References of "1998"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailPositive parity pentaquarks in a Goldstone boson exchange model
Stancu, Floarea ULg

in Physical Review. D : Particles and Fields (1998), D58

We study the stability of the pentaquarks $uudd\overline{Q}$, $uuds\overline{Q}$ and $udss\overline{Q}$ ($Q = c$ or $b$) of positive parity in a constituent quark model based on Goldstone boson exchange ... [more ▼]

We study the stability of the pentaquarks $uudd\overline{Q}$, $uuds\overline{Q}$ and $udss\overline{Q}$ ($Q = c$ or $b$) of positive parity in a constituent quark model based on Goldstone boson exchange interaction between quarks. The pentaquark parity is the antiquark parity times that of a quark excited to a p-shell. We show that the Goldstone boson exchange interaction favors these pentaquarks much more than the negative parity ones of the same flavour content but all quarks in the ground state. We find that the nonstrange pentaquarks are stable against strong decays. [less ▲]

Detailed reference viewed: 9 (4 ULg)
See detailLes nouveaux marqueurs de l'infarctus du myocarde
Chapelle, Jean-Paul ULg

Conference (1998, October 10)

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailX-ray analysis of the NMC-A beta-lactamase at 1.64-A resolution, a class A carbapenemase with broad substrate specificity
Swaren, Peter; Maveyraud, Laurent; Raquet, Xavier et al

in Journal of Biological Chemistry (1998), 273(41), 26714-26721

Detailed reference viewed: 14 (0 ULg)
See detailAcromegalie : Onderzoeken
Beckers, Albert ULg; Stevenaert, Achille ULg

in Medical News (1998), 51

Detailed reference viewed: 8 (0 ULg)
See detailAcromégalie : Examens complémentaires
Beckers, Albert ULg; Stevenaert, Achille ULg

in Medical News (1998), 51

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detail4-Methoxypyridine N-Oxide: a new regulator for the controlled free radical polymerization of methyl methacrylate
Detrembleur, Christophe ULg; Lecomte, Philippe ULg; Caille, Jean-Raphaël et al

in Macromolecules (1998), 31(20), 7115-7117

Detailed reference viewed: 42 (11 ULg)
See detailAcromégalie : Diagnostic différentiel
Beckers, Albert ULg; Stevenaert, Achille ULg

in Medical News (1998), 50

Detailed reference viewed: 11 (0 ULg)
See detailAcromegalie : Differentiaal-diagnose
Beckers, Albert ULg; Stevenaert, Achille ULg

in Medical News (1998), 50

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detailElectrochemical synthesis of polypyrrole nanowires
Jérôme, Christine ULg; Jérôme, Robert ULg

in Angewandte Chemie (International ed. in English) (1998), 37(18), 2488-2490

Through a hole in a poly(ethyl acrylate) (PEA) layer that is electrochemically grafted to the surface of a vitreous carbon electrode-that is the route that must be taken by a growing polypyrrole nanowire ... [more ▼]

Through a hole in a poly(ethyl acrylate) (PEA) layer that is electrochemically grafted to the surface of a vitreous carbon electrode-that is the route that must be taken by a growing polypyrrole nanowire in the electropolymerization of pyrrole. Chain growth is controlled by diffusion of the monomer through the DMF-swollen PEA layer, which acts as a template for the formation of nanowires (shown in the picture) with diameters of 400-1000 nm and lengths of up to 300 m. [less ▲]

Detailed reference viewed: 26 (1 ULg)
Peer Reviewed
See detailMolecular Cloning of a Mutated Hoxb7 Cdna Encoding a Truncated Transactivating Homeodomain-Containing Protein
Chariot, Alain ULg; Senterre-Lesenfants, Sylviane; Sobel, Mark E et al

in Journal of Cellular Biochemistry (1998), 71(1), 46-54

Homeodomain-containing proteins regulate, as transcription factors, the coordinated expression of genes involved in development, differentiation, and malignant transformation. We report here the molecular ... [more ▼]

Homeodomain-containing proteins regulate, as transcription factors, the coordinated expression of genes involved in development, differentiation, and malignant transformation. We report here the molecular cloning of a mutated HOXB7 transcript encoding a truncated homeodomain-containing protein in MCF7 cells. This is a new example of mutation affecting the coding region of a HOX gene. In addition, we detected two HOXB7 transcripts in several breast cell lines and demonstrated that both normal and mutated alleles were expressed at the RNA level in MCF7 cells as well as in a variety of breast tissues and lymphocytes, suggesting that a truncated HOXB7 protein might be expressed in vivo. Using transient co-transfection experiments, we demonstrated that both HOXB7 proteins can activate transcription from a consensus HOX binding sequence in breast cancer cells. Our results provide evidence that HOXB7 protein has transcription factor activity in vivo and that the two last amino acids do not contribute to this property. [less ▲]

Detailed reference viewed: 18 (5 ULg)
Full Text
Peer Reviewed
See detailCyclical Spectral and Photometric Variations of the Apparently Single Wolf-Rayet Star WR 134
Morel, Thierry ULg; Marchenko, S. V.; Eenens, P. R. J. et al

in Astrophysics & Space Science (1998), 260

Evidence is presented for the existence of a 2.3 day periodicity in the line-profile changes of the apparently singleWolf-Rayet star WR 134. This cyclical variability may be induced either by the presence ... [more ▼]

Evidence is presented for the existence of a 2.3 day periodicity in the line-profile changes of the apparently singleWolf-Rayet star WR 134. This cyclical variability may be induced either by the presence of an orbiting collapsed companion, or by the rotational modulation of a largely inhomogeneous outflow. [less ▲]

Detailed reference viewed: 6 (4 ULg)
See detailQuasar polarization (Hutsemekers+ 1998)
Hutsemekers, Damien ULg; Lamy, H.; Remy, Marc

Textual, factual or bibliographical database (1998)

Table 2 contains optical (V) polarimetric measurements for 42 optically selected QSOs including 29 broad absorption line QSOs. Table 3 contains a series of spectral indices characterizing the broad ... [more ▼]

Table 2 contains optical (V) polarimetric measurements for 42 optically selected QSOs including 29 broad absorption line QSOs. Table 3 contains a series of spectral indices characterizing the broad absorption line QSOs. (2 data files). [less ▲]

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailThe burden of illness of hypopituitary adults with growth hormone deficiency.
Hakkaart-van Roijen, L.; Beckers, Albert ULg; Stevenaert, Achille ULg et al

in PharmacoEconomics (1998), 14(4), 395-403

Objective: The negative metabolic and psychosocial consequences of growth hormone deficiency (GHD) in adults are now well established. In the present study, an attempt was made to quantify the burden of ... [more ▼]

Objective: The negative metabolic and psychosocial consequences of growth hormone deficiency (GHD) in adults are now well established. In the present study, an attempt was made to quantify the burden of illness, in terms of lost productivity and increased medical consumption, associated with hypopituitarism and untreated GHD. Design and Setting: The study population consisted of 129 Belgian adults with untreated GHD associated with hypopituitarism after pituitary surgery. The Short-Form 36 Health Survey (SF-36) was used to assess health status, and the Health and Labour Questionnaire was used to measure production losses and labour performance. Data on medical consumption were also collected. Main Outcome Measures and Results: Hypopituitary patients reported a lower health status than that of the general population in all but two dimensions of the SF-36 (pain and physical functioning). Nearly 11% of the patients reported being incapacitated for paid employment due to health problems, compared with 4.8% of the general Belgian population. Patients in paid employment reported a mean of 19.8 days of sickness leave per year, which is twice that in the general population. The annual number of visits to general practitioners and specialists was also higher in the patients (9.6 and 6.5 visits, respectively, for the patients compared with corresponding figures of 2.1 and 1.5 for the general Belgian population). The average annual number of days spent in hospital was 3.5 for the patients compared with 2.3 in the general population. The annual healthcare costs and costs due to production losses calculated for hypopituitary patients who had received pituitary surgery amounted to 135 024 Belgian francs (BeF) or $US4340 (1995 values). This compares with the mean annual cost per person for the Belgian population as a whole of BeF68 569 or $US2204. Conclusions: Hypopituitary patients with untreated GHD therefore have a higher cost to society in terms of lost production and medical consumption than the average Belgian population. [less ▲]

Detailed reference viewed: 18 (0 ULg)
Peer Reviewed
See detailLa troponine, nouveau marqueur de l'infarctus du myocarde
Chapelle, Jean-Paul ULg

in Revue Médicale de Liège (1998), 53(10), 619-24

The troponin (Tn) complex consists of three protein subunits referred to as TnT, TnI and TnC. Myocardium contains TnI and TnT isoforms which are not present in skeletal muscles and which can be separated ... [more ▼]

The troponin (Tn) complex consists of three protein subunits referred to as TnT, TnI and TnC. Myocardium contains TnI and TnT isoforms which are not present in skeletal muscles and which can be separated from the muscular isoforms by immunological techniques. Using commercially available immunoassays, clinical laboratories are able to determine cardiac TnT and TnI (cTnT and cTnI) as quickly and reliably as classical cardiac markers. After acute myocardial infarction, cTnT and cTnI concentrations start to increase in serum in a rather similar way than CK-MB, but return to normal after longer periods of time (approximately one week). Because of their excellent cardiac specificity, Tn subunits appear ideally suited for the differential diagnosis of myocardial and muscular damage, for example in non cardiac surgery patients, in patients with muscular trauma or with chronic muscular diseases, or after intensive physical exercise. cTnT and cTnI may also be used for detecting evidence of minor myocardial damage, and therefore may find new applications in the management of patients with unstable angina. [less ▲]

Detailed reference viewed: 66 (2 ULg)
Peer Reviewed
See detailFoam-like evolution in polycrystalline systems following successive 'melt and growth' cycles
Vandewalle, Nicolas ULg; Delisse, B.; Ausloos, Marcel ULg et al

in Philosophical Magazine B-Physics of condensed matter statistical mechanics electronic optical and magnetic properties (1998), 78(4), 397-408

A stochastic model of multigrain growth which allows for successive melting-growth cycles is investigated on a square lattice. Two fundamental constraints are introduced: (i) the melted mass amplitude and ... [more ▼]

A stochastic model of multigrain growth which allows for successive melting-growth cycles is investigated on a square lattice. Two fundamental constraints are introduced: (i) the melted mass amplitude and (ii) the number of cycles guide the process. The evolution of the microstructure is found to be quite similar to foam systems, i.e. topological rearrangements are observed together with the increase of the-mean grain area. A drastic crossover between two types of growth regimes is found as a function of the amplitude of the melting-growth cycles. This allows one to envisage the existence of optimal conditions for polycrystal processing. [less ▲]

Detailed reference viewed: 11 (0 ULg)
See detailPichia anomala strain K against post-hervest diseases
Jijakli, Haissam ULg

Scientific conference (1998, October)

Detailed reference viewed: 6 (0 ULg)
See detailParticipation et intérêt politiques de lycéens français, belges et québécois au début des années quatre-vingt-dix : Une analyse plurielle fondée sur la dynamique de construction des univers de référence
Fournier, Bernard ULg

Doctoral thesis (1998)

Although certain recent theoretical developments insist more on the plurality of social and individual realities, the answers to empirical questions such as Are the young involved? or Are they interested ... [more ▼]

Although certain recent theoretical developments insist more on the plurality of social and individual realities, the answers to empirical questions such as Are the young involved? or Are they interested in politics? still too often fit in a univocal logic of comprehension where concepts used are thought to be homogeneous, as if they were “subsumptions”. This is why it is coherent to explain phenomena from a linear point of view which supposes a precise vision of the processes of construction of individual worlds of reference. Jean Piaget’s perspective of socialization reminds us that the individual is not a passive being in the dynamics of appropriation of the world, but that he assimilates the social context, accommodates it to what he already understands and, thus, transforms it. Consequently, this opens the way to a form of conceptual relativism, with a plural logic of comprehension where each reality, each concept cannot be defined without being replaced in the context of the singular worlds of reference. Thus, the theoretical consideration of the plural possibilities must also emerge from our interpretations. This research challenge is raised in this thesis by studying a series of profiles of dimensions, where each dimension can be replaced in a context which materializes a certain organization of realities. The complexity thus introduced into the analysis is synthesized by multivariate statistical methods (analysis of multiple correspondences and hierarchical ascending classification) which respect the initial organization of profiles. On the basis of data from an original inquiry among French, Belgian and Québécois high-school students, series of “clusters” of similar individuals are presented to describe, in a plural way, their participation and their political interests at the beginning of the nineties. [less ▲]

Detailed reference viewed: 75 (1 ULg)