the lens. [less ▲]

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See detailClassical support for non-dispersive two electron wave packets in the driven helium atom
Schlagheck, Peter ULg; Buchleitner, A.

in Journal of Physics : B Atomic Molecular & Optical Physics (1998), 31(11), 489-495

We present numerical evidence for the existence of a classically non-ionizing, highly correlated two-electron configuration which emerges from the frozen planet configuration of helium exposed to an ... [more ▼]

We present numerical evidence for the existence of a classically non-ionizing, highly correlated two-electron configuration which emerges from the frozen planet configuration of helium exposed to an electromagnetic field of linear polarization. A static electric field parallel to the polarization axis prevents this configuration from transverse ionization. We argue that the corresponding nonlinear resonance island in 12D phase space supports nondispersive wave packets of the helium atom in combined oscillating and static electric fields. [less ▲]

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See detailDifferentiation between begnin and malignant breast lesions with MR imaging and scintimammography
Servais, Fabienne; Blocklet, Didier; Seret, Alain ULg et al

in Radiology (1997), 205(1), 283

No abstract for this letter.

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See detailThe geometry of the quadruply imaged quasar PG 1115+080: implications for H_0_.
Courbin, F.; Magain, Pierre ULg; Keeton, C. R. et al

in Astronomy and Astrophysics (1997), 324

Time delay measurements have recently been reported for the lensed quasar PG 1115+080. These measurements can be used to derive H_0_, but only if we can constrain the lensing potential. We have applied a ... [more ▼]

Time delay measurements have recently been reported for the lensed quasar PG 1115+080. These measurements can be used to derive H_0_, but only if we can constrain the lensing potential. We have applied a recently developed deconvolution technique to analyze sub-arcsecond I band images of PG 1115+080, obtained at the Nordic Optical Telescope (NOT) and the Canada France Hawaii Telescope (CFHT). The high performance of the deconvolution code allows us to derive precise positions and magnitudes for the four lensed images of the quasar, as well as for the lensing galaxy. The new measurement of the galaxy position improves its precision by a factor of 3 and thus strengthens the constraints on the lensing potential. With the new data, a range of models incorporating some of the plausible systematic uncertainties yields H_0_=53^+10^_-7_km/s/Mpc. [less ▲]

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See detailProgesterone receptors (PR) in ectopic endometrium?
NISOLLE, Michelle ULg; Donnez, Jacques

in Fertility and Sterility (1997), 68(5), 943-4

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See detailJ03.13 A and B: a new multiply imaged QSO candidate.
Claeskens, Jean-François ULg; Surdej, Jean ULg; Remy, M.

in Astronomy and Astrophysics (1996), 305

Careful analysis of direct R CCD frames obtained for selected Highly Luminous Quasars in March 1993 with the MPI/ESO 2.2m telescope has revealed that the quasar J03.13 consists of at least two point-like ... [more ▼]

Careful analysis of direct R CCD frames obtained for selected Highly Luminous Quasars in March 1993 with the MPI/ESO 2.2m telescope has revealed that the quasar J03.13 consists of at least two point-like components, constituting therefore a new gravitational lens candidate. Follow-up direct imagery of this interesting object with the New Technology Telescope (NTT) + SUSI in February 1994, using the Bessel B, R and Gunn-i filters, tends to confirm the gravitational lens hypothesis. The mean angular separation and magnitude difference between the A & B images are found to be 0.84"+/-0.03" and 2.1+/-0.1mag, respectively. A spatially unresolved, medium resolution spectrum of J03.13, obtained with the NTT + EMMI in February 1994, shows that the QSO has a redshift z=2.55, with Lyalpha and CIV absorptions at z=2.34 and MgII, MgI and FeII absorptions at z=1.085. The latter absorptions might be associated with a sigma=206km/s lens galaxy. B, R and Gunn-i photometric observations of J03.13 during 1994 and 1995 do not show evidence for flux variations exceeding 0.03mag. HST direct imagery with WFPC2 and FOS spectroscopy of J03.13 A & B are planned during cycle 5. [less ▲]

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See detailScreening for in vitro Antifungal Activities of some Indole Alkaloids
Quetin-Leclercq, J.; Favel, A.; Balansard, G. et al

in Planta Medica (1995), 61

Thirty indole alkaloids were tested by the agar dilution technique on a panel of human pathogenic fungi, yeasts and dermatophytes. Our results indicate that the most active compounds possess a beta ... [more ▼]

Thirty indole alkaloids were tested by the agar dilution technique on a panel of human pathogenic fungi, yeasts and dermatophytes. Our results indicate that the most active compounds possess a beta-carboline skeleton and that the presence of a 3,4 double bond enhances the activity. Our results also show that antifungal activities are not linked to the cytotoxic, antimicrobial or antiparsitic properties. [less ▲]

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See detailHalofantrine resistance in African countries
Carme, Bernard; Gay, Frédéric; Hayette, Marie-Pierre ULg et al

in Lancet (1993), 341

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See detailBarium isotopes in the very metal-poor star HD 140283
Magain, Pierre ULg; Zhao, G.

in Astronomy and Astrophysics (1993), 268

The fractions of odd and even isotopes of barium in the metal-poor star HD140283 are determined from an analysis of the profile of the Ba II resonance line, taking advantage of the differences in ... [more ▼]

The fractions of odd and even isotopes of barium in the metal-poor star HD140283 are determined from an analysis of the profile of the Ba II resonance line, taking advantage of the differences in hyperfine structure splitting between the different isotopes. Although one would expect an increased contribution of the r-process in very metal-poor stars, it is found that the isotopic ratio is very close to solar. [less ▲]

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See detailCytotoxic Activity of Some Triterpenoid Saponins
Quetin-Leclercq, J.; Elias, R.; Balansard, G. et al

in Planta Medica (1992), 58

The present note deals with the cytotoxic activity of purified saponins of hedera helix and of saponins isolated from other plants ( Calendula officinalis, C. arvensis and Sapindus mukurossi with a view ... [more ▼]

The present note deals with the cytotoxic activity of purified saponins of hedera helix and of saponins isolated from other plants ( Calendula officinalis, C. arvensis and Sapindus mukurossi with a view to the detection of possible structure-activity relationships. The most active compounds are the monodesmosides which show some degree of cytotoxicity at concentrations of 10 micrograms/ml and above. Among them, alpha- and beta-hederin are the most potent substances. [less ▲]

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See detail"Arterialization", "revascularization" , "rearterialization" - what's in a name?
D'Silva, Milbhor; Pirenne, Jacques; Bonnet, Pierre ULg et al

in Transplant International (1992), (5), 121-122

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See detailAntiparasitic Properties of Diploceline, a Quaternary Alkaloid from Strychnos gossweileri
Gasquet, Monique; Quetin-Leclercq, Joëlle; Timon-David, Pierre et al

in Planta Medica (1992), 58

The activity of diploceline is relatively weak as compared to metronidazole on Entamoeba histolytica and Trichomonas vaginalis. The quaternary alkaloid does not produce any inhibition of Plasmodium ... [more ▼]

The activity of diploceline is relatively weak as compared to metronidazole on Entamoeba histolytica and Trichomonas vaginalis. The quaternary alkaloid does not produce any inhibition of Plasmodium falciparum growth at 25 micrograms/ml (maximum tested concentration). [less ▲]

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See detailMourir,ultime tendresse (CR)
Stassart, Martine ULg

in Psychologica Belgica (1991), 3(1), 120-121

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See detailNew evidence against the existence of very massive stars
Heydari-Malayeri, M.; Remy, M.; Magain, Pierre ULg

in Astronomy and Astrophysics (1988), 201

The most luminous stars are our first probes for exploring the stellar content of distant galaxies. They have also been used as standard candles for extragalactic distance determinations. The authors show ... [more ▼]

The most luminous stars are our first probes for exploring the stellar content of distant galaxies. They have also been used as standard candles for extragalactic distance determinations. The authors show that Sk -66°41, one of the brightest stars in the Large Magellanic Cloud (LMC), is a multiple system consisting of at least six components. This result has important consequences for the understanding of star formation mechanisms, especially the upper limit to stellar masses. Moreover, when primary distance indicators are not available, care should be taken in using the brightest blue stars. The derived distances, depending on the number of cluster members, can easily be underestimated by more than a factor 2, leading to larger values for the Hubble constant. [less ▲]

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See detailDiscovery of a quadruply lensed quasar - The 'clover leaf' H1413 + 117
Magain, Pierre ULg; Surdej, Jean ULg; Swings, J.-P. et al

in Nature (1988), 334

The authors report the discovery of a second gravitational lens system in the broad absorption line quasar H1413+117. Four images of comparable brightness are seen, separated by â ¡1 arcsec. The unique ... [more ▼]

The authors report the discovery of a second gravitational lens system in the broad absorption line quasar H1413+117. Four images of comparable brightness are seen, separated by â ¡1 arcsec. The unique configuration of the images, together with the fairly rare occurrence of this type of quasar, makes it incontrovertible that this is a lensed system, not a cluster of quasars. (See also 159.062). [less ▲]

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See detailANOMALOUS ELECTRON HEAT-TRANSPORT DRIVEN BY LOW-FREQUENCY ELECTROMAGNETIC TURBULENCE - REPLY
Thoul, Anne ULg; Similon, P.L.; Sudan, R.N.

in Physical Review Letters (1988), 60(10), 967-967

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See detailInterstellar calcium towards supernova 1987A in the Large Magellanic Cloud
Magain, Pierre ULg

in Nature (1987), 329

High-resolution and high SNR spectra of interstellar calcium towards SN1987A in the LMC are presented. They provide completely new results for the Ca I spectrum, in which 11 components are detected, not ... [more ▼]

High-resolution and high SNR spectra of interstellar calcium towards SN1987A in the LMC are presented. They provide completely new results for the Ca I spectrum, in which 11 components are detected, not only at velocities corresponding to the Galaxy and the LMC, but also at intermediate velocities. The spectra, which allow the ionization balance in these interstellar clouds to be estimated, provide some clues about their physical state and location. In particular, the components between 150 and 200 km/s show a much lower ionization degree than other components. This may be due to recent compressions of the gas by a shock, possibly associated with a former supernova explosion. This interpretation would require the corresponding clouds to be located inside the LMC, indicating that at least some intermediate velocity components are not of halo origin. [less ▲]

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See detailDetection of interstellar CH and CH(+) towards SN 1987a
Magain, Pierre ULg; Gillet, D.

in Astronomy and Astrophysics (1987), 184

The authors report the detection of interstellar CH and CH[SUP]+[/SUP] towards supernova 1987A. For both of these molecules, one component is detected at a heliocentric velocity of about 280 km/s ... [more ▼]

The authors report the detection of interstellar CH and CH[SUP]+[/SUP] towards supernova 1987A. For both of these molecules, one component is detected at a heliocentric velocity of about 280 km/s, corresponding to material inside the LMC. Some implications of the authors' results with regards to the H[SUB]2[/SUB]-to-dust ratio are briefly discussed. [less ▲]

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See detailHD 151932 variability revisited
Vreux, Jean-Marie ULg; Manfroid, Jean ULg; Scuflaire, Richard ULg et al

in Astronomy and Astrophysics (1987), 180

The observation of variations in the blue absorption component of the He I lines as well as in the Si IV 4089 emission line of HD 151932 is reported. Possible explanations for these variations are ... [more ▼]

The observation of variations in the blue absorption component of the He I lines as well as in the Si IV 4089 emission line of HD 151932 is reported. Possible explanations for these variations are addressed, and it is concluded that none is satisfactory. The possibility of a periodicity in the variations is briefly considered. [less ▲]

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See detailDefective in vitro gamma-interferon production in rheumatoid arthritis
Malaise, Michel ULg; Franchimont, P.

in Arthritis and Rheumatism (1987), 30(2), 230-231

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See detailC3b receptor (CR1) on erythrocytes and the HLA-DR3 antigen
Malaise, Michel ULg; Desoroux, Aline ULg; Mahieu, P. et al

in Arthritis and Rheumatism (1986), 29(2), 300-301

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See detailComplement activation during hemodialysis
Malaise, Michel ULg; Lust, Catherine ULg; Foidart, J. B. et al

in New England Journal of Medicine [=NEJM] (1985), 312(8), 514-515

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See detailSodium-Lithium countertransport in red cells
Krzesinski, Jean-Marie ULg; Rorive, Georges ULg

in New England Journal of Medicine [=NEJM] (1983), 309(16), 987-988

To the Editor : Woods et al. provide evidence for a decrease in the rate of sodium-lithium countertransport in red cells after hemodialysis, and suggest that this effect is related to the removal of a ... [more ▼]

To the Editor : Woods et al. provide evidence for a decrease in the rate of sodium-lithium countertransport in red cells after hemodialysis, and suggest that this effect is related to the removal of a plasma factor. They did not observe a difference in ouabain-dependent sodium efflux during hemodialysis, but this conclusion is based on data in only two patients. This latter observation disagrees with previous date, which demonstrated a decrease in the sodium-potassium pump activity in patients with chronic renal failure. We have studied the sodium exchange in red cells of 11 patients receiving hemodialysis. These date suggest that the modifications in the rate of ouabain-sensitive sodium efflux observed after hemodialysis may be related to a volume-dependent plasma factor and not only to a decrease in th concentration of a dialyzable factor; this factor may be similar to the "natriuretic digoxin-like factor" postulated by de Wardener and MacGregor as playing a part in primary hypertension. It is also possible that the effect observed by Woods et al. on sodium-lithium countertransport is linked to improvement of the sodium-pump activity. [less ▲]

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See detailThe Al/Mg abundance ratio in halo stars
Arpigny, Claude ULg; Magain, Pierre ULg

in Astronomy and Astrophysics (1983), 127

The Al to Mg abundance ratio is redetermined in two extreme metal-poor stars, HD 19445 and HD 140283, on the basis of accurate spectral material. It is found that: (1) one of the two lines used for the Al ... [more ▼]

The Al to Mg abundance ratio is redetermined in two extreme metal-poor stars, HD 19445 and HD 140283, on the basis of accurate spectral material. It is found that: (1) one of the two lines used for the Al abundance determination is blended by CH lines; (2) no anomalous difference appears between the hotter and the cooler star, both showing an Al overdeficiency; (3) the observations are in fair agreement with predictions from the theory of explosive carbon burning. [less ▲]

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See detailCrystallographic data for a penicillin receptor : exocellular DD-carboxypeptidase-transpeptidase from Streptomyces R61
Knox, James R.; DeLucia, Mary L.; Murthy, N. S. et al

in Journal of Molecular Biology (1979), 127(2), 217-218

A pencillin-sensitive enzyme, the exocellular DD-carboxypeptidase-transpeptidase from Streptomyces R61, has been crystallized from polyethylene glycol (Mr = 6000 to 7500) solution at pH 7•6. X-ray ... [more ▼]

A pencillin-sensitive enzyme, the exocellular DD-carboxypeptidase-transpeptidase from Streptomyces R61, has been crystallized from polyethylene glycol (Mr = 6000 to 7500) solution at pH 7•6. X-ray examination of the orthorhombic crystals shows the space group is P212121, with unit cell dimensions a = 51•1 Å, B = 67•4 Å, and C = 102•9 Å. With four molecules of molecular weight 38,000, the Å3/dalton ratio for the cell is 2•33. The crystals are stable to irradiation for 75 hours and are suitable for structure analysis to at least 2•4 Å resolution. The radius of gyration of the molecule in solution at pH 6.8 is 20.8 Å. [less ▲]

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See detailForbidden FeIII-lines in celestial spectra
Edlén, B.; Swings, Polydore ULg

in Observatory (The) (1939), 62

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See detailA propos du Vita Genovefea : quelques mots de réponse à M. Bruno Krusch
Kurth, Godefroid ULg

in Revue d'Histoire Ecclésiastique (1920), XV, 3

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See detailA la rescousse des Six Cent : lettre à M. Henri Pirenne
Kurth, Godefroid ULg

in Bulletin de la Classe des Lettres et des Sciences Morales et Politiques (1913)

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See detailUn règlement de comptes
Kurth, Godefroid ULg

in Archives Belges (Belgisch Archief) (1900)

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See detailRéponse à M. A. Wauters : quelques mots sur les progrès de la toponymie en Belgique
Kurth, Godefroid ULg

in Bulletin de la Classe des Lettres et des Sciences Morales et Politiques (1896), XXXI(3e série), 313

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