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Peer Reviewed
See detailConcentration of Polybrominated Diphenyl Ethers (PBDEs) in House Hold Dust – Inhalation a Potential Route of Human Exposure.
sjodin; Papke; Mc Gahee et al

Poster (2004, June)

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See detailConcentration of Polybrominated Diphenyl Ethers (PBDEs) in Household Dust from Various Countries Is Dust a Major Source of Human Exposure?
Sjödin, Andreas; Päpke, Olaf; Focant, Jean-François ULg et al

in Organohalogen Compounds (2006), 68

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See detailConcentration of polybrominated diphenyl ethers (PBDEs) in household dust from various countries.
Sjodin, Andreas; Papke, Olaf; McGahee, Ernest et al

in Chemosphere (2008), 73(1 Suppl), 131-6

Seven polybrominated diphenyl ether (PBDE) congeners were measured in the particulate fraction (<2mm) of household dust samples (n=40), collected in four different countries (Australia, Germany, Great ... [more ▼]

Seven polybrominated diphenyl ether (PBDE) congeners were measured in the particulate fraction (<2mm) of household dust samples (n=40), collected in four different countries (Australia, Germany, Great Britain, and United States). Dust samples from Germany contained the lowest concentrations of total PBDEs (median: 74 ng/g, range: 17-550 ng/g dust). Australian dust contained the second lowest concentration (median: 1200 ng/g, range: 500-13,000 ng/g dust). The dust from the United States and Great Britain contained the highest measured amounts of total PBDEs (US median: 4200 ng/g dust, range: 520-29,000 ng/g; Great Britain median: 10,000 ng/g, range: 950-54,000 ng/g). Daily intake of PBDEs has been estimated from published reference values on daily dust intake rates. The highest daily intake of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) found was in the United States (<1-330 ng/day) and the lowest was in Germany (<1-2 ng/day). The PBDE congeners present in commercially available pentabromodiphenyl ether were the highest in concentration in the United States, and the congener distribution was similar to that of the technical preparation (i.e., 2,2',4,4',5-pentabromodiphenyl ether [BDE-99] was similar in concentration to that of BDE-47). We conclude that further studies are required to investigate human indoor exposure to PBDEs across countries and to determine the risk factors related to indoor design factors. [less ▲]

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See detailConcentration résidentielle et participation des populations d'origine immigrée en Europe
Martiniello, Marco ULg

in Malet, P.; Simon, P. (Eds.) Les territoires de l'intégration (1997)

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See detailConcentration, Activity and Biochemical Characterization of Myeloperoxidase in Fresh and Post-thaw equine semen and their Implication on Freezability
Ponthier, Jérôme ULg; Franck, Thierry ULg; Parrilla Hernandez, Sonia ULg et al

in Reproduction in Domestic Animals (in press)

Myeloperoxidase (MPO) is a pro-oxidant enzyme associated with decreased motility in thawed equine semen. This study aimed to describe MPO concentration, activity and subunits in raw and thawed semen and ... [more ▼]

Myeloperoxidase (MPO) is a pro-oxidant enzyme associated with decreased motility in thawed equine semen. This study aimed to describe MPO concentration, activity and subunits in raw and thawed semen and to correlate these data with motilities in raw and thawed semen. Semen samples from five stallions were collected four times. Motilities were assessed in raw and thawed semen. MPO assays were performed in raw seminal plasma, raw sperm-rich pellet and thawed semen. Total and active MPO concentrations were, respectively, assayed by enzyme-linked immunosorbent assay and specific immunological extraction followed by enzymatic detection. MPO subunits present in semen were characterized by Western 3 blot. Purified active MPO was added in PBS and freezing extender to control its activity during freezing procedure. Differences between medians were determined using Kruskal– Wallis test, and correlations were determined using Spearman’s test for nonparametric data. Active MPO concentration was low in seminal plasma and thawed semen, but high in pellet (p = 0.0058), as the opposite relation was observed for total MPO concentration (p < 0.0001). In seminal plasma and post- thaw semen, inactive 86-kDa MPO precursor was mainly observed. Purified MPO activity was decreased in the extender (p = 0.0286). MPO activity in pellet was highly correlated with thawed progressive motility (r = 􏰑0.5576, p = 0.0086). Inac- tive MPO precursor and unknown low molecular weight inactive MPO precursor subunits explain low MPO activity in semen. Major MPO activity was observed in pellet, and post- thaw loss of activity is partially explained by MPO inactiva- tion in extender. Thawed semen motility was negatively correlated with MPO activity in pellet, becoming a potential freezability predictor. [less ▲]

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See detailConcentrations en mercure total (T-Hg) dans plusieurs échantillons de thons vendus dans les commerces belges Etude préliminaire réalisée pour la RTBF (Question à la Une)
Das, Krishna ULg

Report (2008)

L’objectif de cette étude préliminaire était d’analyser le mercure total (T-Hg) dans onze échantillons de thons vendus dans différents commerces belges. Les concentrations en mercure total analysées dans ... [more ▼]

L’objectif de cette étude préliminaire était d’analyser le mercure total (T-Hg) dans onze échantillons de thons vendus dans différents commerces belges. Les concentrations en mercure total analysées dans cette étude ont été comparées à celles précédemment décrites dans la littérature et aux différentes normes alimentaires en vigueur (CE, WHO et autres normes américaines ou japonaises). [less ▲]

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See detailConcentrations of ammonia, carbon dioxide and bacteria in breeding pig houses
Nicks, Baudouin ULg; Dechamps, P.; Canart, Bernard et al

in Proceedings of the 11th Congress of the International Pig Veterinary Society (1990)

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See detailConcentrations of chlorinated and brominated contaminants and their metabolites in serum of harbour seals and harbour porpoises
Weijs, Liesbeth; Das, Krishna ULg; Siebert, Ursula et al

in Environment International (2009), 35(6), 842-850

Harbour seals (Phoca vitulina) and harbour porpoises (Phocoena phocoena) are top predators in the North Sea and consequently accumulate a variety of pollutants in their tissues. Concentrations of ... [more ▼]

Harbour seals (Phoca vitulina) and harbour porpoises (Phocoena phocoena) are top predators in the North Sea and consequently accumulate a variety of pollutants in their tissues. Concentrations of polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and their hydroxylated metabolites (HO-PCBs and HO-PBDEs) were measured in serum of wild harbour seals (n=47) and captive harbour porpoises (n=21). Both species exhibit long life spans and do not have extreme situations, such as complete fasting during periods of lactation, in their annual cycles. For PCBs, concentrations in adult males were slightly higher than in juveniles and lowest in juvenile females. For PBDEs, juveniles have higher levels than adult males and females, probably as a consequence of lactational transfer. However. differences between these age-gender groups were not statistical significant, indicating that individual variation was limited within each species, even without knowing the feeding status of the animals. Body condition. particularly emaciation, has a major influence on the levels of chlorinated and brominated contaminants in serum. Profiles of PCBs were CB 153>CB 138>CB 187>CB 180 and CB 153>CB 138>CB 149>CB 187>CB 180 for harbour seals and porpoises respectively. For PBDEs, BDE 47 was the predominant congener followed by BDE 100 and 99 in both species. In harbour seals, concentrations of sum PCBs (median: 39,200 pg/ml) were more than 200 times higher than levels of sum PBDEs (median: 130 pg/ml) and almost 10 times higher than concentrations of sum HO-PCBs (4350 pg/ml). In harbour porpoises, concentrations of sum PCBs (median: 24,300 pg/ml) were about 20 times higher than concentrations of PBDEs (median: 1300 pg/ml). HO-PCBs were detected in only 4 harbour porpoises and this at very low concentrations. Naturally-produced MeO-PBDEs were only found in harbour porpoises at concentrations ranging from 120 to 810 pg/ml. HO-PBDEs were not found in any species. In general, harbour seals accumulate less compounds and have mostly lower concentrations than harbour porpoises possibly as a result of a better developed metabolism. (C) 2009 Elsevier Ltd. All rights reserved. [less ▲]

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See detailConcentrations of organobrominated compounds of natural and industrial origin in top predators from Brazilian waters
Dorneles, Paulo; Lailson-Brito, José; Covaci, Adrian et al

in Organohalogen Compounds (2008), 70

The main objective of the present study was to determine the current concentrations of organobrominated compounds in odontocete species from a highly industrialized and urbanized region in the Southern ... [more ▼]

The main objective of the present study was to determine the current concentrations of organobrominated compounds in odontocete species from a highly industrialized and urbanized region in the Southern Hemisphere. [less ▲]

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See detailConcentrations of pepsinogens A and C in peripheral blood of cattle at different developmental stages.
Melo de Sousa, Noelita ULg; Michiels, Jean-Albert ULg; Terroni, D. et al

in Proceedings of the 6th European Congress of Bovine Health and Management (ECBHM) (2011, September 07)

Measurements of global proteolytic activity of pepsinogens are successfully used for diagnosis of gastric nematode parasitism in cattle. Higher pepsinogen concentrations detected in peripheral circulation ... [more ▼]

Measurements of global proteolytic activity of pepsinogens are successfully used for diagnosis of gastric nematode parasitism in cattle. Higher pepsinogen concentrations detected in peripheral circulation were found to be associated with damage in gastric mucosa The aim of the present study was to investigate the ontogenesis of PgnA and PgnC in cattle. Bovine PgnA and PgnC were isolated in our laboratory. Both antigens were labeled to 125I by using chloramine T method. Standard curves ranged from 125 to 1.0 ng/mL. Antisera were raised in rabbits: AS866 (anti-PgnA) and AS869 (anti-PgnC). The optimal dilutions for primary antisera were 1:15,000 and 1:20,000 for AS866 and AS869, respectively. In order to establish the ontogenesis of both PgnA and PgnC, samples were collected from 50 bovine fetuses (3rd to the 9th month), 18 calves and 57 adult cattle. Mean(±SEM) concentrations of PgnA were 4.6±0.7 ng/mL, 78.9±6.7 ng/mL and 133.2±17.6 ng/mL in fetuses, calves and mature cows, respectively. Concentrations of PgnC were <0.9 ng/mL, 13.5±1.1 ng/ml and 201.5±26.5 ng/ml in fetuses, calves and mature cows, respectively. The ratio PgnA/PgnC concentrations decrease from fetal age (maximal ratio due to undetectable PgnC concentrations), being 5.8 in young calves and lowest (0.7) in mature cows. In conclusion, PgnA and PgnC concentrations can be distinctly measured by specific RIA systems. Ratio PgnA/PgnC concentrations can be useful to better understand the ontogenesis of gastric aspartic proteinases in cattle. It is expected that clinical application of these assays will help vet practitioners to establish diagnosis of gastric nematode parasitism in dairy and beef herds taking into account the age of the animal. [less ▲]

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See detailConcentrations of pregnancy-associated glycoproteins in Water buffaloes females (Bubalus bubalis) during pregnancy and postpartum periods
Barbato, O.; Melo de Sousa, Noelita ULg; Malfatti, A. et al

in O’Leary, M.; Arnett, J. (Eds.) Pregnancy Protein Research (2009)

The concentrations of pregnancy-associated glycoproteins (PAG) were determined in buffalo cows (Bubalus bubalis) using three different radioimmunoassay (RIA) systems (RIA-497, RIA-706, and RIA-708 ... [more ▼]

The concentrations of pregnancy-associated glycoproteins (PAG) were determined in buffalo cows (Bubalus bubalis) using three different radioimmunoassay (RIA) systems (RIA-497, RIA-706, and RIA-708). Samples (10 mL) were collected by jugular venipuncture from Week 0 until Week 28 of pregnancy (9 females), and from parturition until Week 10 postpartum (13 females). During pregnancy, PAG molecules were detectable at Week 6 using the three aforementioned RIA systems (3.9 ± 1.3 ng/mL, 9.7 ± 1.3 ng/mL, and 9.9 ± 0.7 ng/mL for RIA-497, RIA-706, and RIA-708, respectively). These concentrations increased gradually until Week 28, reaching values of 39.6 ± 4.0 ng/mL (RIA-497), 50.5 ± 11.9 ng/mL (RIA-706), and 68.2 ± 20.8 ng/mL (RIA-708). PAG concentrations determined by RIA-497, RIA-706, and RIA-708 were strongly correlated throughout the entire gestation period, RIA-708 giving the higher concentrations. At parturition, the mean concentrations ranged from 34.9 ± 4.0 (RIA-497) to 84.7 ± 10.6 ng/mL (RIA-708). Thereafter, the concentrations decreased steadily, reaching very low levels (< 1.0 ng/mL) at Week 8 postpartum. In conclusion, PAG concentrations measured by the above three RIA systems showed a profile similar to those previously described in bovine species, with higher concentrations being detected by RIA-706 and RIA-708. However, the patterns of PAG concentrations, studied using the three aforementioned PAG-RIA systems, differed around parturition, with very low levels being observed in the female buffaloes [less ▲]

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See detailConcentrations plasmatiques de la vitamine K1 et de l'acenocoumarol en fonction du temps de quick (I.N.R.)
Gougnard, Thierry; Charlier, Corinne ULg; David, Jean-Louis ULg et al

in Acta Clinica Belgica. Supplementum (1999), S1

Reduced vitamins K are acting as cofactors of glutamic carboxylation of procoagulant factors (II, VII, IX and X). The reduction of these vitamins is inhibited by oral anticoagulants. The response to ... [more ▼]

Reduced vitamins K are acting as cofactors of glutamic carboxylation of procoagulant factors (II, VII, IX and X). The reduction of these vitamins is inhibited by oral anticoagulants. The response to antivitamins K is individual and may change during the treatment of a patient. The determinations of plasmatic vitamin K and acenocoumarol may help to explain the mechanism of a resistance to the anticoagulant therapy. Quantifications of vitamin K1 are realized after liquid-liquid extraction with liquid chromatography and fluorescence detection after post-column reduction. For acenocoumarol, plasma concentration is measured, after liquid-liquid extraction, by liquid chromatograph, with ion trap mass spectrometer detector. [less ▲]

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See detailLe concept biopsychosocial du processus du stress, in stress et cardiologie
Triffaux, Jean-Marc ULg; Fontaine, Ovide ULg; Kulbertus, Henri ULg et al

in Fontaine, Ovide (Ed.) le concept biopsychosocial du processus du stress, in stress et cardiologie (1996)

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See detailConcept commun et concept analogique de compromis : ‘‘un air de famille’’
Nachi, Mohamed ULg

in SociologieS (2010)

Compromise as a commonsense concept and as an analogical concept: “family likenesses”. A practical epistemological reflection Should we consider the concept of compromise only in the presence of partners ... [more ▼]

Compromise as a commonsense concept and as an analogical concept: “family likenesses”. A practical epistemological reflection Should we consider the concept of compromise only in the presence of partners willing to negotiate and who both accept to make concessions in order to arrive at some form of agreement? Is it appropriate to talk of compromise when facing abstract entities or categories of opposing ideas? This article explores what would be necessary in order to be able to establish a link between commonsense compromise and analogical compromise, the two accepted meanings of the concept. Its ambition is to construct two operational concepts capable of rendering intelligible the multiple realities of compromise. Starting from the lexical field of the term compromise, an operational theoretical concept is constructed. The compromise is considered from its commonsense perspective and from its varied uses in relation to its different contexts in order to determine its principal specific characteristics. Finally, the concept of grammar is used for identifying what is shared by the two concepts and for establishing the foundations of a reflection on the issue of the social construction of compromise [less ▲]

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See detailLe concept d’Ecart comme mesure de la qualité de vie infantile : validation de l’Inventaire Systémique de Qualité de Vie pour Enfants
Missotten, Pierre ULg

Master of advanced studies dissertation (2008)

Purpose: The objective of this paper was to determine the interest and psychometric properties of a new QOL self-assessment questionnaire suitable for children 8 to 12 years old measuring alpha, beta and ... [more ▼]

Purpose: The objective of this paper was to determine the interest and psychometric properties of a new QOL self-assessment questionnaire suitable for children 8 to 12 years old measuring alpha, beta and gamma changes: the “Inventaire Systémique de Qualité de vie pour Enfants” (ISQV-E©). Methods: This was a cross-sectional validation study. 288 children have completed the ISQV-E. Other tools were used: The “Autoquestionnaire de Qualité de Vie Enfants Imagé” (AUQUEI), the State-Trait Anxiety Inventory for Children (STAIC), the Children’s Depression Inventory (CDI) and socio-demographic data. Results: The internal consistency of the four scores of the ISQV-E (state, goal, rank and gap) is satisfactory. All scores have their own specificity. The data show the convergent validity, sensitivity and applicability of the ISQV-E. On the other hand, no satisfactory factorial structure was found although a multidimensional theoretical perspective was applied. Conclusions: The feasibility of the ISQV-E seems clearly demonstrated and the value of this new tool seems evident in contexts of physical, psychological or social problems. The validation study was promising but certain points such as test-retest reliability remain to be studied and the others, such as the absence of a satisfactory factorial structure, need to be examined again. [less ▲]

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See detailLe concept d'éco-zoning en région wallonne de Belgique
Bory, Alexandra ULg; Brévers, Florence ULg; Dopagne, Claude ULg et al

Report (2011)

La nécessité d’évoluer vers des zones d’activité économique plus durables sous-tend cette recherche exploratoire autour du concept d’éco-zoning. Des investigations menées dans la littérature spécialisée ... [more ▼]

La nécessité d’évoluer vers des zones d’activité économique plus durables sous-tend cette recherche exploratoire autour du concept d’éco-zoning. Des investigations menées dans la littérature spécialisée, un recueil d’expériences et des entretiens avec des parties prenantes permettent de proposer une définition de référence qui s’articule sur le principe de la mise en oeuvre coordonnée de trois approches : l’aménagement et l’urbanisme, le management environnemental et l’écologie industrielle. Une proposition de grille d’évaluation des réalisations est formulée autour de critères d’encadrement et de performances. [less ▲]

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See detailConcept d'équilibre agonistes / antagonistes de l'épaule
Forthomme, Bénédicte ULg; Crielaard, Jean-Michel ULg; Croisier, Jean-Louis ULg

in Croisier, Jean-Louis; Codine, Philippe (Eds.) Exercice musculaire excentrique (2009)

Besides the concentric classical ratios, the eccentric isokinetic assessment of the muscle shoulder allows us to build some specific ratios. The mixed ratio combines the eccentric maximal contraction of ... [more ▼]

Besides the concentric classical ratios, the eccentric isokinetic assessment of the muscle shoulder allows us to build some specific ratios. The mixed ratio combines the eccentric maximal contraction of the external rotators (ER) and the concentric maximal strength of the internal rotators (IR). The mixed ratio is frequently decreased among overhead athletes. This imbalance could rise to shoulder tendinopathy, but seemed to be linked with field performance. The functional ratio corresponds to the balance between the ER in concentric mode and the IR in eccentric contraction. The unstable shoulder shows a trend to lower functional ratios, highlighting the weakness of the eccentric IR in that pathology. [less ▲]

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See detailLe concept d'équivalence des normes, une réponse à la mondialisation des marchés de capitaux
Olivier, Henri ULg

in De Wulf, Hans; Steenot, Reinhard; Tison, Michel (Eds.) et al Van Alle Markten - Liber Amicorum Eddy Wymeersch (2008)

In this paper we discuss the criteria for recognition of foreign GAAPs applied by issuers of European Regulated Capital Markets. We also discuss the conditions to recognise inspections of audit firms ... [more ▼]

In this paper we discuss the criteria for recognition of foreign GAAPs applied by issuers of European Regulated Capital Markets. We also discuss the conditions to recognise inspections of audit firms auditing issuers on a EU Regulated Market carried out by foreign oversight authorities. We conclude that the concept of mutual recognition applied in the European Union differs from equivalence (or full reliance) applied in the US but in both cases it seems difficult to avoid the additional condition of convergence of standards. [less ▲]

Detailed reference viewed: 108 (7 ULg)