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See detailNewly Synthesized mRNA Is Translated During the Initial Imbibition Phase of Germinating Maize Embryo
Dommes, Jacques ULg; Van de Walle, Claude ULg

in Plant Physiology (1983), 73(2), 484-487

RNA synthesis is activated in the cells of the plant embryo very soon after the start of seed imbibition. We previously reported that mainly heterogeneous nuclear RNA is synthesized in the radicle of Zea ... [more ▼]

RNA synthesis is activated in the cells of the plant embryo very soon after the start of seed imbibition. We previously reported that mainly heterogeneous nuclear RNA is synthesized in the radicle of Zea mays embryo during the first hours of germination. The present study was undertaken in order to detect the time of appearance of the newly synthesized messenger RNA in the polysomes of germinating maize axes.Free polysomes were prepared from embryonic axes rehydrated for 2 hours in the presence of radioactively labeled uridine. These polysomes were shown to be labeled and to contain labeled particles sedimenting, after dissociation with EDTA, in the 10S to 40S region of a sucrose gradient. The labeled polysomal RNA migrates heterogeneously in a gel with a mean size corresponding to about 16S, and 60% of these molecules are polyadenylated.The data indicate that the newly synthesized RNA associated with the polysomes after 2 h of germination consists of messenger RNA molecules. Analysis of the polysomes prepared 0.5 and 1 h after the start of imbibition suggests that translation of the newly synthesized messenger RNA probably occurs within the 1st hour of imbibition of the isolated axis, thus well before the completion of the initial water uptake. [less ▲]

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See detailA Newmark-type integrator for flexible systems considering nonsmooth unilateral constraints
Chen, Qiongzhong ULg; Acary, Vincent; Virlez, Geoffrey ULg et al

in Proceedings of the First Joint International Conference on Multibody System Dynamics (2012, June)

Mechanical systems are usually subjected not only to bilateral constraints but also to unilateral constraints. Inspired by the HHT time integration method for smooth flexible multibody dynamics, this ... [more ▼]

Mechanical systems are usually subjected not only to bilateral constraints but also to unilateral constraints. Inspired by the HHT time integration method for smooth flexible multibody dynamics, this paper presents a Newmark-type integrator, denoted by nonsmooth HHT method, to include the nonsmooth property of unilateral constraints. Through numerical examples accounting for both rigid and flexible body models, a bunch of methods are compared with the unilateral constraints on both velocity level and position level. Results show that the presented nonsmooth HHT method benefits from the accuracy and stability property of the classical HHT method with controllable numerical damping. In particular, when it comes to the analysis of flexible systems, the nonsmooth HHT method shows much better accuracy property than that of the other methods, including the Moreau–Jean time-stepping method and the fully implicit Newmark methods. [less ▲]

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See detailNews from Belgium
Sacré, Robert ULg

in Living BluesLetter (1984), 2(5-6),

Annonce de la Conférence Internationale consacrée à Charley Patton ( 1887-1934) , à l' Université de Liège en septembre 1984

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See detailNews from Belgium
Sacré, Robert ULg

in Living BluesLetter (1983), 1(9),

Black Magic Records ( Nd) annoncent la réédition d'enregistrements inédits réalisés par Georges ADINS dans les années 60 à Chicago, etc...

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See detailNews from Belgium
Sacré, Robert ULg

in LIVING BLUESLETTER (1983), 1(2),

Projets de rééditions de la compagnie MOONSHINE RECORDS ( B)

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See detailLes News de la dentisterie conservatrice
Geerts, Sabine ULg

in Actualités Dentaires de l'Université de Liège (2008), 38

Le Filtek Silorane® (3M ESPE) et le Clearfil Majesty Posterior® (KURARAY), 2 nouveaux matériaux composites commersialisés en cette fin d'année 2007: Réelle innovation ou superbe supercherie commerciale ?

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See detailNews from outer worlds
Grodent, Denis ULg

Conference (2009, July 27)

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See detailNews on antifungal drugs registered in Belgium for the treatment of dermatophytosis in domestic carnivores.
Hamoir, J.; Goret, M.; Mignon, Bernard ULg et al

in Annales de Médecine Vétérinaire (2001), 145

This note gives a progress report on the various molecules registered in Belgium which can be used for the treatment of dermatophytosis in domestic carnivores. Its purpose is not to develop the ... [more ▼]

This note gives a progress report on the various molecules registered in Belgium which can be used for the treatment of dermatophytosis in domestic carnivores. Its purpose is not to develop the therapeutic protocols used in this type of diseases but rather to describe these compounds according to their pharmacological and toxicological characteristics as well as to define their status in the current legal framework. [less ▲]

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See detailNewsletter N° 3 - DACEFI
Meunier, Quentin ULg; Moumbogou, Carl; Ndoutoume, C. et al

E-print/Working paper (2011)

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See detailNewsletter n° 5 - DACEFI 2
Meunier, Quentin; Moumbogou, Carl; Angwé, A. et al

E-print/Working paper (2012)

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See detailNewsletter n°1 - DACEFI
Meunier, Quentin; Vermeulen, Cédric ULg

E-print/Working paper (2011)

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See detailNewsletter N°2-DACEFI
Meunier, Quentin; Grégoire, Bruno; Moumbogou, Carl et al

E-print/Working paper (2011)

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See detailNewsletter n°4 - DACEFI
Meunier, Quentin; Moumbogou, Carl; Ibinga, S. et al

E-print/Working paper (2011)

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See detailNewsletter n°6 - DACEFI
Meunier, Quentin; Moumbogou, Carl; Morin, Amélie et al

E-print/Working paper (2012)

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See detailNewt decline in Western Europe: highlights from relative distribution changes within guilds
Denoël, Mathieu ULg

in Biodiversity & Conservation (2012), 21(11), 2887-2898

The recent increase in the number of monitoring schemes has formed the basis for high quality distribution atlases. This provides the opportunity of estimating global and specific decline patterns across ... [more ▼]

The recent increase in the number of monitoring schemes has formed the basis for high quality distribution atlases. This provides the opportunity of estimating global and specific decline patterns across regional and national borders. In this framework, this study focused on four sympatric newt species—including the great crested newt (Triturus cristatus), an Annex 2 European Habitats Directive species, over six geographic areas (five countries) in Western Europe. A relative comparison of distribution maps across time is used here and is based on more than twelve thousands occupied grid cells. It benefits from the definition of a guild, as these species are simultaneously detectable in wetlands. T. cristatus and the alpine newt (Mesotriton alpestris) were the most and the least threatened newt species, respectively, whereas the palmate (Lissotriton helveticus) and smooth newt (Lissotriton vulgaris) had an intermediate decline level at both coarse and fine grain resolutions. However, regional variations across Europe and scale effects were also found. On one hand, these results show that T. cristatus is not only regionally threatened but suffers from a global decline in Western Europe. On another hand, the results indicate that patterns of decline are not uniform within Europe and that species often considered as common and not threatened are, in fact, declining more than others. Finally, the proposed methodology, i.e. using guilds to assess relative decline, would be useful as a complement to other standardized methods in correctly advising conservation managers and policy makers, particularly for species with more subtle declines. [less ▲]

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See detailNewt life after fish introduction: extirpation of paedomorphosis in a mountain fish lake and newt use of satellite pools
Denoël, Mathieu ULg; Scime, Patrick; Zambelli, Nicola

in Current Zoology (in press), 62

Fish introduction is one of the main causes of amphibian decline worldwide. It affects particularly rare aquatic phenotypes such as paedomorphs, which retain gills during the adult stage. In this context ... [more ▼]

Fish introduction is one of the main causes of amphibian decline worldwide. It affects particularly rare aquatic phenotypes such as paedomorphs, which retain gills during the adult stage. In this context, we determined whether small wetlands, such as pools surrounding fished and fishless lakes, could sustain paedomorphic and metamorphic newts. To this end, we surveyed lakes known historically to sustain Alpine newts (Ichthyosaura alpestris) as well as 35 nearby pools. On the basis of the published records, the only known population exhibiting paedomorphosis in the Swiss Alps was found to be extirpated by salmonid introductions. However, the metamorphs persisted in peripheral pools, paedomorphosis was discovered at a new locality, and overwintering larvae were still present in one of the lakes. These results show the importance of conserving varied aquatic habitats such as pools in mountainous environments where the main resources can become unsuitable for amphibians because of fish introductions. Pools may also function as reservoirs in maintaining newt populations until programs to remove fish from lakes can be carried out. It is not known if paedomorphs could reappear after fish removal. However, the combined resilience of amphibians after fish removal and the genetic basis for paedomorphosis highlighted in other taxa by previous studies suggest that there is the potential to maintain this intraspecific case of diversity even after its disappearance. [less ▲]

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See detailNewton, précurseur de l'analyse non standard
Bair, Jacques ULg; Henry, Valérie

in Tangente (2010), 137

En analysant un extrait des travaux de Newton, nous montrons que ce dernier avait une conception pratique du concept d'infiniment petit en comparant divers angles de contact.

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See detailNext-generation phase-mask coronagraphy for extrasolar planetary system imaging
Mawet, D.; Riaud, Pierre ULg; Surdej, Jean ULg

Conference (2006, March 16)

Detailed reference viewed: 5 (1 ULg)