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See detailNew host and geographical distribution for the pearlfish Carapus mourlani (Pisces, Carapidae) with a discussion on Carapini nomenclature and biogeography
Parmentier, Eric ULg; Mercier, Annie; Hamel, Jean-François

in Copeia (2006), 2006

Specimens of the pearlfish Carapus mourlani (Carapidae) were observed for the first time in association with the sea cucumber Isostichopus fuscus (Holothuroidea: Echinodermata) along the coast of Ecuador ... [more ▼]

Specimens of the pearlfish Carapus mourlani (Carapidae) were observed for the first time in association with the sea cucumber Isostichopus fuscus (Holothuroidea: Echinodermata) along the coast of Ecuador. Out of 4345 sea cucumbers collected from various depths between 5 and 60 m, 12 harbored a pearlfish either in the coelomic cavity, the respiratory tree, or the digestive tract, yielding a prevalence of ca. 0.0028. The presence of C. mourlani appeared to be detrimental to the holothurian host in some cases. Side effects resulting from coelomic cavity infections included less advanced gonad maturity (reduced gonadal tubule diameter and length, lower ratio of mature oocytes) and a significant proportion of necrotic and shriveled gonadal tubules, devoid of gametes. Aside from discussing this evidence, the present paper briefly describes the biology of the pearlfish, its relationship with the host, and its daily activity cycle. [less ▲]

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See detailA new HPLC method for the assay of alkaloids in Strychnos nux-vomica and Strychnos ignatii
Gadi Biala, Rose; Tits, Monique ULg; Wauters, Jean-Noël ULg et al

in Fitoterapia (1996), 67(2), 163-165

A reversed-phase high performance liquid chromatographic procedure was developed for the qualitative and quantitative analysis of the alkaloids in S. nux-vomica and S. ignatii.

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See detailA new HPLC method to quantify alliin, the major sulfur compound in garlic
DETHIER, Bérénice ULg; Laloux, Morgan ULg; Hanon, Emilien et al

Poster (2012, February 10)

Garlic is recognized for centuries for its health benefits, mostly linked to its sulfur- components. Among the products extracted from the cloves, alliin retained our attention. Alliin was synthesized ... [more ▼]

Garlic is recognized for centuries for its health benefits, mostly linked to its sulfur- components. Among the products extracted from the cloves, alliin retained our attention. Alliin was synthesized. This process leads to two stereoisomers. Their HPLC separation was the aim of this work. The method described in the literature (amino column, detection at 210 nm) showed a resolution of 1,1 between the isomers. A second method was developed: the stationary phase was porous graphitic carbon and a water-ACN gradient was used for the elution. It provided a resolution of 3,2, was shorter and underwent the validation process. The method leads to satisfying results. The separation is excellent, and the validation criteria are fulfilled. This may be valuable for future research on garlic. [less ▲]

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See detailA new hybrid approach for modelling groundwater flow in karst aquifers
Willems, Thibault ULg; Hakoun, Vivien ULg; Renard, Philippe et al

Conference (2015, September)

Groundwater flow modelling in karst aquifers represents a real challenge that requires adapted methods. The applicability of an innovative hybrid approach for modelling groundwater flow in karst aquifers ... [more ▼]

Groundwater flow modelling in karst aquifers represents a real challenge that requires adapted methods. The applicability of an innovative hybrid approach for modelling groundwater flow in karst aquifers, namely the Hybrid Finite Element Mixing Cell (HFEMC) method, is evaluated. The hybrid approach consists in combining a classical finite element (FE) model, to model slow flow in the rock matrix, with spatially distributed lumped reservoirs, to model fast flow in the karst conduits network. Water exchanges between the rock matrix and the conduits network are accounted for by means of an internal Fourier boundary conditions (BC). This BC (1st order exchange relation) allows to control the magnitude of water transfers between fast and slow flow domains. We tested the applicability of the HFEMC method on a schematic synthetic domain and on a real karst system. In the synthetic case analysis, we discussed dynamic processes of groundwater storage occurring in the karst system during a recharge pulse. The study focuses on the influence of selected parameters on representative variables such as the discharge curve of the karst system or pressure and mass transfers between conduits and rock matrix sub-domains. In this way, an inversion of the hydraulic gradient between karst conduits and the surrounding rock matrix is shown to occur during the recharge pulse. This phenomenon results in a temporary storage of water from conduits to the rock matrix, which impacts the modelled discharge curve. The first test performed on a real study site, the Noiraigue spring karst system (Jura mountains, Switzerland), exemplify the use of two separated lumped reservoirs for describing the conduits network, which allows to consider two base levels in the karst system. It also points out the challenges to face when modelling a complex natural karst system with the HFEMC approach. The results obtained show that the HFEMC approach is a good candidate to model groundwater flow in karst aquifers. [less ▲]

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See detailA new hybrid exchange-correlation functional for accurate prediction of the electronic and structural properties of ferroelectric oxides
Bilc, Daniel ULg; Orlando, R.; Shaltaf, R. et al

in Physical Review. B, Condensed Matter and Materials Physics (2008), 77

Using a linear combination of atomic orbitals approach, we report a systematic comparison of various density functional theory (DFT) and hybrid exchange-correlation functionals for the prediction of the ... [more ▼]

Using a linear combination of atomic orbitals approach, we report a systematic comparison of various density functional theory (DFT) and hybrid exchange-correlation functionals for the prediction of the electronic and structural properties of prototypical ferroelectric oxides. It is found that none of the available functionals is able to provide, at the same time, accurate electronic and structural properties of the cubic and tetragonal phases of BaTiO3 and PbTiO3. Some, although not all, usual DFT functionals predict the structure with acceptable accuracy, but always underestimate the electronic band gaps. Conversely, common hybrid functionals yield an improved description of the band gaps, but overestimate the volume and atomic distortions associated with ferroelectricity, giving rise to an unacceptably large c/a ratio for the tetragonal phases of both compounds. This supertetragonality is found to be induced mainly by the exchange energy corresponding to the generalized gradient approximation (GGA) and, to a lesser extent, by the exact exchange term of the hybrid functional. We thus propose an alternative functional that mixes exact exchange with the recently proposed GGA of Wu and Cohen [Phys. Rev. B 73, 235116 (2006)] which, for solids, improves over the treatment of exchange of the most usual GGA's. The new functional renders an accurate description of both the structural and electronic properties of typical ferroelectric oxides. [less ▲]

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See detailNew Hypotheses on serial offender's spatial behaviour
Trotta, Marie ULg

in Pundt, Hardy; Bernard, Lars (Eds.) Proceedings 1st AGILE PhD School (2012, March)

Geographic profiling is a methodology used to delineate a prior search area for a serial offender. Two new hypotheses integrating recent researches on offender’s behaviour are proposed to broaden the ... [more ▼]

Geographic profiling is a methodology used to delineate a prior search area for a serial offender. Two new hypotheses integrating recent researches on offender’s behaviour are proposed to broaden the applicability of the techniques of geographic profiling to commuters and irregular patterns of crimes. The journeysto- crime variance and place attractiveness will be successively integrated in GP methods. In order to evaluate the variance of the journeys-to-crime on real road network, a method based on least square adjustment in raster mode is developed. A real case of serial rapes illustrates the effectiveness of those assumptions for a non-uniform pattern of crimes. [less ▲]

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See detailNew hypothesis on the conformation of the PAF receptor from studies on the geometry of selected platelet-activating-factor antagonists
Batt, Jean-Pierre; Lamouri, Aazdine; Tavet, Fabrice et al

in Journal of Lipid Mediators (1991), 4(3), 343-346

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See detailNew identifications of Fe III in the spectra of early B stars.
Swings, Polydore ULg; Edlén, B.; Grandjean, J.

in Astrophysical Journal (1939), 90

Starting from their laboratory measurements, the authors are able to show that about one hundred lines observed in the spectra cf early B-type stars are due to Fe III. The ionization potential of Fe III ... [more ▼]

Starting from their laboratory measurements, the authors are able to show that about one hundred lines observed in the spectra cf early B-type stars are due to Fe III. The ionization potential of Fe III is 30.48 volts. [less ▲]

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See detailNew illumination technique for IR-video guided patch-clamp recording from neurons in slice cultures on biomembrane
Alix, Philippe ULg; Winterer, J; Muller, W

in Journal of Neuroscience Methods (2003), 128

Slice cultures on biomembrane are the method of choice for studying Ca2 -dependent plastic changes occurring over several days to weeks. Using IR-differential interference contrast, good visualization of ... [more ▼]

Slice cultures on biomembrane are the method of choice for studying Ca2 -dependent plastic changes occurring over several days to weeks. Using IR-differential interference contrast, good visualization of neurons in biomembrane slice cultures has been achieved despite a negative optical effect of the biomembrane, but epifluorescence imaging requires removal of a Wollaston prism and the analyzer. Here, we describe a novel illumination method to overcome this problem. Using optic fiber illumination at a shallow angle from the top of the slice culture, with or without additional illumination from the bottom, we obtained good cellular resolution of neurons in biomembrane slice cultures as well as in acute slices with an infrared-video camera. With this technique, we demonstrate visually guided whole-cell patch-clamp recording of Na - and K -currents as well as combination of whole-cell recording with fluorescence imaging of hippocampal and entorhinal cortex neurons in biomembrane slice cultures. Our inexpensive method should prove very useful for studying in vitro effects of long-term manipulations on membrane currents and intracellular Ca2 -signaling. # 2003 Elsevier B.V. All rights reserved. [less ▲]

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See detailNew Immigrants and Democratic Society. Minority Integrations in Western Societies
Martiniello, Marco ULg

in International Migration Review (1993), 27(101), 204-205

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See detailNew Improvements in the Enantioselective Synthesis of 2-[18F]Fluoro-L-Tyrosine and 6-[18F]Fluoro-L-Dopa
Libert, Lionel ULg; Lemaire, Christian ULg; Denoël, Thibaut ULg et al

in Journal of Labelled Compounds & Radiopharmaceuticals (2009, July), 52(S1), 196

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See detailNew in situ generated ruthenium catalysts bearing N-heterocyclic carbene ligands for the ring-opening metathesis polymerization of cyclooctene
Delaude, Lionel ULg; Szypa, Magdalena; Demonceau, Albert ULg et al

in Advanced Synthesis & Catalysis (2002), 344(6-7), 749-756

New 1,3-diarylimidazol(in)ium chlorides bearing phenyl, 1-naphthyl, 4-biphenyl, 2-tolyl, 2,6-dimethylphenyl, and 3,5-dimethylphenyl substituents were synthesized. They were combined with [RuCl2 (p-cymene ... [more ▼]

New 1,3-diarylimidazol(in)ium chlorides bearing phenyl, 1-naphthyl, 4-biphenyl, 2-tolyl, 2,6-dimethylphenyl, and 3,5-dimethylphenyl substituents were synthesized. They were combined with [RuCl2 (p-cymene)](2) and potassium tert-butoxide or sodium hydride to generate the corresponding ruthenium-N-heterocyclic carbene complexes in situ. Catalyst precursors derived from imidazol(in)ium salts bearing the 2,4,6-trimethylphenyl (mesityl) and the 2,6-diisopropylphenyl groups were also prepared. The catalytic activity of all these species in the photoinduced ring-opening metathesis polymerization of cyclooctene was investigated. The C4-C5 double bond in the imidazole ring of the N-heterocyclic carbene ligands was not crucial to achieve high catalytic efficiencies. The presence or the absence of alkyl groups on the ortho positions of the phenyl rings had a more pronounced influence. Blocking all the ortho positions was a requisite for obtaining efficient catalysts. Failure to do so probably results in the ortho-metallation of the carbene ligand, thereby altering the coordination sphere of the ruthenium active centers. [less ▲]

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See detailA new in vitro model of Microsporum canis dermatophytosis in reconstituted feline skin
Tabart, J.; Baldo, Aline ULg; Vermout, S. et al

Conference (2006)

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See detailA new in vitro protocol to study HGF/HGK attachment and proliferation on prostheses materials
GRENADE, Charlotte ULg; MAINJOT, Amélie ULg; VAN HEUSDEN, Alain ULg et al

in Dental Materials (2013, December), 29(E15-E16),

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See detailA new in-silico method for determination of helical transmembrane domains based on the PepLook scan: application to IL-2Rbeta and IL-2Rgammac receptor chains.
Charlois, Yan; Lins, Laurence ULg; Brasseur, Robert ULg

in BMC Structural Biology (2011), 11

BACKGROUND: Modeling of transmembrane domains (TMDs) requires correct prediction of interfacial residues for in-silico modeling and membrane insertion studies. This implies the defining of a target ... [more ▼]

BACKGROUND: Modeling of transmembrane domains (TMDs) requires correct prediction of interfacial residues for in-silico modeling and membrane insertion studies. This implies the defining of a target sequence long enough to contain interfacial residues. However, too long sequences induce artifactual polymorphism: within tested modeling methods, the longer the target sequence, the more variable the secondary structure, as though the procedure were stopped before the end of the calculation (which may in fact be unreachable). Moreover, delimitation of these TMDs can produce variable results with sequence based two-dimensional prediction methods, especially for sequences showing polymorphism. To solve this problem, we developed a new modeling procedure using the PepLook method. We scanned the sequences by modeling peptides from the target sequence with a window of 19 residues. RESULTS: Using sequences whose NMR-structures are already known (GpA, EphA1 and Erb2-HER2), we first determined that the hydrophobic to hydrophilic accessible surface area ratio (ASAr) was the best criterion for delimiting the TMD sequence. The length of the helical structure and the Impala method further supported the determination of the TMD limits. This method was applied to the IL-2Rbeta and IL-2Rgamma TMD sequences of Homo sapiens, Rattus norvegicus, Mus musculus and Bos taurus. CONCLUSIONS: We succeeded in reducing the variation in the TMD limits to only 2 residues and in gaining structural information. [less ▲]

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See detailNew indications for radiotherapy: primary liver cancer and secondary liver oligometastases
JANVARY, Zsolt Levente ULg; JANSEN, Nicolas ULg; MARTINIVE, Philippe ULg et al

in Belgian Journal of Medical Oncology [=BJMO] (2011), 5(1), 8-13

Surgery is considered to be the standard treatment for intrahepatic malignancies, primary <br />cancers and metastatic lesions. However, a great many patients are not eligible for surgical <br ... [more ▼]

Surgery is considered to be the standard treatment for intrahepatic malignancies, primary <br />cancers and metastatic lesions. However, a great many patients are not eligible for surgical <br />intervention. Modern stereotactic radiotherapy has the potential to be an effective alternative <br />treatment modality with low toxicity for patients with primary hepatocellular carcinoma <br />and liver oligometastases. In this paper we intend to review the current status and published <br />experiences in the field of liver irradiation. [less ▲]

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See detailNew indole aldehydic alkaloids of Strychnos variabilis
Tits, Monique ULg; Angenot, Luc ULg; Tavernier, Dirk

in Tetrahedron Letters (1980), 21

Two isomeric pairs of novel indoline aldehydic alkaloids have been isolated from the root barks of Strychnos variabillis. The isomerism finds its origin in the facile isomerisation of C16 and is set up ... [more ▼]

Two isomeric pairs of novel indoline aldehydic alkaloids have been isolated from the root barks of Strychnos variabillis. The isomerism finds its origin in the facile isomerisation of C16 and is set up rapidly at room temperature. So, they could be the biogenetic starting point of two series of alkaloids which have a different stereochemistry for C16: the "retuline" series and the epimer "isoretuline" series. [less ▲]

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See detailNew Industrial Product Performance: Models and Empirical Analysis
Choffray, Jean-Marie ULg; Lilien, Gary L.; Yoon, Eusang

in Woodside, A. (Ed.) Advances in Business Marketing (1988)

In this chapter we review methods that are used to evaluate the likely sales level for new industrial products and discuss the relation between those methods and what we know about innovation diffusion ... [more ▼]

In this chapter we review methods that are used to evaluate the likely sales level for new industrial products and discuss the relation between those methods and what we know about innovation diffusion. Our model-based methodology can be used to help plan entry stratégies as well as to forecast market penetration. [less ▲]

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See detailA new inhibition task for young children: The “Real Size Animal” task
Catale, Corinne ULg; Meulemans, Thierry ULg

in Books of Conference Abstract: The 9th European Conference on Psychological Assessment (2007)

In neuropsychology, inhibition deficits underlie a variety of cognitive and behavioural dysfunctions and are reported in numerous developmental and acquired disorders (such as Attention Deficit and ... [more ▼]

In neuropsychology, inhibition deficits underlie a variety of cognitive and behavioural dysfunctions and are reported in numerous developmental and acquired disorders (such as Attention Deficit and Hyperactivity Disorders–ADHD). Despite a large body of literature regarding inhibition functioning in adult’s neuropsychology, developmental studies on inhibition remained for a long time scarce. Furthermore, most inhibition tools were originally developed for adults and are of limited interest in children – particularly in pre-school children. In this study, we present a new computerized measure of inhibition suitable to young children. This task includes three conditions. The two first conditions assess speed processing and require children to decide quickly, by pressing a response-key, [1] the real size of animals (bird =small) and [2] the on screen size of black rectangles (big or small). The third condition measures inhibition and requires deciding the real size of animals displayed in congruent (big elephant) or incongruent size (big bird) on the screen. Sixty children without neurological disorders and twelve ADHD children aged from 4 to 10 took part in this study. Our aims were to examine the developmental curve of inhibition abilities and to determine the task’s sensitivity in ADHD children. Results show that this task is particularly suitable to preschooler children and provides a good measure of inhibition development (p<.01). Furthermore, this task appears sensitive to inhibition’s disturbances in ADHD children (p<.05). In conclusion, these preliminary results support the validity of this measure to assess inhibition control in young children and its clinical interest in ADHD children. [less ▲]

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