References of "2004"
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See detailVariability of the gas transfer velocity of CO2 in a macrotidal estuary (The Scheldt)
Borges, Alberto ULg; Vandenborght, Jean-Pierre; Schiettecatte, Laure-Sophie et al

in Estuaries (2004), 27(4), 593-603

We report a large set of 295 interfacial carbon dioxide (CO2) flux measurements obtained in the Scheldt estuary in November 2002 and April 2003, using the floating chamber method. From concomitant ... [more ▼]

We report a large set of 295 interfacial carbon dioxide (CO2) flux measurements obtained in the Scheldt estuary in November 2002 and April 2003, using the floating chamber method. From concomitant measurements of the air-water CO2 gradient, we computed the gas transfer velocity of CO2. The gas transfer velocity is well correlated to wind speed and a simple linear regression function gives the most consistent fit to the data. Based on water current measurements, we estimated the contribution of water current induced turbulence to the gas transfer velocity, using the conceptual relationship of O’Connor and Dobbins (1958). This allowed us to construct an empirical relationship to compute the gas transfer velocity of CO2 that accounts for the contribution of wind and water current. Based on this relationship, the spatial and temporal variability of the gas transfer velocity in the Scheldt estuary was investigated.Water currents contribute significantly to the gas transfer velocity, but the spatial and temporal variability (from daily to seasonal scales) is mainly related to wind speed variability. [less ▲]

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See detailMicrowear and Residue Analysis in Perspective: the contribution of ethnoarchaeological evidence
Rots, Veerle ULg; Williamson, Bonny

in Journal of Archaeological Science (2004), 31

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See detailUne visite insolite au Parc National Henri Pittier (Vénézuela)
Vermeulen, Cédric ULg; Balsacq, R.

in Parcs & Réserves (2004), 59(3), 24-27

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See detailModulation of the HSV-TK/ganciclovir bystander effect by n-butyrate in glioblastoma: correlation with gap-junction intercellular communication.
Robe, Pierre ULg; Jolois, Olivier ULg; Nguyen Khac, Minh-Tuan ULg et al

in International Journal of Oncology (2004), 25(1), 187-92

The efficacy of HSV-TK/ganciclovir gene therapy largely relies on the bystander effect, i.e. the ability of transfected cells to kill the adjacent, untrasfected cells. This mechanism itself depends ... [more ▼]

The efficacy of HSV-TK/ganciclovir gene therapy largely relies on the bystander effect, i.e. the ability of transfected cells to kill the adjacent, untrasfected cells. This mechanism itself depends chiefly on the transfer via gap junctions of phosphorylated ganciclovir between cells, and is often deficient in glioblastomas. In this report, we demonstrate that n-butyrate markedly enhances the gap junction intercellular communication of GJIC-deficient glioma cells, and significantly increases the bystander effect in such cells. This effect of n-butyrate appears to be independent from its HDAC inhibitory effect, since trichostatin A does not reproduce it. [less ▲]

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See detailData reconciliation and sampling protocol design, case of a paper deinking process
Brown, David; Marechal, François; Heyen, Georges ULg et al

in Paperi Ja Puu-Paper and Timber (2004), 86(8), 565-570

An equation solver data reconciliation software has been used to build a validated model of a waste paper deinking mill, by combining control room measurements and process design specifications. An ... [more ▼]

An equation solver data reconciliation software has been used to build a validated model of a waste paper deinking mill, by combining control room measurements and process design specifications. An optimal sampling protocol to validate the model by using only control room measurements has been determined by identifying, with genetic algorithm programming, the additional sampling points and corresponding sensors required to compensate for the lack of redundant measurements. [less ▲]

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See detailPerho Irmeli, Catalogue of Arabic Manuscripts. Codices Arabici Arthur Christenseniani
Bauden, Frédéric ULg

in Bulletin Critique des Annales Islamologiques (2004), 20

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See detailFiscal policy in an ovrelapping generations model with bequest-as-consumption
Michel, Philippe; Pestieau, Pierre ULg

in Journal of Public Economic Theory (2004)

This paper analyzes an overlapping generation (OLG) growth model wherein saving finances second period consumption and bequest-as-consumption. First, it looks at the market equilibrium and at the optimal ... [more ▼]

This paper analyzes an overlapping generation (OLG) growth model wherein saving finances second period consumption and bequest-as-consumption. First, it looks at the market equilibrium and at the optimal solution; then it turns to the issue of decentralizing the optimal solution with various taxes and transfers. Depending on the available instruments, either a first-best or a second-best optimum can be achieved. Throughout the paper, the results are contrasted with those obtained in the standard OLG model without intergenerationel transfers. [less ▲]

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See detailBistability analyses of a caspase activation model for receptor-induced apoptosis
Eissing, Thomas; Conzelmann, Holger; Gilles, Ernst Dieter et al

in Journal of Biological Chemistry (2004), 279(35), 36892-36897

Apoptosis is an important physiological process crucially involved in development and homeostasis of multicellular organisms. Although the major signaling pathways have been unraveled, a detailed ... [more ▼]

Apoptosis is an important physiological process crucially involved in development and homeostasis of multicellular organisms. Although the major signaling pathways have been unraveled, a detailed mechanistic understanding of the complex underlying network remains elusive. We have translated here the current knowledge of the molecular mechanisms of the death-receptor-activated caspase cascade into a mathematical model. A reduction down to the apoptotic core machinery enables the application of analytical mathematical methods to evaluate the system behavior within a wide range of parameters. Using parameter values from the literature, the model reveals an unstable status of survival indicating the need for further control. Based on recent publications we tested one additional regulatory mechanism at the level of initiator caspase activation and demonstrated that the resulting system displays desired characteristics such as bistability. In addition, the results from our model studies allowed us to reconcile the fast kinetics of caspase 3 activation observed at the single cell level with the much slower kinetics found at the level of a cell population. [less ▲]

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See detailSite Index Curves For Alnus Glutinosa (L.) Gaertn. In Southern Belgium: Effect Of Site On Curve Shape
Thibaut, André; Claessens, Hugues ULg; Rondeux, Jacques ULg

in Forestry (2004), 77(2), 157-171

Site index curves were developed for Alnus glutinosa (L.) Gaertn. in southern Belgium. Five models of Duplat and Tran-Ha were fitted to a data set of 15 stem analyses divided into two data subsets clearly ... [more ▼]

Site index curves were developed for Alnus glutinosa (L.) Gaertn. in southern Belgium. Five models of Duplat and Tran-Ha were fitted to a data set of 15 stem analyses divided into two data subsets clearly characterized by different height growth patterns. Model III was found to fit data sets best, both separately and combined. Various statistical comparisons made between the two curve sets underline shape variations corresponding to different soil conditions. A comparison between Belgian and other European curves highlights the effect of the soil on growth curve shape, which is at least as important as that of climatic factors. However, for practical reasons, the use of a general global model, which does not specifically take into account differences in height growth patterns, is satisfactory for productivity evaluation and is recommended for forest management. [less ▲]

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See detailHow dangerous is the environment for the breast?
Charlier, Corinne ULg

Conference (2004)

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See detailThe contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains
Mathieu, Jean-Philippe; Cano, I. G.; Koutzarova, T. et al

in Superconductor Science and Technology (2004), 17(1), 169-174

Hardness and fracture toughness of Dy-123 single domains were studied by Vickers in micro-indentation. A significant anisotropy of the mechanical properties was observed. Hardness tests give higher values ... [more ▼]

Hardness and fracture toughness of Dy-123 single domains were studied by Vickers in micro-indentation. A significant anisotropy of the mechanical properties was observed. Hardness tests give higher values when performed in (001) planes rather than in planes parallel to the c-axis. Moreover, the cracks pattern around the indentation follows preferential orientation in planes parallel to the c-axis whereas a classical 'four-cracks' pattern is observed in the (001) planes. It has been possible to show the crucial role played by the 211 particles in the deviating mechanism of cracks and the relevance of the high homogeneity of 211-particle distribution in the material. [less ▲]

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See detailQuel traitement pour les vascularites ANCA-positives ?
Delanaye, Pierre ULg; Bataille, Yoann ULg; Krzesinski, Jean-Marie ULg

in Médecine et Hygiène (2004), 62

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See detailEstimation du débit de filtration glomérulaire chez le patient obèse.
Rorive, Marcelle ULg; Saint-Remy, Annie ULg; Delanaye, Pierre ULg et al

in Néphrologie (2004), 24(5), 28

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See detailConservation management for Orthoptera in the Dadia reserve, Greece
Kati, V.; Dufrêne, Marc ULg; Legakis, A. et al

in Biological Conservation (2004), 115(1), 33-44

The diversity patterns, the ecological structure and the typical species of the orthopteran assemblage in the Dadia reserve are investigated. The reserve was designed to protect the black vulture ... [more ▼]

The diversity patterns, the ecological structure and the typical species of the orthopteran assemblage in the Dadia reserve are investigated. The reserve was designed to protect the black vulture (Aegypius monachus) and other raptors. A total of 39 orthopteran species were found, including Paranocarodes chopardi, a pamphagid species with very restricted distribution. All species can be represented in a network of six complementary habitats, including open oak woodlands, agricultural fields separated with hedges, humid grasslands, as well as serpentine grasslands. The buffer zone of the reserve is far more important for Orthoptera conservation than the core areas, which host most of the black vulture nests. Management focusing on raptors is in general compatible with conservation of Orthoptera. We suggest the maintenance of forest openings in the buffer zone, the maintenance of forest heterogeneity, the enhancement of periodical livestock grazing, and the use of nine indicator species and Paranocarodes chopardi in the reserve monitoring program. © 2003 Elsevier Ltd. All rights reserved. [less ▲]

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See detailThe influence of temperature on bacterial assemblages during bioremediation of a diesel fuel contaminated subAntarctic soil
Delille, Daniel; Pelletier, E.; Coulon, F. et al

Conference (2004)

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See detailEtablissement d'utilité publique et fondation privée
Thirion, Nicolas ULg

in A.S.B.L., fondations et associations internationales (2004)

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See detailCarbon dynamics and CO2 air-sea exchanges in the eutrophicated coastal waters of the Southern Bight of the North Sea: a modelling study
Gypens, N.; Lancelot, Christiane; Borges, Alberto ULg

in Biogeosciences (2004), 1(2), 147-157

A description of the carbonate system has been incorporated in the MIRO biogeochemical model to investigate the contribution of diatom and Phaeocystis blooms to the seasonal dynamics of air-sea CO2 ... [more ▼]

A description of the carbonate system has been incorporated in the MIRO biogeochemical model to investigate the contribution of diatom and Phaeocystis blooms to the seasonal dynamics of air-sea CO2 exchanges in the Eastern Channel and Southern Bight of the North Sea, with focus on the eutrophied Belgian coastal waters. For this application, the model was implemented in a simplified three-box representation of the hydrodynamics with the open ocean boundary box ‘Western English Channel’ (WCH) and the ‘French Coastal Zone’ (FCZ) and ‘Belgian Coastal Zone’ (BCZ) boxes receiving carbon and nutrients from the rivers Seine and Scheldt, respectively. Results were obtained by running the model for the 1996–1999 period. The simulated partial pressures of CO2 (pCO2) were successfully compared with data recorded over the same period in the central BCZ at station 330 (51 26.050 N; 002 48.500 E). Budget calculations based on model simulations of carbon flow rates indicated for BCZ a low annual sink of atmospheric CO2 (−0.17 mol C m−2 y−1). On the opposite, surface water pCO2 in WCH was estimated to be at annual equilibrium with respect to atmospheric CO2. The relative contribution of biological, chemical and physical processes to the modelled seasonal variability of pCO2 in BCZ was further explored by running model scenarios with separate closures of biological activities and/or river inputs of carbon. The suppression of biological processes reversed direction of the CO2 flux in BCZ that became, on an annual scale, a significant source for atmospheric CO2 (+0.53mol C m−2 y−1). Overall biological activity had a stronger influence on the modelled seasonal cycle of pCO2 than temperature. Especially Phaeocystis colonies which growth in spring were associated with an important sink of atmospheric CO2 that counteracted the temperature-driven increase of pCO2 at this period of the year. However, river inputs of organic and inorganic carbon were shown to increase the surface water pCO2 and hence the emission of CO2 to the atmosphere. Same calculations conducted in WCH, showed that temperature was the main factor controlling the seasonal pCO2 cycle in these open ocean waters. The effect of interannual variations of fresh water discharge (and related nutrient and carbon inputs), temperature and wind speed was further explored by running scenarios with forcing typical of two contrasted years (1996 and 1999). Based on these simulations, the model predicts significant variations in the intensity and direction of the annual air-sea CO2 flux. [less ▲]

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