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See detailNGC6231: X-ray Properties of the Early-Type Star Population
Sana, H.; Nazé, Yaël ULg; Gosset, Eric ULg et al

in Massive Stars in Interactive Binaries (2007)

Based on a deep XMM-Newton observation of the young open cluster NGC6231, we derive the main X-ray properties of its early-type star population. Among the 610 X-ray sources detected in the field, 42 are ... [more ▼]

Based on a deep XMM-Newton observation of the young open cluster NGC6231, we derive the main X-ray properties of its early-type star population. Among the 610 X-ray sources detected in the field, 42 are associated with early-type stars. We investigate their L[SUB]X[/SUB]/L[SUB]bol[/SUB] relationship and confirm the clear dichotomy between O- and B-type stars. The cut-off line between the two behaviours occurs at L[SUB]bol[/SUB] ~ 10[SUP]38[/SUP] erg s[SUP]-1[/SUP] as previously proposed by Berghöfer et al. (1997). The distinction between single and binary stars is not clear cut, except for the colliding wind system HD152248. The X-ray detected B-stars in NGC6231 appear to be more luminous than predicted from the Berghöfer et al. relation. Though this suggests a bimodal distribution of the B-star X-ray emission, we caution however that these results might be biased by detection limits. Finally we investigate the X-ray variability of the detected sources and we find that about 40% of the X-ray emitters in the field of view present consistent signs of variability in the EPIC instruments. This fraction is much larger than previously thought. About one third of the early-type star population, either singles or binaries, further show variability. These variations do not seem to be exclusively related to binarity and could thus not be systematically interpreted in the framework of a wind-wind collision phenomenon. [less ▲]

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See detailNghiên cứu một số chỉ tiêu chất lượng thịt của bò Lai Sind, Brahman x Lai Sind và Charolais x Lai Sind tại Đăk Lăk
Hue, Pham The; Binh, Dang Vu; Chinh, Dinh Van et al

in Journal of Science and Development (2008), 4(4), 331-337

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See detailNghiên cứu và thiết kế hai kiểu chuồng nuôi nhông cát Leiolepis guttata (Cuvier, 1829) phù hợp với điều kiện nuôi và vốn đầu tư tại huyện Bắc Bình, tỉnh Bình Thuận
Tran, Tinh ULg; Tran, Ngoc Nguyen Kim Dieu; Vo, Kim Thong et al

in Journal of Agriculture Sciences and Technology (2015), 1/2014

Building of an enclosure for rearing of the spotted butterfly lizard, Leiolepis guttata (Cuvier, 1829), by the first farmer in 2004 (in Hong Chinh commune, Hoa Thang ward, Bac Binh district, Binh Thuan ... [more ▼]

Building of an enclosure for rearing of the spotted butterfly lizard, Leiolepis guttata (Cuvier, 1829), by the first farmer in 2004 (in Hong Chinh commune, Hoa Thang ward, Bac Binh district, Binh Thuan province) is considered as a fortuitous discovery which was the initiator of the current expanding trend of its rearing. Because L. guttata is a wild animal, with strong disease resistance and adaptation capacity, livestock farmers are presently not very interested in important aspects: rearing techniques, enclosure’s types, sex ratio, diseases’ prevention, etc. Notably the building of enclosures not perfectly suitable breeds a noticeable loss of the number of lizards and a reduction in the profits for the farmers. To this end, the building of two types of enclosures adapted to local rearing conditions and the investing capital available in Bac Binh district, Binh Thuan province is presently essential. We descrite two types of enclosure: the first one surrounded by a bricks (or breeze blocks) wall, the second one fended by a fiber cement corrugated sheets wall. Moreover, we suggest to introduce plants in order to build a vegetal cover nearer to the natural environment of L. guttata: shrubs and a plant carpet becoming the preferential refuge area of the spotted butterfly lizard. [less ▲]

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See detailNGOs and female circumcision in Egypt. An anthropological enquiry.
Mescoli, Elsa ULg

in Journal of the Anthropology of the Contemporary Middle East and Central Eurasia (2015)

In 1994, during the International Conference on Population and Development convened by the United Nations in Cairo, a shocking video was shown, realized by an operator of CNN and depicting the ... [more ▼]

In 1994, during the International Conference on Population and Development convened by the United Nations in Cairo, a shocking video was shown, realized by an operator of CNN and depicting the circumcision of a ten-year-old child living in this very same city. Discourses around female circumcision were not new in Egypt and in the international community, but what was considered as a new episode of a recurrent scandal (not the last one indeed) led to enhance the "war against bad government"[1]. A war fought by means of ideological weapons produced by expert knowledges among which the medical and the feminist ones. The assignment of a value to the state of integrity of the female body and to the women freedom of choice, both designed according to Western canons, led to different actions to “save” Egyptian women. In this context, development agencies fosters a widespread representation of the victim, constituted by the woman mutilated body. Such representation is functional to put in place programs which do not guarantee a freedom of choice, but rather require adherence to another female model, one that defines the "modern" woman. My article, based on ethnographic experience, aims at highlighting the complexity of such dynamics and the role played by humanitarianism within them. Female body becomes the arena where local and international economic powers operate, disregarding a real understanding of the practice, its meanings and its eventual change. ________________________________________ [1] Foucault, Michel. La nascita della clinica. Il ruolo della medicina nella costituzione delle scienze umane, Einaudi, Torino 1969: 48. [less ▲]

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See detailNgugi's “Journey of the Magi”: Part II of Petals of Blood
Pagnoulle, Christine ULg

in Research in African Literatures (1985), 16(2), 264275

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See detailNH-1,2,3-Triazole-based Inhibitors of the VIM-2 Metallo-β- Lactamase: Synthesis and Structure-Activity Studies
Weide, Timo; Saldanha, S. Adrian; Minond, Dmitriy et al

in ACS Medicinal Chemistry Letters (2010), 1(4)

Metallo-ß-lactamases (MBL) are an emerging cause of bacterial resistance to antibiotic treatment. The VIM-2 ß-lactamase is the most commonly encountered MBL in clinical isolates worldwide. Described here ... [more ▼]

Metallo-ß-lactamases (MBL) are an emerging cause of bacterial resistance to antibiotic treatment. The VIM-2 ß-lactamase is the most commonly encountered MBL in clinical isolates worldwide. Described here are potent and selective small molecule inhibitors of VIM-2 containing the arylsulfonyl-NH-1,2,3-triazole chemotype that potentiate the efficacy of the ß-lactam, imipenem, in E. coli. [less ▲]

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See detailNHC-Ru complexes- Friendly catalytic tools for manifold chemical transformations
Dragutan, Valerian; Dragutan, Ileana; Delaude, Lionel ULg et al

in Coordination Chemistry Reviews (2007), 251(5-6), 765-794

N-Heterocyclic carbenes are now commonly encountered in organometallic and inorganic coordination chemistry. The increasing attention they enjoy is due to their ability to act as ancillary ligands in a ... [more ▼]

N-Heterocyclic carbenes are now commonly encountered in organometallic and inorganic coordination chemistry. The increasing attention they enjoy is due to their ability to act as ancillary ligands in a growing number of transition metal catalysts or even to play the role of nucleophilic reagents and catalysts in diverse organic transformations. As a fine addition to the NHC-Ru-alkylidenes, popular for their tremendous success in metathesis chemistry, an array of robust and stable Ru-NHCs has proven their utility in non-metathetical reactions. The present review surveys different classes of Ru-NHCs and their applications as efficient catalysts (or precatalysts) in several types of fundamental organic processes e.g. hydrogenation, hydrogen transfer, isomerization, cycloisomerization, cyclopropanation, hydrosilylation, allylation and deallylation, enol-ester synthesis, heterocycle synthesis, C-C alkyne coupling, Kharasch addition and ATRP. A special section is devoted to tandem processes some of which include concurrent or sequential metathesis steps. Relevant mechanistic and stereochemical aspects related to NHC-Ru catalysis will be highlighted. (c) 2006 Elsevier B.V. All rights reserved. [less ▲]

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See detailNi fantôme ni zombie. L'émergence de la conscience subjective dans le flux des expériences
Leclercq, Bruno ULg

in Bulletin d'Analyse Phénoménologique (2014), 10(3), 1-28

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See detailNi mécanique, ni rationnel. Un point de vue interactionnel sur la communication animale
Servais, Véronique ULg

in Wittezaele, Jean-Jacques (Ed.) La double contrainte. L'influence des paradoxes de Bateson en sciences humaines (2008)

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See detailNi réalisme ni conventionalisme : Edmund Husserl et Ludwig Wittgenstein, philosophes de la logique et des mathématiques
Leclercq, Bruno ULg

in Beets, François; Gillet, Eric (Eds.) Logique en perspective (2000)

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See detailNi théoriser les pratiques, ni pratiquer les théories – Une rencontre improbable
Delhalle, Nancy ULg

Conference (2013, October 08)

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See detailNi utopie ni solidarisme. Une refonte matérialiste et critique de l'association est-elle possible ?
Frère, Bruno ULg

in Delaunay, Catarina (Ed.) Democracia, promessas, utopias e (des)ilusoes : dilemas e disputas nas arenas publicas (2017)

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See detailNi-Cu/SiO2 cogelled xerogel catalysts for selective hydrodechlorination of 1,2-dichloroethane into ethylene
Lambert, Stéphanie ULg

Conference (2015, August 13)

Hydrodechlorination of chlorinated organics is a particularly attractive alternative compared with incineration of wastes from the chlorine industry from both economic and environmental points of view ... [more ▼]

Hydrodechlorination of chlorinated organics is a particularly attractive alternative compared with incineration of wastes from the chlorine industry from both economic and environmental points of view. Several authors demonstrated the ability of bimetallic catalysts, composed of metals from Groups VIII and IB, to convert chlorinated alkanes selectively into less or not chlorinated alkenes. The purpose of this study is to measure catalytic activity and selectivities of 1,2-dichloroethane hydrodechlorination over Ni-Cu/SiO2 cogelled xerogel catalysts and to study relationships between catalytic activity and surface properties of bimetallic catalysts. To understand the mechanism of hydrodechlorination of 1,2-dichloroethane on a supported alloy, the surface composition of Ni-Cu alloy is measured from H2 chemisorption, XRD and TEM. Values obtained indicate a very pronounced surface enrichment with copper. Samples containing various amounts of nickel and copper are xerogels prepared by a one-step sol-gel procedure, which consists in the cogelation of the silica precursor, tetraethoxysilane (TEOS), with organically substituted alkoxides capable of forming chelates with nickel and copper ions. The resulting alcogels were dried under vacuum at 80°C, calcined in air at 400°C, and finally reduced in hydrogen at 450°C. For each catalytic experiment, 0.11 g of catalyst pellets were tested. The temperature was successively kept at 200, 250, 300, 350 and 300°C. While 1,2-dichloroethane hydrodechlorination over pure nickel mainly produces ethane, increasing copper content in bimetallic catalysts results in an increase in ethylene selectivity. Used alone, copper deactivates rapidly due to their covering by chlorine atoms. When nickel is present, it supplies hydrogen atoms for the regeneration of the chlorinated copper surfaces into metallic copper. The specific consumption rate of 1,2-dichloroethane decreases when copper loading increases. The turnover frequency, that is, the number of catalytic cycle per active site (nickel atom and its surrounding copper atoms) and per second, seems to be independent of surface composition of alloy particles. [less ▲]

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See detailNi-doped carbon xerogels for H2 storage
Zubizarreta, Leire; Menénez, J. A.; Pis, J. J. et al

Poster (2009, October 25)

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See detailNi-doped carbon xerogels for H2 storage
Zubizarreta, Leire; Menendez, J. A.; Job, Nathalie ULg et al

in Carbon (2010), 48

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See detailNi/Al2O3 xerogel catalysts for biogas cleaning
Claude, Vincent ULg; Heinrichs, Benoît ULg; Lambert, Stéphanie ULg

Poster (2013, August 29)

This poster summarize the firsts results of the PhD project started on October 2012 about the catalytic purification of biogas. The aim of this project consists in the development of Ni/Al2O3 catalyst in ... [more ▼]

This poster summarize the firsts results of the PhD project started on October 2012 about the catalytic purification of biogas. The aim of this project consists in the development of Ni/Al2O3 catalyst in order to reform the tars present in the outlet gas of biomass gasifier. In order to obtain catalysts with high performance and lifetime, materials need to have optimized specific surface and metal particle dispersion. This poster investigate the effect of different surfactants (Pluronic P123; F127; stéarique acide, EDAS) on the materials properties. [less ▲]

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See detailNi/SiO2 Catalyst Preparation Studies using SBA-15 as a Model Support and quantitative Electron Tomography Characterisation
de Jongh, Petra; Friedrich, Heiner; Gommes, Cédric ULg et al

Poster (2008, September)

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