References of "Demoulin, Vincent"
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See detailLyngbyapeptin A, a modified tetrapeptide from Lyngbya bouillonii (Cyanophyceae)
Didier Klein; Jean-Claude Braekman; Désiré Daloze et al

in Tetrahedron Letters (1999)

Lyngbyapeptin A 1, a novel tetrapeptide containing the rate 3-methoxy-2-butenoyl moiety was isolated from the cyanobacterium Lyngbya bouillonii, collected in Papua New Guinea. Its structure (without ... [more ▼]

Lyngbyapeptin A 1, a novel tetrapeptide containing the rate 3-methoxy-2-butenoyl moiety was isolated from the cyanobacterium Lyngbya bouillonii, collected in Papua New Guinea. Its structure (without stereochemistry) was established by mass spectral- and two-dimensional NMR studies. [less ▲]

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See detailOverexpression, purification and characterization of Mycobacterium bovis BCG alcohol dehydrogenase.
Wilkin, J. M.; Soetaert, K.; Stelandre, M. et al

in European Journal of Biochemistry (1999), 262(2), 299-307

A previous study of the effect of zinc deprivation on Mycobacterium bovis BCG pointed out the potential importance of an alcohol dehydrogenase for maintaining the hydrophobic character of the cell ... [more ▼]

A previous study of the effect of zinc deprivation on Mycobacterium bovis BCG pointed out the potential importance of an alcohol dehydrogenase for maintaining the hydrophobic character of the cell envelope. In this report, the effect of the overexpression of the M. bovis BCG alcohol dehydrogenase (ADH) in Mycobacterium smegmatis and M. bovis BCG is described. The purification of the enzyme was performed to apparent homogeneity from overexpressing M. bovis BCG cells and its kinetic parameters were determined. The enzyme showed a strong preference for both aromatic and aliphatic aldehydes while the corresponding alcohols were processed 100-1000-fold less efficiently. The best kcat/Km values were found with benzaldehyde > 3-methoxybenzaldehyde > octanal > coniferaldehyde. A phylogenetic analysis clearly revealed that the M. bovis BCG ADH together with the ADHs from Bacillus subtilis and Helicobacter pylori formed a sister group of the class C medium-chain alcohol dehydrogenases, the plant cinnamyl alcohol dehydrogenases (CADs). Comparison of the kinetic properties of our ADH with some related class C enzymes indicated that the mycobacterial enzyme substrate profile resembled that of the CADs involved in plant defence rather than those implicated in lignification. A possible role for the M. bovis BCG ADH in the biosynthesis of the lipids composing the mycobacterial cell envelope is proposed. [less ▲]

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See detailMadangolide and Laingolide A, Two Novel Macrolides from Lyngbya bouillonii (Cyanobacteria)
Klein, D.; Daloze, D.; Hoffmann, L. et al

in Journal of Natural Products (1999)

Two new macrolide derivatives, madangolide (2) and laingolide A (3), have been isolated from the cyanobacterium Lyngbya bouillonii, collected in Papua New Guinea. Their structures (without stereochemistry ... [more ▼]

Two new macrolide derivatives, madangolide (2) and laingolide A (3), have been isolated from the cyanobacterium Lyngbya bouillonii, collected in Papua New Guinea. Their structures (without stereochemistry) have been established by detailed high-field 1D and 2D NMR studies and, in the case of 3, by comparison with the spectroscopic data of laingolide (1), previously isolated from the same organism. [less ▲]

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See detailPhenologie des Basidiomycetes lignicoles de l'ile de Laing (Papouasie Nouvelle-Guinee)
Castillo Cabello, Gabriel ULg; Demoulin, Vincent ULg

in Belgian Journal of Botany (1998)

In the framework of a study of wood-inhabiting fungi on Laing Island, a small coral island located on the northern coast of Papua New Guinea, we have established a phenological table of the 96 taxa of ... [more ▼]

In the framework of a study of wood-inhabiting fungi on Laing Island, a small coral island located on the northern coast of Papua New Guinea, we have established a phenological table of the 96 taxa of encountered Basidiomycetes. Within six species presenting large phenological amplitude, two groups can be distinguished. On the one hand a group of species (Hexagonia tenuis, Polyporus philippinensis and Microporus xanthopus) with narrow ecological amplitude restricted to dense vegetation cover and thus growing in an environment buffered against desiccation and on the other hand a group of species (Pycnoporus sanguineus, Schizophyllum commune and Trametes scabrosa) with a very large ecological amplitude very resistant to desiccation. Furthermore, a large number of species are found too sporadically in order to draw some conclusions concerning their phenology. [less ▲]

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See detailNaCl salinity and temperature effects on growth of three wood-rotting basidiomycetes from a Papua New Guinea coastal forest
Castillo Cabello, Gabriel ULg; Demoulin, Vincent ULg

in Mycological Research (1997)

The growth of three wood inhabiting basidiomycetes (Microporus xanthopus, Pycnoporus sanguineus and Schizophyllum commune) isolated from a tropical coastal forest of Papua New Guinea is characterized in ... [more ▼]

The growth of three wood inhabiting basidiomycetes (Microporus xanthopus, Pycnoporus sanguineus and Schizophyllum commune) isolated from a tropical coastal forest of Papua New Guinea is characterized in relation to temperature and NaCl salinity. P. sanguineus and M. xanthopus present a very similar response to NaCl salinity, but P. sanguineus has a wider tolerance for temperature variations. S. commune withstands wide temperature variations, but it is the only one to present a marked salt resistance. This correlates with its abundance along the sea. The presence of P. sanguineus in the same habitat is rather unexpected since it is very sensitive to NaCl salinity. Its high growth rate probably allows it to take advantage of periods of high rains that limit salt accumulation. [less ▲]

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See detailCaractérisation métabolique cérébrale et neuropsychologique des syndromes parkinsoniens
Salmon, Eric ULg; Van der Linden, Martial ULg; Garraux, Gaëtan ULg et al

in Revue Médicale de Liège (1996), 51(9), 566-70

S'il existe des signes neurologiques caractéristiques de la maladie de Parkinson, l'expérience clinique nous apprend que l'évolution individuelle des patients parkinsoniens est fort variable, et des ... [more ▼]

S'il existe des signes neurologiques caractéristiques de la maladie de Parkinson, l'expérience clinique nous apprend que l'évolution individuelle des patients parkinsoniens est fort variable, et des études anatomopathologioques révèlent que le diagnostic clinique d'un syndrome parkinsonien est parfois difficile à poser. Nous revoyons dans cet article les diagnostics différentiels des syndromes parkinsoniens, et nous discutons l'utilité de la neuroimagerie fonctionnelle et du bilan neuropsychologique pour essayer de mieux comprendre la présentation clinique. [less ▲]

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See detailAspects of the ecology of the wood-inhabiting fungi of Laing Island (Papua New Guinea)
Castillo Cabello, Gabriel ULg; Demoulin, Vincent ULg

in Belgian Journal of Botany (1994)

Dans le cadre d'une étude sur l'écologie des champignons lignicoles de l'île de Laing (Papouasie Nouvelle-Guinée), les espèces les plus fréquemment rencontrées (en particulier: Schizophyllum commune ... [more ▼]

Dans le cadre d'une étude sur l'écologie des champignons lignicoles de l'île de Laing (Papouasie Nouvelle-Guinée), les espèces les plus fréquemment rencontrées (en particulier: Schizophyllum commune, Daldinia eschscholzii et Trametes scabrosa) ont été cartographiées. Les résultats montrent qu'il existe une bonne corrélation entre le type de répartition des champignons et le degré de couverture végétale. In the framework of a study of the ecology of wood-inhabiting fungi on Laing Island (Papua New-Guinea), the most frequently occurring species (namely Schizophyllum commune, Daldinia eschscholzii and Trametes scabrosa) were mapped. The results show a good correlation between the distribution of the fungi and the degree of vegetation cover. [less ▲]

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See detailStudies of marine epiphytic algae, Calvi, Corsica. III. Variations in the populations of epiphytic Bangiophyceae
Hoffmann, Lucien; Detienne, Xavier; Goffart, Anne ULg et al

in Cryptogamie Algologie (1994), 15(1), 53-63

Variations in the populations of Bangiophyceae (Rhodophyta) epiphytic on Cladophora prolifera and Stypocaulon scoparium were monitored qualitatively and quantitatively for two years (1981/82 and 1987/88 ... [more ▼]

Variations in the populations of Bangiophyceae (Rhodophyta) epiphytic on Cladophora prolifera and Stypocaulon scoparium were monitored qualitatively and quantitatively for two years (1981/82 and 1987/88) in nine stations with constrasting water quality in the area of Calvi (Corsica). The development of Chroodactylon ornatum was temperature dependent and showed its maximum density during the summer. The development of the other Bangiophyceae (Erythrocladia irregularis, Erythrotrichia camea, Goniotrichum alsidii, G. cornu-cewi) was correlated to the water quality in that their density increased towards the sewage discharge near to the town of Calvi. A general increase in epiphytism by Bangiophyceae between 1981 and 1988 seems to indicate an increased degree of eutrophication in the bay of Calvi. [less ▲]

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See detailEvolution of the populations of Cystoseira balearica (Phaeophyceae) and epiphytic Bangiophyceae in the Bay of Calvi (Corsica) in the last eight years
Hoffman, Lucien; Clarisse, Serge; Detienne, Xavier et al

in Bulletin de la Société Royale des Sciences de Liège (1988), 4-5

In a number of stations covering the Bay of Calvi (Corsica, Mediterranean Sea) we studied the development of the macroscopic brown alga Cyctoseira balearica and of the epiphytic microscopic Bangiophyceae ... [more ▼]

In a number of stations covering the Bay of Calvi (Corsica, Mediterranean Sea) we studied the development of the macroscopic brown alga Cyctoseira balearica and of the epiphytic microscopic Bangiophyceae. Cystoseira balearica is a major component of infralittoral communities on rocky substrates and Bangiophyceae have been considered indicators of eutrophication. The epiphytic Bangiophyceae have indeed their optimal developement near the sewages discharges (especially in summer) and near the town of Calvi. Since 1981 an increase is observed in the abundance of the Bangiophycae. Cystoseira balearica, a pollution-sensitive species, is not present in the harbours of the town of Cavi and near the sewage dicharges. Since 1980 the coverage and the standing crop of this alga have decreased. The increase of Bangiophyceae and the concurrent decrease of Cyctoseira balearica seem to indicate an increasing pollution of the waters of the Bay of Calvi in the period 1980 - 1988. [less ▲]

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See detailStudies of marine epiphytic algae, Calvi Corsica. I. Determination of minimal sampling areas for microscopic algal epiphytes
Wilmotte, Annick ULg; Goffart, Anne ULg; Demoulin, Vincent ULg

in European Journal of Phycology (1988), 23

Minimal sampling areas have been determined for marine Bangiophyceae and Cyanophyceaee epiphytic on Cladophora prolifera and Halopteris scoparia in Calvi, Corsica. This was done by observing the ... [more ▼]

Minimal sampling areas have been determined for marine Bangiophyceae and Cyanophyceaee epiphytic on Cladophora prolifera and Halopteris scoparia in Calvi, Corsica. This was done by observing the stabilization of species/area curves and of qualitative and quantitative similarity coefficients between samples of increasing size. For Cyanophyceae (studied only on Cladophora) the minimal sampling area is in the order of 15 - 38 mm2, depending on the method used. The sampling area is smaller when the quantitative similarity coefficient is used, apparently because of the rather homogeneous distribution of a few abundant taxa. For the same reason the quantitative similarity coefficient stabilizes at a high value (75 %). For Bangiophyceae on Cladophora, the area is of the order of 7 - 10 mm2, but a larger area is necessary for the quantitative than for the qualitative coefficient. The stabilized value of the quantitative coefficient is relatively low (66 %), despite the fact that the qualitative coefficient reaches 94 %. On Halopteris, by counting only on medium sized ramifications (about 100 um in diameter), one can use a sampling area as low as 0.1 - 0.5 mm2 and obtain a qualitative similarity coefficient of 100 % and a quantitative one of 80 %. This study demonstrates that techniques used for macrophytic vegetation can be applied with success to microscopic epiphytes. [less ▲]

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