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See detailBiogeographic trends in Antarctic lake communities
Gibson, John; Wilmotte, Annick ULg; Taton, Arnaud et al

in Bergstrom, Dana; Convey, Peter; Huiskes, Ad HL (Eds.) Trends in Antarctic terrestrial and limnetic ecosystems (2006)

The basic biogeographic zones proposed many years ago – the Subantarctic islands, Maritime Antarctica and Continental Antarctica – continue to hold up, though they cannot be seen as absolute dividers of ... [more ▼]

The basic biogeographic zones proposed many years ago – the Subantarctic islands, Maritime Antarctica and Continental Antarctica – continue to hold up, though they cannot be seen as absolute dividers of biodiversity. For example, subantarctic Macquarie Island appears to be biogeographically separate from the islands of the Kerguelen Province, and on the continent there are species that are present in lakes of more than one zone. Furthermore, there are numerous lake environments that have yet to be investigated, and it is probable that some of these lakes could turn up surprises that will bring into question these basic divisions. An important question to be answered is whether these biogeographic zones reflect climate attributes, or whether they were moulded long ago by barriers to dispersal. Again, our imperfect knowledge of Antarctic lacustrine biogeography means that this question cannot at present be answered. However, as discussed elsewhere in this volume (Chown and Convey), there are indications of a strong biogeographical boundary for terrestrial species between the Maritime and Continental Antarctic zones. A palaeolimnological approach will assist in answering this question: understanding how Antarctic biogeography has developed through time will provide necessary insights into current distributions. A prime example is the occurrence of the copepod Boeckella poppei in Beaver Lake. Pugh et al. (2002) initially concluded that this species was an anthropogenic introduction, then Bayly et al. (2003) provided morphological evidence for long habitation in the area of Beaver Lake. Recent palaeolimnological work has shown that the species has been present in nearby Lake Terrasovoje for at least 9000 yrs (L. Cromer, A. Bissett, J. Gibson and K. Swadling, unpublished data). Even though this lake has only existed in the Holocene, cosmogenic exposure dates in the same area of exposed rock can exceed 106 years (D. Gore and D. White, personal communication). From these observations it can be concluded that Boeckella poppei has been associated with the Beaver Lake area for at least the entire Holocene and probably well back into the Pleistocene, and that its occurrence outside its ‘preferred’ biogeographical zone (Maritime Antarctica) is not a reflection of current climate, rather of history. The majority of our knowledge regarding Antarctic lacustrine biodiversity and biogeography has come from classic taxonomic studies, where the morphology (or biochemistry for bacteria) has been of greatest importance. In many cases this has led to questionable identification, correct identification of species is paramount if the true biodiversity and biogeography of Antarctica is to be deduced. It is only in the last few years that the more objective approach of molecular genetics has been applied to Antarctic lacustrine organisms, and then only for more cryptic groups, such as bacteria and cyanobacteria. As more samples and organisms are studied by these methods it is likely that new relationships between species distributions will be found. Due to the limited number of species in Antarctica (compared to more temperate zones), it may be possible in the future to record the make-up of selected genes of most, if not all, of the biota, which will allow more precise analysis. There is increasing evidence for endemism amongst the inhabitants of lakes both on the Antarctic continent and the subantarctic islands, from bacteria to crustacea. Use of molecular genetic techniques to identify more cryptic species will most likely add to the list of putative endemics. It is clear, however, that recent colonisation and current climate also play important roles in the distribution of the biota, as most of the lakes in Antarctica are of relatively recent (Holocene) origin. Colonising species have to be adapted to transport from source areas, which can either involve inter- or intra-continental movement, as well as survival on arrival at potential habitat. Flexibility in nutritional and habitat requirements is an important factor in determining whether a species will be a successful coloniser. The buffering to environmental extremes provided by the liquid water habitat means that conditions further south will not be as harsh as those experienced by their terrestrial counterparts. As the climate changes in the future, it will be interesting to note the effects of these changes on the lacustrine biota. Will new species colonise the Antarctic Peninsula where temperatures are warming? In the longer term, the biogeography of Antarctic lakes will continue to be dynamic. New species will arrive, others will become extinct. The biogeographic zones long-proposed may continue to hold, though more precise knowledge of current distributions and responses to climate change may refine our view. [less ▲]

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See detailRelationship between haptoglobin, serum amyloid A, and clinical status in a survey of dairy herds during a 6-month period
Humblet, Marie-France ULg; Guyot, Hugues ULg; Boudry, Benjamin et al

in Veterinary Clinical Pathology (2006), 35(2), 188-193

Haptoglobin and serum amyloid A are major acute phase proteins in cattle. Dairy cattle often develop pathologic conditions in the peripartum period; acute phase proteins may be useful in their diagnosis ... [more ▼]

Haptoglobin and serum amyloid A are major acute phase proteins in cattle. Dairy cattle often develop pathologic conditions in the peripartum period; acute phase proteins may be useful in their diagnosis. Objectives: The purpose of this study was to compare the accuracy of serum haptoglobin (Hp) and serum amyloid A (SAA) concentrations with clinical health status for diagnosing disease during the peripartum period in dairy cattle. Methods: Dairy cows from 4 herds were evaluated every 15 days over a 6-month period. Health status was determined by thorough clinical examination. Haptoglobin and SAA concentrations were measured in serum using validated methods and the results were classifed as positive or negative based on defined cutoff points. Disease prevalence, sensitivity, and specificity were compared using clinical examination as the gold standard. Results: A total of 1896 samples from 158 cows were analyzed. Significant increases in mean Hp and SAA concentrations were observed in the week following parturition in both primiparous and multiparous cows, although high interindividual variability was observed. Both Hp and SAA had low sensitivity but higher specificity in determining disease status compared with clinical examination. Increased concentrations of Hp and SAAwere found in ,10% of samples from clinically healthy cows, except in the week after parturition. Conclusions: Haptoglobin and serum amyloid A should be used with caution as markers of inflammation in the week after calving. Poor sensitivity in other postpartum periods could be related to the higher incidence of chronic (vs acute) inflammation. Haptoglobin may be appropriate for routine screening, but further work needs to be done to assess its value as an indicator of herd health. [less ▲]

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See detailRitual Dynamics in Pausanias: The Laphria
Pirenne-Delforge, Vinciane ULg

in Stavrianopoulou, Eftychia (Ed.) Ritual and Communication in the Graeco-Roman World (2006)

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See detailLe nez électronique, un nouvel outil diagnostique pour les maladies respiratoires du cheval ?
Salinas, Emmanuelle; Ramery, Eve ULg; Fraipont, Audrey ULg et al

in Proceedings: AVEF, Versailles, France (2006)

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See detailA Text Mining-based Recommendation System for Customer Decision Making in Online Product Customization
Ittoo, Ashwin ULg; Zhang, Yi Yang; Jiao, Roger

in IEEE Proceedigns of International Conference on Management of Innovation and Technology (2006)

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See detailMultisegmented tangential breast fields: an effective step towards IMRT without a significantly higher secondary cancer risk
GULYBAN, Akos ULg; Kovács, Péter; Bellyei, Szabolcs et al

in Radiotherapy & Oncology (2006), 81(suppl 1), 172

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See detailStudy of precursors responsible for off-flavor formation during storage of potato flakes.
Laine, G.; Göbel, Cornelia; du Jardin, Patrick ULg et al

in Journal of Agricultural and Food Chemistry (2006), 54

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See detailModelling weathering processes at the catchment scale: The WITCH numerical model
Godderis, Y.; François, Louis ULg; Probst, A. et al

in Geochimica et Cosmochimica Acta (2006), 70(5), 1128-1147

A numerical model of chemical weathering in soil horizons and underlying bedrock (WITCH) has been coupled to a numerical model of water and carbon cycles in forest ecosystems (ASPECTS) to simulate the ... [more ▼]

A numerical model of chemical weathering in soil horizons and underlying bedrock (WITCH) has been coupled to a numerical model of water and carbon cycles in forest ecosystems (ASPECTS) to simulate the concentration of major species within the soil horizons and the stream of the Strengbach granitic watershed, located in the Vosges Mountains (France). For the first time, simulations of solute concentrations in soil layers and in the catchment river have been performed on a seasonal basis. The model is able to reproduce the concentrations of most major species within the soil horizons, as well as catching the first-order seasonal fluctuations of aqueous calcium, magnesium and silica concentrations. However, the WITCH model underestimates concentrations of Mg2+ and silica at the spring of the catchment stream, and significantly underestimates Ca2+ concentration. The deficit in calculated calcium can be compensated for by dissolution of trace apatite disseminated in the bedrock. However, the resulting increased Ca2+ release yields important smectite precipitation in the deepest model layer (in contact with the bedrock) and subsequent removal of large amount of silica and magnesium from solution. In contrast, the model accurately accounts for the concentrations of major species (Ca, Mg and silica) measured in the catchment stream when precipitation of clay minerals is not allowed. The model underestimation of Mg2+ and H4SiO4 concentrations when precipitation of well crystallized smectites is allowed strongly suggests that precipitation of well crystallized clay minerals is overestimated and that more soluble poorly crystallized and amorphous materials may be forming. In agreement with observations on other watersheds draining granitic rocks, this study indicates that highly soluble trace calcic phases control the aqueous calcium budget in the Strengbach watershed. (c) 2005 Elsevier Inc. All rights reserved. [less ▲]

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See detailLe financement par l'Etat fédéral des ministres des cultes et des délégués du Conseil central laïque. Rapport de la Commission des sages
Rigaux, Marie-François; Mortier, Freddy; Drijkoningen, Jonny et al

Report (2006)

This reports proposes an analysis of the current mechanism for recognizing and financing religious and philosophical communities in Belgium. It examines in depth all questions regarding salaries and ... [more ▼]

This reports proposes an analysis of the current mechanism for recognizing and financing religious and philosophical communities in Belgium. It examines in depth all questions regarding salaries and pensions of clerics and humanist delegates. Other apsects of the public financing of religous and phlosophical communities are also dealt with, including criteria on religious participation, religious identity and other means for "counting religions". A last part is dedicated to recommandations for reforming the current federal part of the public financing scheme. [less ▲]

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See detailMaintien dans l'emploi des travailleurs âgés : enjeux et pistes de travail pour les entreprises
Bertrand, Françoise ULg; Hansez, Isabelle ULg; Peters, Stéphanie ULg

in Médecine du Travail & Ergonomie = Arbeidsgezondheidszorg & Ergonomie (2006), 42(3), 83-89

Le taux d’emploi des travailleurs âgés de plus de 55 ans en Belgique est un des plus faibles d’Europe. Notre pays est loin d’atteindre les objectifs de taux d’emploi inscrits dans la Stratégie Européenne ... [more ▼]

Le taux d’emploi des travailleurs âgés de plus de 55 ans en Belgique est un des plus faibles d’Europe. Notre pays est loin d’atteindre les objectifs de taux d’emploi inscrits dans la Stratégie Européenne de l’Emploi. Ce constat doit donc inciter les autorités publiques, les entreprises et les travailleurs à réagir. Si les premières ont commencé à mettre en place des mesures structurelles pour remédier au problème, les entreprises et les travailleurs ne sont pas toujours conscients de la marge de manœuvre dont ils disposent pour relever le défi. Les stéréotypes des unes et une certaine culture du « droit à la retraite » des autres sont des obstacles de première ligne. C’est pourquoi il est primordial d’engager des sensibilisations à leur égard. Cet article présente les résultats d’une recherche menée auprès de travailleurs belges pour évaluer les motifs de départ, et la place des conditions de travail et du stress dans l’explication des retraits prématurés. Les résultats fournissent un matériaux solide pour orienter non seulement la sensibilisation, mais aussi les actions à mettre en place au sein des entreprises pour encourager le maintien dans l’emploi des plus âgés. On notera par exemple que la prévention doit débuter avec les travailleurs dès l’âge de 46 ans, que la lutte contre le stress lié aux conditions de travail est nécessaire mais non suffisante pour prévenir les retraits prématurés, et qu’il faut surtout se concentrer sur une meilleure gestion des changements organisationnels et la valorisation du personnel pour endiguer les départs anticipés. [less ▲]

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See detailCardiac pumping reserve measured in healthy horses using a dobutamine stress test
Sandersen, Charlotte ULg; Detilleux, Johann ULg; Art, Tatiana ULg et al

in Proceedings of the 45th Congress of the British Equine Veterinary Association (2006)

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See detailFace au chaos des arts numériques
Bawin, Julie ULg

in Flux News (trimestriel d'art contemporain) (2006), (42), 23

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See detailImpact of Mycosphaerella fijiensis toxins on banana antioxidant systems.
Busogoro, J. P.; Olivier, T.; Leiva, M. et al

Poster (2006)

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See detailLe Roman en prose de Guillaume d'Orange, t. II. Édition critique
Tyssens, Madeleine ULg; Henrard, Nadine ULg; Gemenne, Louis

Book published by Champion (2006)

Édition critique de la mise en prose romanesque d’une quinzaine des chansons de geste composant le cycle épique de Guillaume d’Orange, conservée dans deux gros volumes manuscrits. Cet important ensemble ... [more ▼]

Édition critique de la mise en prose romanesque d’une quinzaine des chansons de geste composant le cycle épique de Guillaume d’Orange, conservée dans deux gros volumes manuscrits. Cet important ensemble (plus de 1200 pages dans l’édition) fut composé à la cour de Bourgogne vers 1456 ; il n’avait jamais reçu d’édition complète. Le tome I est paru en 1999 dans la même collection. [less ▲]

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See detailDynamics of Dowstream Entry in Postal Markets
Gautier, Axel ULg

in Crew, Michael; Kleindorfer, Paul (Eds.) Liberalization of the Postal and Delivery Sector (2006)

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See detailPotential of electrical imaging to constrain saltwater intrusion models: 2D numerical simulations
Kemna, A.; Nguyen, Frédéric ULg; Antonsson, A. et al

(2006)

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See detailGlaciaçoes neodevonianas E Eocarboniferas na America do sul.
Caputo, M.V.; Streel, Maurice ULg; Melo, H.G. et al

in Simposio da Amazonias (2006)

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