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See detailIsotopic constraints on the genesis of the anorthosite suite of rocks
Demaiffe, Daniel; Weis, Dominique; Michot, Jean et al

in Chemical Geology (1986), 57

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See detailIsotopic ratios and elemental contents as indicators of seagrass C processing and sewage influence in a tropical macrotidal ecosystem (Madagascar, Mozambic channel)
Lepoint, Gilles ULg; Frederich, Bruno ULg; Gobert, Sylvie ULg et al

in Scientia Marina (2008), 72(1), 109-117

Isotopic ratios and elemental concentrations of carbon and nitrogen were measured in seven seagrass species colonising different tidal flats near Toliara (SW Madagascar) in order to determine the ... [more ▼]

Isotopic ratios and elemental concentrations of carbon and nitrogen were measured in seven seagrass species colonising different tidal flats near Toliara (SW Madagascar) in order to determine the potential use of these parameters for assessing C processing and sewage use by tropical seagrasses. Nitrogen concentrations measured in upper intertidal seagrasses near Toliara were almost twice those measured on the tidal flat near a healthy mangrove situated 20 km away from Toliara town. At Toliara Beach, δ15N values were correlated with the N concentrations of Halodule sp., one of the dominant species on the tidal flat. This correlation did not exist for Halophila ovalis, the other dominant species. An increase in N concentrations and δ15N values demonstrates the influence of sewage coming directly onto Toliara Beach on the N cycles of intertidal seagrasses. Nevertheless, this influence seems restricted to the upper littoral zone and was not the main cause of seagrass die-off. On the other hand, at the mangrove site, δ15N values were not correlated with the N concentrations of Halodule sp. or Thalassia hemprichii, showing that natural δ15N variability is driven by other factors than the δ15N of N sources. Moreover, inter-individual variability of δ15N values was greater than inter-specific or inter-site variability, making the δ15N difficult to interpret in the context of human-disturbance influence on the N cycle of tropical seagrasses. δ13C values were close to -9‰, indicating the use of HCO 3– as an inorganic carbon source by the seven investigated species. Contrary to our hypothesis, variation between sites and location on the tidal flat was limited, suggesting limited impact on δ13C values of sewage, emersion duration and mechanisms for HCO 3– incorporation. [less ▲]

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See detailIsotopic Ratios in Comets: Status and Perspectives
Jehin, Emmanuel ULg; Manfroid, Jean ULg; Hutsemekers, Damien ULg et al

in Earth, Moon, and Planets (2009), 105

Isotopic abundance ratios are excellently suited to probe the origin of solar system matter. We review the recent measurements of the isotopic ratios of the light elements (D/H, [SUP]12[/SUP]C/[SUP]13 ... [more ▼]

Isotopic abundance ratios are excellently suited to probe the origin of solar system matter. We review the recent measurements of the isotopic ratios of the light elements (D/H, [SUP]12[/SUP]C/[SUP]13[/SUP]C, [SUP]16[/SUP]O/[SUP]18[/SUP]O, [SUP]14[/SUP]N/[SUP]15[/SUP]N, [SUP]32[/SUP]S/[SUP]34[/SUP]S) in cometary dust and gas and discuss briefly their implications. Special emphasis will be put on the determinations and progress performed in the field over the past years thanks to high resolution spectroscopy of cometary comae obtained with the ESO Very Large Telescope. Future perspectives from space missions and ground-based observations with new large and extremely large telescopes operating in the optical, infrared and submillimeter wavelengths will be presented. [less ▲]

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See detailIsotopic tracing of sediment components that are assimilated by epibiontic juveniles of Holothuria scabra (Holothuroidea)
Plotieau, Thomas; Lepoint, Gilles ULg; Lavitra, Thiery et al

in Journal of the Marine Biological Association of the United Kingdom (in press)

Despite H. scabra’s wide distribution and status as one of the best candidates for sustaining the development of tropical sea cucumber aquaculture, very few data are available regarding the organic ... [more ▼]

Despite H. scabra’s wide distribution and status as one of the best candidates for sustaining the development of tropical sea cucumber aquaculture, very few data are available regarding the organic fraction it assimilates in practice. In this study we report experimental results where H. scabra’s diet was supplemented with various 15N-labelled organic fractions of sediment. We used juveniles weighing between 38- 88 mg at the beginning of the experiment (ca. 2 cm long and 30 days old). Their growth was measured over a four week period and their 15N composition recorded. The results showed that H. scabra juveniles assimilated all added organic components from both dissolved and particulate fractions of the sediment. Bacteria seem to be an important food source for juveniles, even more so than microphytobenthos (diatoms). [less ▲]

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See detailIsotopically labeled proteome as an internal standard for multiple reaction monitoring-based biomarker quantification.
Turtoi, Andrei ULg; Castronovo, Vincenzo ULg

in Expert Review of Proteomics (2012), 9(3), 245-8

Multiple reaction monitoring is a mass spectrometry technology used to selectively identify and quantify a known molecule in a complex mixture. The technology has gained favor in proteomic applications ... [more ▼]

Multiple reaction monitoring is a mass spectrometry technology used to selectively identify and quantify a known molecule in a complex mixture. The technology has gained favor in proteomic applications, especially for biomarker quantification in human samples. For this purpose, employment of internal standard consisting of isotopically (heavy) labeled proteins is currently considered the best way of normalizing sample preparation and correcting for different ionization efficiencies. However, synthesis of heavy-labeled proteins is considered laborious and expensive. The work outlined here presents an efficient strategy of utilizing isotope-labeled amino acids in cell culture to produce heavy-labeled proteins. These are then spiked into serum and serve as internal standards to relatively quantify a large number of target proteins. The method has been applied to quantify 72 proteins in the sera of pancreatic cancer patients with remarkable efficiency and accuracy. [less ▲]

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See detailIsotropic continuum damage/repair model for alveolar bone remodelling
Mengoni, Marlène ULg; Ponthot, Jean-Philippe ULg

in Journal of Computational & Applied Mathematics (2010), 234

Several authors have proposed mechanical models to predict long term tooth movement, considering both the tooth and its surrounding bone tissue as isotropic linear elastic materials coupled to either an ... [more ▼]

Several authors have proposed mechanical models to predict long term tooth movement, considering both the tooth and its surrounding bone tissue as isotropic linear elastic materials coupled to either an adaptative elasticity behavior or an update of the elasticity constants with density evolution. However, tooth movements obtained through orthodontic appliances result from a complex biochemical process of bone structure and density adaptation to its mechanical environment, called bone remodeling. This process is far from linear reversible elasticity. It leads to permanent deformations due to biochemical actions. The proposed biomechanical constitutive law, inspired from Doblaré and García (2002) [30], is based on a elasto-viscoplastic material coupled with Continuum isotropic Damage Mechanics (Doblaré and García (2002) [30] considered only the case of a linear elastic material coupled with damage). The considered damage variable is not actual damage of the tissue but a measure of bone density. The damage evolution law therefore implies a density evolution. It is here formulated as to be used explicitly for alveolar bone, whose remodeling cells are considered to be triggered by the pressure state applied to the bone matrix. A 2D model of a tooth submitted to a tipping movement, is presented. Results show a reliable qualitative prediction of bone density variation around a tooth submitted to orthodontic forces. [less ▲]

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See detailAn isozyme study in Bilberry (Vaccinium myrtillus ) 2. Mating system and genetic structure
Jacquemart, Anne Laure; Mahy, Grégory ULg; Raspé, Olivier et al

in Belgian Journal of Botany (1994), 127

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See detailISSD : An Interactive Software for Structural Design
Latteur, Pierre ULg; Lejeune, Marc

(1998, February)

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See detailISSD : Interactive Software for Structural Design
Latteur, Pierre ULg; Houdart, Sebastien; Rebora

Software (2009)

Detailed reference viewed: 72 (1 ULg)
See detailIssledovanie stoyanki Kulbulak v 2009 g.
Derevianko, A.P.; Kolobova, K.A.; Flas, Damien ULg et al

in Problems of archaeology, ethnography and anthropology of Siberia and adjacent territories: material of the 17th annual session of the Institute of Archaeology and Ethnography, SBRAS (2009)

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See detailIssledovanie stoyanki Kulbulak v 2010 godou
Derrevianko, A.P.; Kolobova, K.A.; Pavlenok, K.K. et al

in Problems of archaeology, ethnography and anthropology of Siberia and adjacent territories: material of the 18th annual session of the Institute of Archaeology and Ethnography, SBRAS (2010)

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See detailThe issue of third in same-sex (lesbian) parenting
Naziri, Despina ULg

Conference (2013, June 24)

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See detailIssues in FEM-based Modeling of Brain Shift in Neurosurgery
Vigneron, Lara M.; Boman, Romain ULg; Ponthot, Jean-Philippe ULg et al

in Hogge, Michel; Van Keer, R.; Noels, Ludovic (Eds.) et al Proceedings of ACOMEN’2008, Advanced Computational Methods in Engineering (2008, May)

We consider the problem of improving outcomes for neurosurgery patients by enhancing intraoperative navigation and guidance. Current navigation systems do not accurately account for intraoperative brain ... [more ▼]

We consider the problem of improving outcomes for neurosurgery patients by enhancing intraoperative navigation and guidance. Current navigation systems do not accurately account for intraoperative brain deformation. In this work, we focus on the brain shift deformation that occurs just after the opening of the skull and dura, before any cut and subsequent deformation has happened. We test several algorithms and parameters in order to evaluate their impact on the modeling of the brain shift. [less ▲]

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See detailIssues in measuring habitat fragmentation.
Bogaert, Jan ULg

Scientific conference (2000)

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See detailIssues in performing a network meta-analysis.
Senn, S; Gavini, F; Magrez, D et al

in Statistical Methods in Medical Research (2013), 22

The example of the analysis of a collection of trials in diabetes consisting of a sparsely connected network of 10 treatments is used to make some points about approaches to analysis. In particular ... [more ▼]

The example of the analysis of a collection of trials in diabetes consisting of a sparsely connected network of 10 treatments is used to make some points about approaches to analysis. In particular various graphical and tabular presentations, both of the network and of the results are provided and the connection to the literature of incomplete blocks is made. It is clear from this example that is inappropriate to treat the main effect of trial as random and the implications of this for analysis are discussed. It is also argued that the generalisation from a classic random-effect meta-analysis to one applied to a network usually involves strong assumptions about the variance components involved. Despite this, it is concluded that such an analysis can be a useful way of exploring a set of trials. [less ▲]

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See detailIssues in the design of student assessment instrument for Pisa 2000
Wu, M.; Monseur, Christian ULg

Conference (2002, August)

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See detailIssues related to protein fermentation in the intestines of pigs
Bindelle, Jérôme ULg

Scientific conference (2014, March 27)

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See detailissus de l'immigration
Vandeninden, Elise ULg

in Durand, Pascal (Ed.) Les Nouveaux mots du pouvoir. Abécédaire critique. (2007)

Detailed reference viewed: 40 (4 ULg)