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See detailA New Route for the Synthesis of [18f]Fluoroaromatic Substituted Amino Acids: No Carrier Added L-P-[18f]Fluorophenylalanine
Lemaire, Christian ULg; Guillaume, M.; Christiaens, Léon ULg et al

in International Journal of Radiation Applications and Instrumentation. Part A : Applied Radiation and Isotopes (1987), 38(12), 1033-8

L-p-[18F]fluorophenylalanine was designed as a potential marker for probing protein synthesis in the human brain by positron emission tomography. This radiotracer has been synthesized using nucleophilic ... [more ▼]

L-p-[18F]fluorophenylalanine was designed as a potential marker for probing protein synthesis in the human brain by positron emission tomography. This radiotracer has been synthesized using nucleophilic displacement of the activated nitro group of p-nitrobenzaldehyde by NCA 18F- obtained from the 18O (p, n) reaction on enriched water. The L-form of the [18F]fluoroamino acid can be separated on an analytical scale chiral column. A typical production run of 22.2 GBq (600 mCi) of 18F obtained after a 10 microA.h bombardment of 18 MeV protons on 99.8% 18O-enriched water leads to a batch of 1.11 GBq (30 mCi) of NCA L-p-[18F]fluorophenylalanine after a total synthesis time of 120 min. [less ▲]

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See detailNew Rules, New Political Class? Analysis of the Impact of the Electoral Reforms in Belgium on the 2014 Elections and Aftermath
Dodeigne, Jérémy ULg; Vandeleene, Audrey

Conference (2013, October 18)

At the eve of the 2014 “mammoth elections”, the Belgian electoral systems are in question. According to the eight parties having contributed to the sixth State reform, it is time for a “political renewal” ... [more ▼]

At the eve of the 2014 “mammoth elections”, the Belgian electoral systems are in question. According to the eight parties having contributed to the sixth State reform, it is time for a “political renewal”. The agreement of October 2011 plans that the Senate will cease to be a permanent institution composed of directly elected senators. The latter will be instead replaced by regional MPs with dual offices. The agreement also provides the (principle of) vertical simultaneity between the regional, federal and European elections while it bans dual candidature and forces candidates to seat where they get elected. In the meantime, the Walloon Parliament has adopted the “anti-cumul” Decree, which limits the accumulation of local and parliamentary offices. This research note proposes therefore a global reflexion on the potential consequences resulting from these electoral reforms on the Belgian political class. We proceed in two steps. First, we detail which reforms could affect the political class. Second, we seek to evaluate which impact the reforms may have on the political class. We argue that the electoral reforms adopted for the 6th State reforms but also by the Walloon Parliament confirm and furthermore enhance an already pre-existing trend towards a territorial distinctiveness between the federal and the regional levels. The 2014 elections might become one of the key points of crystallization when political actors become aware of the existence of two distinct political arenas. Overall, the article anticipates the reshaping of Belgian politics in the run-up to 2014 and aftermath. [less ▲]

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See detailNew ruthenium catalysts bearing N-heterocyclic carbene ligands for ATRA and ATRP
Sauvage, Xavier ULg; Richel, Aurore ULg; Delfosse, Sébastien et al

in e-polymers (2003)

This study provides a glimpse of the synthetic possibilities arising from the use of NHC􀀀 s complexes in radical reactions, and illustrates how the fine tuning of the steric and electronic parameters of ... [more ▼]

This study provides a glimpse of the synthetic possibilities arising from the use of NHC􀀀 s complexes in radical reactions, and illustrates how the fine tuning of the steric and electronic parameters of this class of ruthenium complexes affect their catalytic activity. [less ▲]

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See detailNew ruthenium catalysts bearing N-heterocyclic carbene ligands for ATRP
Tudose, Adriana; Delfosse, Sébastien; Richel, Aurore ULg et al

in e-polymers (2003)

New ruthenium catalysts bearing N-heterocyclic carbene ligands in Kharasch chemistry

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See detailNew ruthenium catalysts bearing N-heterocyclic carbene ligands for ATRP
Sauvage, Xavier ULg; Richel, Aurore ULg; Delfosse, Sébastien et al

Poster (2003, May)

Stable nucleophilic N-heterocyclic carbenes (NHCs) are neutral, two-electron ligands with a negligible p-back-bonding tendency. They behave as phosphine mimics, yet they are better s- donors and they form ... [more ▼]

Stable nucleophilic N-heterocyclic carbenes (NHCs) are neutral, two-electron ligands with a negligible p-back-bonding tendency. They behave as phosphine mimics, yet they are better s- donors and they form stronger bonds to metal centers than most phosphines. Their electronic and steric properties are liable to ample modification simply by varying the substituents on the nitrogen atoms. Therefore, NHCs constitute a promising new class of ligands available for catalyst engineering and fine-tuning. We found that the 18-electron complex RuCl2(p-cymene)(PCy3) was a versatile and efficient promoter for ring-opening metathesis polymerization of both strained and low-strain cyclic olefins when activated by a suitable precursor such as trimethylsilyldiazomethane. This complex was also an excellent catalyst for ATRP (Atom Transfer Radical Polymerization) of MMA and styrene. In this poster, we present preliminary results obtained in olefin metathesis and in radical reactions (ATRP and Kharasch addition) when tricyclohexylphosphine was substituted by an N-heterocylic carbene ligand. [less ▲]

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See detailNew ruthenium catalysts bearing N-heterocyclic carbene ligands in Kharasch chemistry
Tudose, Adriana; Delfosse, Sébastien; Richel, Aurore ULg et al

Poster (2003)

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See detailThe "New Science" and the Sea - Academies, Learned Societies and Marine Knowledge in the Seventeenth and Eighteenth Centuries
Vandersmissen, Jan ULg

Conference (2012, July 05)

Academies and learned societies were the main tools for the application of the “new science” in the seventeenth and eighteenth centuries. This paper aims to contribute to the research on marine science ... [more ▼]

Academies and learned societies were the main tools for the application of the “new science” in the seventeenth and eighteenth centuries. This paper aims to contribute to the research on marine science, nautical knowledge and empire building by studying academies and learned societies in their role of bureaus of investigation of the colonial reality. As a fact, institutions such as the Académie Royale des Sciences in Paris and the Royal Society of London played an important role as mediators in the development of various models of “science policies”. This paper focuses on the implication of these institutions in overseas scientific exploration in the seventeenth and eighteenth centuries. It stresses the specific importance of “academic” voyages for the development of navigational techniques, from Huygens and Hooke to Maskelyne and Harrison. This comparative study thus tries to show how through these new centers of knowledge production a scholarly interest for day-to-day nautical practices influenced the scientized perfection of navigational techniques. [less ▲]

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See detailA new seismic analysis of Alpha Centauri
Thoul, Anne ULg; Scuflaire, Richard ULg; Noels-Grötsch, Arlette ULg et al

in Astronomy and Astrophysics (2003), 402(1), 293-297

Models of alpha Cen A & B have been computed using the masses determined by Pourbaix et al. (\cite{Po2002}) and the data derived from the spectroscopic analysis of Neuforge & Magain (\cite{Ne1997}). The ... [more ▼]

Models of alpha Cen A & B have been computed using the masses determined by Pourbaix et al. (\cite{Po2002}) and the data derived from the spectroscopic analysis of Neuforge & Magain (\cite{Ne1997}). The seismological data obtained by Bouchy & Carrier (\cite{Bo2001}, \cite{Bo2002}) do help improve our knowledge of the evolutionary status of the system. All the constraints are satisfied with a model which gives an age of about 6 Gyr for the binary. [less ▲]

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See detailA new semi-selective agar medium for recovery and enumeration of antagonistic yeast, Pichia guilliermondii strain Z1 from orange fruit surface
Lahlali, Rachid; Hamadi, Younes; El Guilli, Mohamed et al

in African Journal of Microbiology Research [=AJMR] (2013), 7(25), 3209-3216

The aim of this work was to develop a semi-selective medium for recovery and enumeration of Pichia guilliermondii strain Z1, a reliable biocontrol agent against postharvest pathogens of citrus fruit, and ... [more ▼]

The aim of this work was to develop a semi-selective medium for recovery and enumeration of Pichia guilliermondii strain Z1, a reliable biocontrol agent against postharvest pathogens of citrus fruit, and to assess the population dynamic of this antagonistic yeast on orange fruit in relation to incubation temperature and time of incubation. PDA is the basal medium used in this study which allows the antagonistic strain Z1 source of carbon and nutrients. Different chemicals (thiophanate-methyl, thiabendazole, thiram and imazalil) and antibiotics (hygromycin, tetracyclin, ampicillin and chloramphenicol) have been tested individually and based on the plating efficiency up to 90%, 40 combinations have been assayed between antibiotics and fungicides. Ten combinations proved to be highly selective against citrus pathogens and laboratory microflora, but only one consisting of tetracyclin (1 g/L) and thiabendazole (60 mg/L) was retained based on plating efficiency up to 99%, total selectivity against laboratory microflora, epiphytic microflora from washed orange fruit and lower cost. The semi-selective medium TET-TBZ-PDA has been used to assess the impact of temperature and incubation time on the survival of strain Z1. It appears that population density was significantly influenced by both factors and the highest population size was recorded at 25°C followed by 5 and 35°C, respectively. This strain required a time of adaptation before entering the exponential growth phase with a maximum growth observed at 25°C relative to others. The semi-selective medium TETTBZ- PDA could be an efficient and valuable way to track the population density of this strain on the surface of orange when applied pre-or postharvest. This semi-selective medium may also aid in reaching a population density allowing a better efficiency in relation to environmental conditions. [less ▲]

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See detailA New Separable Approximation Scheme for Topological Problems and Optimization Problems Characterized by a Large Number of Design Variables
Duysinx, Pierre ULg; Zhang, Weihong; Fleury, Claude ULg et al

in Olhoff, Niels; Rozvany, Georges I.N. (Eds.) Proceedings of the First World Congress of Structural and Multidisciplinary Optimization (WCSMO1) (1995, May)

This paper is dedicated to a new convex separable approximation for solving optimization problems characterized by a very large number of design variables as in topology design. For such problems, the ... [more ▼]

This paper is dedicated to a new convex separable approximation for solving optimization problems characterized by a very large number of design variables as in topology design. For such problems, the convergence speed can be accelerated if one uses high quality approximation schemes for structural responses. To achieve this task, we propose, here, a new approximation procedure that belongs to the GMMA family. The originality of this new scheme is to rely on an automatic selection procedure of the asymptotes, using only first and zero order information accumulated during the previous iterations. This is possible owing to a diagonal Quasi-Newton update technique. Firstly, the new approximation procedure is validated on classical "benchmarks" of structural optimization. Then, it is compared to other schemes on a typical topology optimization problem. [less ▲]

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See detailNew serological markers in inflammatory bowel disease are associated with complicated disease behavior
Ferrante, M.; Henckaerts, L.; Joossens, M. et al

in Gut (2007), 56(10), 1394-1403

OBJECTIVE: The human androgen receptor (AR) contains a polyglutamine and a polyglycine stretch which are highly polymorphic and are coded respectively by a CAG and GGN repeat in exon 1 of the AR gene ... [more ▼]

OBJECTIVE: The human androgen receptor (AR) contains a polyglutamine and a polyglycine stretch which are highly polymorphic and are coded respectively by a CAG and GGN repeat in exon 1 of the AR gene. Although the in vitro studies indicated a possible effect of the GGN repeat polymorphism on the AR gene transcription and clinical observations suggest that it might modulate the androgen action, its functional significance remains unclear. We wanted to assess whether the GGN repeat affects the serum testosterone levels in healthy men, which is the expected outcome through feedback regulation if it influences androgen action as has been shown to be the case for the CAG repeat. DESIGN AND PATIENTS: A population based cross-sectional cohort study including 1476 healthy young, middle-aged, and elderly men. MEASUREMENT: Testosterone and LH levels were determined by immunoassay; free testosterone (FT) levels were calculated. Genotyping of the GGN repeat was performed using the sequencing technique. RESULTS: The GGN repeat number was significantly associated with circulating testosterone and FT levels (P=0.017 and P=0.013 respectively). However, taking into account that age, body mass index, and CAG are already in the regression model, the GGN repeat could explain only a small part of the variation of both testosterone and FT. CONCLUSION: To our knowledge, this study is the first to demonstrate a significant positive association between the GGN repeat and androgen levels in a large cohort of healthy men. Although the present study thus adds credence to the view that the polyglycine tract in the AR can modulate AR action, this effect appears to be only small so that its clinical relevance remains questionable. [less ▲]

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See detailNew serum biochemical markers (Coll 2-1 and Coll 2-1 NO2) for studying oxidative-related type II collagen network degradation in patients with osteoarthritis and rheumatoid arthritis
Deberg, Michelle ULg; Labasse, Alain ULg; Christgau, S. et al

in Osteoarthritis and Cartilage (2005), 13(3), 258-265

Objective: Protein nitration is a prominent feature of inflammatory processes in the joint. We have developed immunoassays specific for a peptide of the alpha-helical region of type II collagen (108 ... [more ▼]

Objective: Protein nitration is a prominent feature of inflammatory processes in the joint. We have developed immunoassays specific for a peptide of the alpha-helical region of type II collagen (108)HRGYPGLDG(116) (Coll 2-1) and its nitrated form (108)HRGY(NO2)PGLDG(116) (Coll 2-1 NO2) in biological fluids. Design: Coll 2-1 and Coll 2-1 NO2 peptides were injected into rabbits. Two antisera (D3 and D37) were selected for their specificity and affinity and used to develop specific immunoassays. Coll 2-1 and Coll 2-1 NO2 were measured in sera of 242 healthy subjects (N), 67 patients with primary knee osteoarthritis (OA) and 19 patients with rheumatoid arthritis (RA). Results: In healthy subjects, Coll 2-1 and Coll 2-1 NO2 concentrations were 125.13 +/- 3.71 nM and 0.16 +/- 0.08 nM, respectively. In OA and RA, Coll 2-1 and Coll 2-1 NO2 serum levels were found to be significantly increased compared to controls of the same range of age (Coll 2-1: OA: 200.80 +/- 8.98 nM, RA: 172.30 +/- 19.05 nM, normal: 126.60 +/- 6.70 nM and Coll 2-1 NO2: OA: 0.26 +/- 0.02, RA: 0.38 +/- 0.05, normal: 0.12 +/- 0.01 nM). Coll 2-1 NO2 levels were significantly more elevated in RA than in OA patients (P < 0.05). As a consequence, the ratio Coll 2-1 NO2/Coll 2-1 was 1.6 times higher in RA than in OA subjects. No relationship was found between the radiological OA severity and the levels of Coll 2-1 and Coll 2-1 NO2 in serum. Coll 2-1 NO2, but not Coll 2-1, was correlated with C-reactive protein in the sera of OA and RA patients. Conclusions: The determination of both Coll 2-1 and Coll 2-1 NO2 in serum of arthritic patients seems to be a promising useful tool for the detection of oxidative-related cartilage degradation episode. Further, these markers could be helpful for monitoring the effects of anti-inflammatory or antioxidant drugs on cartilage degradation. (c) 2004 OsteoArthritis Research Society International. Published by Elsevier Ltd. All rights reserved. [less ▲]

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See detailNew service development in high tech sectors: A decision making perspective
Van Riel, Allard ULg; Lievens, Annouk

in International Journal of Service Industry Management (2004), 15(1), 72-101

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See detailA New Shift-Share Method
Artige, Lionel ULg; Van Neuss, Leif ULg

in Growth and Change (in press)

Shift-share analysis is a decomposition technique widely used in regional studies to quantify an industry-mix effect and a competitive effect on the growth of regional employment (or any other relevant ... [more ▼]

Shift-share analysis is a decomposition technique widely used in regional studies to quantify an industry-mix effect and a competitive effect on the growth of regional employment (or any other relevant variable) relative to the national average. This technique has always been subject to criticism for its lack of theoretical basis. This paper presents a critical assessment of the methods suggested by Dunn (1960) and by Esteban-Marquillas (1972) and proposes a new shift-share method, which separates out the two effects unambiguously. By way of illustration, we provide an application to manufacturing employment in the Belgian provinces between 1995 and 2007. [less ▲]

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See detailA New Shift-Share Method
Artige, Lionel ULg; Van Neuss, Leif ULg

E-print/Working paper (2012)

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See detailNew silica based polymeric systems designed for the solid-liquid extraction of uranyl ions
Caprasse, F.; Leroy, Delphine ULg; Martinot, Lucien et al

in Journal of Materials Chemistry (2002), 12(1), 137-142

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See detailNew silicone based antifoam for fermentation
Etoc, Ariane; Delvigne, Frank ULg; Lecomte, Jean-Paul et al

Conference (2006, April 30)

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See detailA NEW SIMPLIFIED ANALYTICAL DESIGN METHOD FOR STEEL AND COMPOSITE SWAY FRAMES
Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

in Journal of Constructional Steel Research (2013)

Eurocode 4 is the European design code for composite construction; in its so-called EN 1994-1-1 version, the design of “non-sway buildings” is mainly covered. As a result, EC4 focuses on the check of ... [more ▼]

Eurocode 4 is the European design code for composite construction; in its so-called EN 1994-1-1 version, the design of “non-sway buildings” is mainly covered. As a result, EC4 focuses on the check of structural elements like beams, columns, slabs and joints. However, in the last years, the construction of taller buildings and larger industrial halls without wind bracing systems tends to make global instability a relevant failure mode, which is not well covered by Eurocode 4. Recently, intensive experimental, numerical and theoretical investigations have been carried out at Liège University. The latter aimed at improving the knowledge in the field of sway composite building frames and at developing appropriate design rules. The rotational behavior of the beam-to-column composite joints is one of the key aspects of the problem to which a special attention has been paid. This paper reflects investigations carried out at Liège University on this topic. In particular, an innovative simplified analytical method to predict the ultimate loading factor and the associated collapse mode of both steel and composite frames subjected to static loadings is presented. [less ▲]

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See detailNew simplified analytical method for the prediction of global stability of composite sway frames
Ly, Dong Phuong Lam ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

in EUROSTEEL 2008, 5th European Conference on Steel and Composite Structures (2008, September)

In the last years, the construction of taller composite buildings and larger composite industrial halls without wind bracing systems is susceptible to make global instability a relevant failure mode. This ... [more ▼]

In the last years, the construction of taller composite buildings and larger composite industrial halls without wind bracing systems is susceptible to make global instability a relevant failure mode. This one is not yet covered by EC4 [2]. This paper reflects investigations carried out of Liege University on this topic. In particular, an innovative simplified analytical method to predict the ultimate loading factor and the associated collapse mode of composite frames is derived. [less ▲]

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