References of "Thonart, Philippe"
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See detailSelection of hydrocarbon degrading bacteria based on drying resistance criteria.
Jacques, Ph.; Weekers, F.; Bastiaens, L. et al

Poster (1996, May)

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See detailSelection of hydrocarbon degrading bacteria with drought resistance characteristics
Weekers, F.; Jacques, Philippe ULg; Springael, D. et al

in Mededelingen van de Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen (Rijksuniversiteit te Gent) (1996), 61/4b

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See detailFoaming Properties Of Surfactin, A Lipopeptide Biosurfactant From Bacillus Subtilis
Razafindralambo, Hary ULg; Paquot, Michel ULg; Baniel, Alain et al

in Journal of the American Oil Chemists' Society (1996), 73(1), 149-151

Foaming properties of surfactin were investigated and compared to those of sodium dodecyl sulfate (SDS) and bovine serum albumin (BSA). Foams were formed by a bubbling technique. Evolution of the foam ... [more ▼]

Foaming properties of surfactin were investigated and compared to those of sodium dodecyl sulfate (SDS) and bovine serum albumin (BSA). Foams were formed by a bubbling technique. Evolution of the foam volume and the liquid in the foam was monitored with optical and conductimetric methods to characterize foam formation and stability. Excellent foaming properties of surfactin were shown by its higher ability to form and stabilize the foam at a concentration as low as 0.05 mg/mL, in comparison with SDS and BSA. Surfactin produced a foam with intermediate maximum density and stabilized the liquid in foam, as well as BSA. [less ▲]

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See detailProduction of sulfur from gypsum as an industrial byproduct
Hiligsmann, Serge ULg; Deswaef, Sophie; Taillieu, Xavier et al

in Applied Biochemistry and Biotechnology (1996), 57-8

Biological sulfate reduction was investigated at the bench and pilot scales in order to determine optimum culture conditions. Efficient strains of sulfate-reducing bacteria (SRB) were selected by ... [more ▼]

Biological sulfate reduction was investigated at the bench and pilot scales in order to determine optimum culture conditions. Efficient strains of sulfate-reducing bacteria (SRB) were selected by classical microbiological methods and by mutagenesis. Improvement factors, including stripping, scale-up, sulfate,and organic substrate concentrations, have been studied in batch bioreactors. Two types of pilot-scale bioreactors have been adopted, the first being completely mixed with free cells and the second having two stages with immobilized cells on a fixed bed. An overall bioconversion capacity of 11 kg/m(3) . d of gypsum and 1.2 kg/m(3) . d of dissolved organic carbon has been achieved in the two-stage bioreactor. [less ▲]

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See detailTreatment of gypsum waste in a two stage anaerobic reactor
Deswaef, Sophie; Salmon, Thierry ULg; Hiligsmann, Serge ULg et al

in Water Science & Technology (1996), 34(5-6), 367-374

The reduction of high concentrations of gypsum (up to 110 kg/m(3)) is investigated in a two stage immobilised cell bioreactor. The first stage is mainly colonised by a consortium of acidogenic bacteria ... [more ▼]

The reduction of high concentrations of gypsum (up to 110 kg/m(3)) is investigated in a two stage immobilised cell bioreactor. The first stage is mainly colonised by a consortium of acidogenic bacteria and sulphate reducing bacteria oxidising volatile fatty acids with more than 2 carbons (mainly, butyrate and propionate). The gypsum consumption rate is rather high (ii kg/m(3).day). Most of acetate remains unconverted in this first stage. It is partially converted in the second stage (residence time : 12 days) which is predominantly colonised by acetate oxidising bacteria The gypsum consumption rate is much lower than in the first stage : 3 kg/m(3).day. With both stages, it is possible to reach an almost complete conversion of gypsum with an overall capacity of 6.1 kg gypsum/m(3).day. We propose also a very simple model to describe the different transformation rates. It allows us to clearly identify the activity levels of the different types of sulphate reducing bacteria in both stages. Copyright (C) 1996 IAWQ. [less ▲]

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See detailImpact of the microbiology in the epuration processes.
Thonart, Philippe ULg; Destain, Jacqueline ULg; Antoine, Patrice et al

in Cerevisia and Biotechnology (1996), 21(2), 76-79

Biological treatments will progressively play a key role in the epuration process. Indeed, they show different advantages like reaction specificity, multiple degradation potentialities and efficiency at ... [more ▼]

Biological treatments will progressively play a key role in the epuration process. Indeed, they show different advantages like reaction specificity, multiple degradation potentialities and efficiency at very low concentrations of pollutants. Two approaches can be considered for developing biological processes of epuration : addition of bioactivators for improving endogenous microorganisms capabilities or introduction of microorganism starters for accelerating the epuration process. These two ways need as prerequisite a basic knowledge of the metabolic pathways for specific compound degradation and of microbial ecology [less ▲]

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See detailUtilisation de Bacillus subtilis (Cohn) comme insecticide a l'egard de Drosophila melanogaster (Meigen).
Lazare, K.; Haubruge, Eric ULg; Lienard, V. et al

in Mededelingen van de Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen (Rijksuniversiteit te Gent) (1996), 61(3a),

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See detailInfluence of the production of two lipopeptides, Iturin A and Surfactin S1, on oxygen transfer during Bacillus subtilis fermentation
Hbid, Choukri; Jacques, Philippe; Razafindralambo, Hary ULg et al

in Applied Biochemistry and Biotechnology (1996), 57-8

Bacillus subtilis produces three types of lipopeptides: Iturins, Fengycins, and Surfactins. These amphiphilic molecules influence the volumetric oxygen transfer (K(L)a) like chemical surfactant. K(L)a ... [more ▼]

Bacillus subtilis produces three types of lipopeptides: Iturins, Fengycins, and Surfactins. These amphiphilic molecules influence the volumetric oxygen transfer (K(L)a) like chemical surfactant. K(L)a values were from two- to fivefold lower when both Iturin A and Surfactin S1 were coproduced, and from 0.57- to 0.8-fold lower when only Iturin A was produced. The addition of an oxygen vector (n-Dodecane) during fermentation increased K(L)a values (7.5-fold) and biomass production (twofold), and decreased Iturin A and Surfactin S1 production. However, at high stirring conditions and in the presence of n-Dodecane, Iturin A production was improved. [less ▲]

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See detailThe efficacy in vitro and in vivo of bacteriocin against Erwinia amylovora : comparison of biological and chemical control of fire blight
Jabrane, A.; Deckers, T.; Ledoux, L. et al

in Acta Horticulturae (1996), 411

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See detailTaphocoenosis of miocene taxodiaceous wood from the Entre-Sambre-et-Meuse cryptokarsts (southern Belgium)
De Putter, T.; Roche, M.; Dupuis, C. et al

in N. Jb. Geol. Palaont. Abh. (1996), 202(2), 259-268

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See detailInfluence of lipopeptide production on oxygen transfer during fermentation of Bacillus subtilis
Hbid, Choukri; Jacques, Philippe; Razafindralambo, Hary ULg et al

Poster (1995, May 07)

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See detailOxygen transfert during Bacillus subtilis fermentation. Influence of lipopeptide production, and an oxygen vector.
Hbid, Ch.; Jacques, Ph.; Meurice, E. et al

Poster (1995, May)

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See detailProduction of sulfur from gypsum as an industrial by-product.
Hiligsmann, Serge ULg; Taillieu, X.; Deswaef, S. et al

Poster (1995, May)

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See detailPyoverdine-Mediated Uptake of iron in Pseudomonas putida BTP1 : involvement of a 100 KD IROMP.
Delfosse, Ph.; Ongena, Marc ULg; Jacques, Ph. et al

Poster (1995, April)

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See detailCoproduction of fengycin and iturin, surfactn or mycosubtilin lipopeptides from Bacillus subtilis
Hbid, C.; Jacques, Philippe ULg; Razafindralambo, Hary ULg et al

in Archives of Physiology & Biochemistry (1995), 103

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See detailDegradation of tyrosine and phenylalanine by anaerobic bacterial consortia.
Antoine, P.; Taillieu, X.; Jacques, Philippe ULg et al

Poster (1995, February)

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See detailPurification of a novel dehydrogenase : a vanillin : NAD(P) oxidoreductase.
Bare, G.; Moukil, M. A.; Swiatkowski, T. et al

Poster (1995, February)

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See detailProduction and properties of Yarrowia lipolytica lipase.
Destain, Jacqueline ULg; Valepyn, Emmanuel ULg; Roblain, D. et al

Poster (1995, February)

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See detailBatch culture of Streptomyces virginiae in multi-agitated fermentors. Microbiology, power comsumption, oxygen transfer and scale up
Gheeraerds, J. M.; Rikir, R.; Ait Abderrahim, F. et al

Poster (1995, February)

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