References of "2008"
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See detail"Strategies of life detection": Summary and outlook
Botta, Oliver; Bada, Jeffrey L; Gomez-Elvira, Javier et al

in Space Science Reviews (2008), 135(1-4), 371-380

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See detailLe purisme enfantin au prisme du discours spontané
Meunier, Deborah ULg

in Français Moderne (Le) (2008), LXXXVI/1

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See detailIron microbial mats in Modern and Phanerozoic environments
Baele, J. M.; Boulvain, Frédéric ULg; De Jong, J. et al

in Instruments, Methods and Missions for Astrobioçlogy- Proc. of SPIE (2008), 7097

The recognition of iron microbial mats in terrestrial environments is of great relevance for the search for extraterrestrial life, especially on mars where significant iron minerals were identified in the ... [more ▼]

The recognition of iron microbial mats in terrestrial environments is of great relevance for the search for extraterrestrial life, especially on mars where significant iron minerals were identified in the subsurface. Most researches focused on very ancient microbial mats (e.g. BIFs) since they formed on Earth at a time where similar conditions are supposed to have prevailed on Mars too. However, environmental proxies are often difficult to use for these deposits on Earth which, in addition, may be heavily transformed due to diagenesis or even metamorphism. Here we present modern and phanerozoic iron microbial mats occurrences illustrating the wide variety of environments in which they form, including many marine settings, ponds, creeks, caves, volcanoes, etc. Contrarily to their Precambrian counterparts, Modern and Phanerozoic deposits are usually less affected by diagenesis and the environmental conditions likely to be better constrained. Therefore, their investigation may help for the search for morphological and geochemical biosignatures (e.g. iron isotopes) in ancient iron microbial occurrences on Earth but also on other Planets. In particular, many of the case studies presented here show that microstromatolithe-like morphologies may be valuable targets for screening potential biosignatures in various rock types. [less ▲]

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See detailOn the evolution and expression of Chlamydomonas reinhardtii nucleus-encoded transfer RNA genes
Cognat, Valerie; Deragon, Jean*-Marc; Vinogradova, Elizaveta et al

in Genetics (2008), 179(1), 113-123

In Chlamydomonas reinhardtii, 259 tRNA genes were identified and classified into 49 tRNA isoaccepting families. By constructing phylogenetic trees, we determined the evolutionary history for each tRNA ... [more ▼]

In Chlamydomonas reinhardtii, 259 tRNA genes were identified and classified into 49 tRNA isoaccepting families. By constructing phylogenetic trees, we determined the evolutionary history for each tRNA gene family. The majority of the IRNA sequences are more closely related to their plant counterparts than to animals ones. Northern experiments also permitted LIS to show that at least one member of each IRNA isoacceptor family is transcribed and correctly processed in vivo. A short stretch of T residues known to be a signal for termination of polymerase III transcription was found downstream of most IRNA genes. It allowed us to propose that the vast majority of the IRNA genes are expressed and to confirm that numerous IRNA genes separated by short spacers are indeed cotranscribed. Interestingly, in silico analyses and hybridization experiments show that the cellular IRNA abundance is correlated with the number of tRTNA genes and is adjusted to the codon usage to optimize translation efficiency. Finally, we studied the origin of SINEs, short interspersed elements related to tRNAs, whose presence in Chlamydomonas is exceptional. Phylogenetic analysis strongly suggests that tRNA(Asp)-related SINEs originate front a prokaryotic-type IRNA either horizontally transferred from a bacterium or originally present in mitochondria or chloroplasts. [less ▲]

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See detailDe onzin van het vanzelfsprekende beeld
Meesters, Gert ULg

in Freespace Nieuwzuid (2008), (31), 47-56

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See detailPresent and future role of ion beam analysis in the study of cultural heritage materials: The example of th AGLAE facility
Salomon, Joseph; Dran, Jean-Claude; Guillou, T. et al

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (2008), 266

The application of IBA to cultural heritage mostly relies on the use of PIXE because of its high sensitivity and its ease of implementation at atmospheric pressure. The need for depth information not ... [more ▼]

The application of IBA to cultural heritage mostly relies on the use of PIXE because of its high sensitivity and its ease of implementation at atmospheric pressure. The need for depth information not easily available with this technique has conducted to associate RBS also in external beam mode. We have progressively developed a set-up that permits such a combination of techniques either simultaneously or sequentially. The set-up is currently further improved to permit NRA measurement (depth profiles of light elements) in addition to PIXE and RBS. The coupling of all these techniques provides a wealth of information on cultural heritage objects, not easily attainable with any other single method. [less ▲]

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See detailAn experimental analysis of effects induced by moving bodies in shallow water
Kerger, François ULg; Detrembleur, Sylvain ULg; Archambeau, Pierre ULg et al

in Proc. 2nd International Junior Researcher and Engineer Workshop on Hydraulic Structures (2008)

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See detailAvis n°44 du 23 juin 2008 relatif à l'inhibition de la croissance d'enfants très sévèrement handicapés mentalement
Hiele, M.; Genicot, G.; Mortier, F. et al

Report (2008)

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See detailh- and b-conform finite element perturbation techniques for nondestructive eddy current testing
V Sabariego, Ruth ULg; Dular, Patrick ULg

in COMPEL (2008), 27(1), 319-327

Purpose - The aim of the present paper is to compare the performances of a finite-element perturbation technique applied either to the h- conform magnetodynamic formulation or to its b-conform counterpart ... [more ▼]

Purpose - The aim of the present paper is to compare the performances of a finite-element perturbation technique applied either to the h- conform magnetodynamic formulation or to its b-conform counterpart in the frame of nondestructive eddy-current testing problems. Design/methodology/approach - In both complementary perturbation techniques, the computation is split into a computation without defect (unperturbed problem) and a computation of the field distorsion due to its presence (perturbation problem). The unperturbed problem is conventionally solved in the complete domain. The source of the perturbation problem is then determined by the projection of the unperturbed solution in a relatively small region surrounding the defect. The discretisation of this reduced domain is chosen independently of the dimensions of the excitation probe and the specimen under study and is thus well adapted to the size of the defect. Findings - The accuracy of the perturbation model is evidenced by comparing the results of the two counterpart formulations to those achieved in the conventional way for different dimensions of the reduced domain. The size of the reduced domain increases with the size of the defect at hand. This proposed sub-domain approach eases considerably the meshing process and speeds-up the computation for different probe positions. Originality/value - At a discrete level, the impedance change due to the defect is efficiently and accurately computed by integrating only over the defect itself and a layer of elements in the reduced domain that touches its boundary. Therefore, no integration of any flux variation in the coils is required. [less ▲]

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See detailLeaves of Bigaradier (Citrus aurantium) dried by micro-onde for the storage
Dahak, K.; Wathelet, Jean-Paul ULg; Chechounai, H. et al

Poster (2008)

In this paper, our goal is to develop methods to choose the good drying and storage processes for medicinal and aromatic plants. We project the study of the kinetics of drying of the leaves of Bigaradier ... [more ▼]

In this paper, our goal is to develop methods to choose the good drying and storage processes for medicinal and aromatic plants. We project the study of the kinetics of drying of the leaves of Bigaradier. This Mediterranean plant is known by its therapeutic properties. [less ▲]

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See detailTutta colpa di Mick Jagger
Montana, Cyril; Ricciardi, Stefania ULg

Book published by Excelsior1881 (2008)

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See detailLa biosynthèse des isoprenoides chez les pucerons: une cible potentielle de nouveaux bio-insecticides?
Vandermoten, Sophie ULg; Cusson, Michel; Francis, Frédéric ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2008), 12(4),

Actuellement, le contrôle des pucerons repose en grande partie sur l'utilisation d'insecticides de synthèse. Toutefois, l'effet néfaste de ceux-ci sur l'environnement, ainsi que le développement croissant ... [more ▼]

Actuellement, le contrôle des pucerons repose en grande partie sur l'utilisation d'insecticides de synthèse. Toutefois, l'effet néfaste de ceux-ci sur l'environnement, ainsi que le développement croissant de populations résistantes conduit à rechercher de nouvelles méthodes de lutte. Parmi celles-ci, une des voies actuellement envisagée est la formulation de nouveaux bio-insecticides ciblant et perturbant les fonctions biochimiques de l'insecte. En raison de la haute spécificité des agents utilisés, ces méthodes de contrôle des ravageurs ne présentent généralement que peu de risque pour l'environnement, les espèces non ciblées et la santé humaine. Dans le contexte de la lutte contre les pucerons, la voie de biosynthèse des isoprénoïdes, et plus particulièrement les enzymes de la famille des " short-chain " isoprényle diphosphate synthases, s'avère être une cible intéressante pour le développement de ces nouveaux agents de contrôle. En effet, chez les pucerons, cette voie de biosynthèse est associée à la production des mono- et sesquiterpènes, deux classes d'isoprénoïdes jouant des rôles importants au niveau de la physiologie des pucerons [less ▲]

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See detailAvatars du ci-devant siège princier-épiscopal aux XIXe et XXe siècles
Duchesne, Jean-Patrick ULg; Graulich, Isabelle

in Demoulin, Bruno; Kupper, Jean-Louis (Eds.) Le pays de Liège et son palais (2008)

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See detailLa copropriété par appartements
Lecocq, Pascale ULg

Book published by La Charte (2008)

L'ouvrage analyse les thèmes principaux de la copropriété par appartements (Champ d'application, association des copropriétaires, organes, contentieux, transmission d'un lot, comptabilité, conciliation et ... [more ▼]

L'ouvrage analyse les thèmes principaux de la copropriété par appartements (Champ d'application, association des copropriétaires, organes, contentieux, transmission d'un lot, comptabilité, conciliation et médiation, ...) au regard de la pratique issue de la loi du 30 juin 1994 et de la nouvelle proposition de loi en la matière. [less ▲]

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See detailDroit à l'information et la participation du public
Delnoy, Michel ULg

in L'environnement dans le droit de l'urbanisme en Europe (2008)

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See detailMultiscale modeling of equal channel angular extruded aluminium with strain gradient crystal plasticity and phenomenological models
Duchene, Laurent ULg; Geers, M. G. D.; Brekelmans, W. A. M. et al

in Rollett, A. (Ed.) Proceedings of the 15th International Conference on the Texture of Materials (ICOTOM-15) (2008)

The Equal Channel Angular Extrusion process is used to modify the microstructure of an AA1050 aluminum alloy in order to produce an ultra fine grained material. Due to the severe plastic deformation ... [more ▼]

The Equal Channel Angular Extrusion process is used to modify the microstructure of an AA1050 aluminum alloy in order to produce an ultra fine grained material. Due to the severe plastic deformation undergone by the material during the ECAE process, the subsequent behavior of the material is non-conventional and difficult to model with classical constitutive laws (e.g. ECAE aluminum presents a large initial back-stress which must be adequately incorporated in the model). In this study, the evolution of the back-stress during the ECAE process is analyzed. Two different numerical models were investigated in this respect. The first one is a single crystal strain gradient plasticity model based on dislocation densities. The second model is the Teodosiu and Hu’s hardening model, which is a microstructuraly based phenomenological model at the macroscale. The results provided by the two models are obviously distinct. Nevertheless, some common trends can be pointed out, among which the amplitude of the back-stress that is similar. In agreement with the cyclic deformation mode of the studied route C ECAE process, the evolution of the predicted back-stress is also cyclic in both models. [less ▲]

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See detailEvolution des modalités d'évaluation de la fonction rénale basée sur la créatinine entre 2005 et 2008: conséquences pour les biologistes
Séronie-Vivien, S.; Piéroni, L.; Galteau, M.-M. et al

in Annales de Biologie Clinique (2008), 66(3), 263-8

Les recommandations internationales de 2005 concernant l’insuffisance rénale chronique proposent une classification basée sur le débit de filtration glomérulaire (DFG). Depuis cette date, la question ... [more ▼]

Les recommandations internationales de 2005 concernant l’insuffisance rénale chronique proposent une classification basée sur le débit de filtration glomérulaire (DFG). Depuis cette date, la question posée de la validité des formules évaluant le DFG, et des créatininémies qui y sont insérées, se pose de façon encore plus cruciale qu’il y a quelques années. Pour les biologistes, les conséquences de ces recommandations cliniques sont importantes. En premier lieu, la formule classique de Cockcroft-Gault doit être abandonnée au profit de l’équation dite MDRD à 4 variables, et ce malgré les recommandations officielles françaises actuelles, qui devraient être modifiées d’ici peu. D’autre part, afin d’optimiser l’évaluation du DFG par cette formule, les biologistes doivent choisir entre la version dite « 186 » de l’équation MDRD, adaptée aux méthodes de dosage de la créatininémie non raccordées à la méthode de référence (chromatographie liquide ou gazeuse couplée à la spectrométrie de masse) et la version dite « 175 », adaptée aux méthodes de dosages raccordées. A ce jour, seules certaines méthodes enzymatiques ont fait la preuve de leur raccordement à une méthode de référence. L’avenir des méthodes colorimétriques classiques est incertain. [less ▲]

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