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See detailNo performance reduction at the present northern edge of Ambrosia artemisiifolia L. invasion range
Ortmans, William ULg

Conference (2014, May 05)

Plant populations at range edges may exhibit reduction of performances and fitness. In the case of biological invasions, such a reduction could be associated with a slowing down of the spread and explain ... [more ▼]

Plant populations at range edges may exhibit reduction of performances and fitness. In the case of biological invasions, such a reduction could be associated with a slowing down of the spread and explain the non-naturalization of a species outside its present invasion range. Common ragweed (Ambrosia artemisiifolia L.) is an ideal model to investigate such processes, since it is invasive in France but not naturalized in northern countries, such as Belgium and the Netherlands. In this study, we test if the performances of ragweed populations vary among different invasion zones. Three populations were selected in each of four invasion zones in Western Europe: 1) French invasion area; 2) northern and 3) southern invasion edges; and 4) outside the invasion area (Belgium and Netherlands). Field performances (growth, reproduction, stress resistance) were recorded on 25 plants per population. Furthermore, the competition by the native flora was assessed around each plant. Generalized Linear Models were used to compare performance among invasion zones and populations, with competition as covariate. Regressions were also performed to assess the influence of climatic data on population performances. No evidence of decreasing performances was found at the edges of the invasion area, neither outside of it, suggesting that the invasion front has the potential to keep going northwards. Competition by native flora had a significant impact on stress resistance, but did not decrease reproduction or growth. These results are discussed in the light of other ongoing experiments in Belgium. [less ▲]

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See detailNo serologic evidence for emerging Schmallenberg virus infection in dogs (Canis domesticus)
Garigliany, Mutien-Marie ULg; Desmecht, Daniel ULg; Bayrou, Calixte ULg et al

in Vector Borne & Zoonotic Diseases (2013), 13(11), 1-4

Schmallenberg virus, a novel orthobunyavirus, is spreading among ruminants, especially sheep and cattle throughout Europe. To determine the risk for domestic dog infection, we conducted a survey among ... [more ▼]

Schmallenberg virus, a novel orthobunyavirus, is spreading among ruminants, especially sheep and cattle throughout Europe. To determine the risk for domestic dog infection, we conducted a survey among cases referred to the university Companion Animal Clinic to assess possible seroconversion. No evidence of transmission to dogs was detected. [less ▲]

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See detailNo significant effect of an "atraumatic" needle on incidence of post-lumbar puncture headache or traumatic tap.
Lenaerts, M.; Pepin, J. L.; Tombu, S. et al

in Cephalalgia : An International Journal of Headache (1993), 13(4), 296-7

We compared the incidence of post-lumbar puncture headache and of red blood cells in the first CSF sample (traumatic tap) in 35 inpatients punctured with a standard 20 G Yale needle and in 26 patients ... [more ▼]

We compared the incidence of post-lumbar puncture headache and of red blood cells in the first CSF sample (traumatic tap) in 35 inpatients punctured with a standard 20 G Yale needle and in 26 patients punctured with Sprotte's "atraumatic" needle. No significant difference was found between the two groups in incidence of headache or in frequency of traumatic taps. [less ▲]

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See detailNo simian Plasmodium detected in populations living in the equatorial rainy forest of the Democratic Republic of Congo
Mvumbi makaba, Dieudonné; Bobanga Lengu, Thierry; Kayembe Ntumba, Jean-Marie et al

Poster (2014, April 03)

Background Malaria remains the most deadly parasitic disease to date, especially in sub-Saharan Africa, which comprises the majority of cases collected per year. It has long been accepted that four ... [more ▼]

Background Malaria remains the most deadly parasitic disease to date, especially in sub-Saharan Africa, which comprises the majority of cases collected per year. It has long been accepted that four species of Plasmodium (P. falciparum, P. vivax, P. malariae and P. ovale) were responsible for the disease in humans. But quite recently, a fifth species, Plasmodium Knowlesi, has been identified as naturally infecting humans. Indeed, known for decades as naturally parasitizing the monkey Macaca fascicularis, P. knowlesi has long been confused, in terms of its evolutionary stage, with P. malariae or P. falciparum, which it resembles morphologically and it was not possible to properly differentiate them until the advent of molecular biology. To date, P. Knowlesi has only been identified in Southeast Asia and a similar phenomenon of natural transmission of simian plasmodium to humans has not been reported elsewhere. We therefore conducted this study to investigate the possible transmission of simian plasmodium to humans in populations living near the rainforest of the Democratic Republic of Congo (DRC) where several species of primates lives. Methods & Materials Three villages (Wenji-Secli, Bongonde, and Bolenge) in the Province of Ecuador (North-eastern DRC) were selected because of their geographical location. Blood samples spotted on filter paper were collected from 100 people randomly taken in each village. Two successive RT- PCR were performed. A first one using a single probe able to diagnose all plasmodium spp. and a second using four species-specific probes for the diagnosis of the four conventional human plasmodium species. Positivity in the first RT- PCR with negativity in the second RT- PCR would suggest the presence of plasmodium species other than the four conventional. Results P. falciparum was correctly identified in 44.6 % of samples. No other species of human plasmodium or not has been identified. Conclusion This preliminary study did not detect the presence of simian plasmodium in human populations living in the rainforest of the DRC. Studies with larger samples and with more advanced techniques should still be conducted. Keywords: Malaria, simian plasmodium, DR Congo [less ▲]

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See detailThe NO Venus nightglow: SPICAV observations and implications on transport in the lower thermosphere
Gérard, Jean-Claude ULg; Cox, Cédric ULg; Bertaux, J.-L.

Conference (2010, June 22)

A new set of 725 NO limb profiles has been analyzed. The profiles have been deconvolved and inverted to get volume emission rates. Updates mean VER peak altitude is 115 km, in excellent agreement with PV ... [more ▼]

A new set of 725 NO limb profiles has been analyzed. The profiles have been deconvolved and inverted to get volume emission rates. Updates mean VER peak altitude is 115 km, in excellent agreement with PV results obtained 30 years ago. The corresponding average vertical intensity is 1.2 kR. The altitude of emission occurs at a higher altitude near the bright spot region than at larger distances (by about 7 km). The location of the statistical bright spot is the same as observed with PV (that is shifted dawnward by 2 hrs and slightly south of AS point). The nightside mean vertical intensity is between 0.4 and 1.8 kR, which brackets the values derived from the limb profiles. These results, coupled with other airglow measurements, provide constraints on global atmospheric circulation and vertical transport [less ▲]

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See detailNO-CARRIER-ADDED (NCA) ARYL [F-18] FLUORIDES VIA THE NUCLEOPHILIC AROMATIC-SUBSTITUTION OF ELECTRON-RICH AROMATIC RINGS
DING, Y. S.; SHIUE, C. Y.; FOWLER, J. S. et al

in Journal of Fluorine Chemistry (1990), 48(2), 189-205

Nucleophilic aromatic substitution by [18F]fluoride ion has been demonstrated on rings containing electron donating groups in addition to the necessary electron withdrawing and leaving groups.

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See detailNo-carrier-added aryl [18F]fluorides via the nucleophilic aromatic substitution of electron rich aromatic rings.
Ding, Y.-S.; Shiue, C.-Y.; Fowler, J. S. et al

in Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine (1989), 30

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See detailNo-carrier-added asymmetric synthesis of alpha-methyl-alpha-amino acids labelled with fluorine-18
Damhaut, Philippe; Lemaire, Christian ULg; Plenevaux, Alain ULg et al

in Tetrahedron (1997), 53(16), 5785-5796

Various [18F]fluoro aromatic α-methyl-L-amino acids 11 have been synthesized with high enantiomeric purity (ee > 97%). These new radiopharmaceuticals for Positron Emission Tomography (PET), potential ... [more ▼]

Various [18F]fluoro aromatic α-methyl-L-amino acids 11 have been synthesized with high enantiomeric purity (ee > 97%). These new radiopharmaceuticals for Positron Emission Tomography (PET), potential inhibitors of enzymatic functions, were regiospecifically labelled by nucleophilic substitution on trimethylammoniumbenzaldehyde triflate precursors 9. The [18F]fluoro aromatic aldehydes 12 obtained were easily converted to the corresponding [18F]fluorobenzyl halides [13 (X = 1)]. After alkylation of the lithium enolate of (2S,5S)-l-tert-Boc-2-tert-butyl-3,5-dimethyl-imidazolidin-4-one 2, the adducts were cleaved to give, after HPLC purification, various [18F]fluoro-α-methyl amino acid analogs with radiochemical yields of 10% (End of Bombardment, EOB) after a synthesis time of 120 min. The corresponding [19F]fluorinated amino acids 4 and [19F]fluoro intermediates were also prepared. [less ▲]

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See detailNo-carrier-added regioselective preparation of 6-[18F]fluoro-L-dopa
Lemaire, Christian ULg; Guillaume, Marcel ULg; Cantineau, Robert et al

in Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine (1990), 31(7), 1247-1251

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See detailNo-Carrier-Added Regioselective Preparation of 6-[18f]Fluoro-L-Dopa
Bozet, Claire ULg; Guillaume, Marcel; Cantineau, R. et al

in Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine (1990), 31(7), 1247-51

This paper describes the preparation of 6-[18F]fluoro-L-dopa by a no-carrier-added method based on the nucleophilic displacement of nitro groups of two commercially available substrates, 3,4-dimethoxy-2 ... [more ▼]

This paper describes the preparation of 6-[18F]fluoro-L-dopa by a no-carrier-added method based on the nucleophilic displacement of nitro groups of two commercially available substrates, 3,4-dimethoxy-2-nitrobenzaldehyde (nitroveratraldehyde) and 6-nitropiperonal. Fluorination was conducted in DMSO with fluorine-18 (18F) in the presence of the aminopolyether Kryptofix 222 and potassium carbonate. The condensation of the fluorinated aldehydes with phenyloxazolone and the subsequent hydrolysis with HI/P yield, after purification by HPLC, only the 6-(D, L) isomers. The racemic mixture (50/50) was resolved on an analytical scale chiral column. The method, which requires 100 min (EOB) to complete, produces 6-[18F]fluoro-L-dopa with a decay-corrected radiochemical yield of 10%, an enantiomeric purity greater than 99%, and a specific activity of 1.2 Ci/mumole. [less ▲]

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See detailNO2 and CO interaction with plasma treated Au-decorated MWCNTs: Detection pathways
Leghrib, R.; Llobet, E.; Felten, A. et al

in Procedia Chemistry (2009), 1(1), 931-934

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See detailNoam Chomsky, De quoi les médias dominants tirent-ils leur domination ?
Durand, Pascal ULg

in Durand, Pascal (Ed.) Médias et Censure. Figures de l'orthodoxie (2004)

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See detailNoble, chevalier, pénitent, martyr : l'idéal de sainteté d'après une Vita mosane du XIIe siècle
George, Philippe ULg

in Moyen Age (Le) (1983), LXXXIX

Un nouvel idéal, l'idéal du chevalier chrétien, est mis en exergue dans une Vie latine mosane du XIIe siècle

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See detailNoblesse éclairée, bourgeoisie tendre dans la principauté de Liège au XVIIIe siècle
Droixhe, Daniel ULg

in Etudes sur le XVIIIe siècle (1982), 9

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See detailLa noblesse en milieu urbain dans l’espace mosan (XIIIe-XVe siècles)
Marchandisse, Alain ULg

in Dutour, Thierry (Ed.) Les Nobles et la ville dans l’espace francophone (XIIe-XVIe siècles) (2010)

Detailed reference viewed: 19 (1 ULg)
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See detailNoblesse féodale et pouvoir épiscopal dans la principauté de Liège des XIIIe-XVe siècles
Marchandisse, Alain ULg

in Gentile, Marco; Savy, Pierre (Eds.) Noblesse et États princiers en Italie et en France au XVe siècle (2009)

Detailed reference viewed: 11 (5 ULg)