References of "Paquot, Michel"
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See detailCharacterization of pectins extracted from banana peels (Musa AAA) under different conditions using an experimental design
Happi Emaga, Thomas ULg; Ronkart, Sébastien ULg; Robert, Christelle et al

in Food Chemistry (2008), 108(2), 463-471

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See detailDietary fibre components and pectin chemical features of peels during ripening in banana and plantain varieties.
Happi Emaga, Thomas ULg; Robert, Christelle; Ronkart, Sébastien ULg et al

in Bioresource Technology (2008), 99(10), 4346-4354

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See detailChangements texturaux et biochimiques des fruits du bananier au cours de la maturation. Leur influence sur la preservation de la qualite du fruit et la maitrise de la maturation.
Happi Emaga, Thomas; Wathelet, Bernard ULg; Paquot, Michel ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2008), 12(1), 89-98

The best conservation of the initial quality of the banana trees fruits after harvest requires a full understanding of their process of maturation and senescence. Maturation is an irreversible phenomenon ... [more ▼]

The best conservation of the initial quality of the banana trees fruits after harvest requires a full understanding of their process of maturation and senescence. Maturation is an irreversible phenomenon, highly coordinated, genetically programmed and involving a series of physiological, biochemical and organoleptic changes. Textural softening during ripening leads to adverse effects and spoilage upon storage. This process is influenced by ethylene, carbon dioxide, temperature and oxygen. The major classes of cell wall polysaccharides that undergo modifications during ripening are starch, pectins, cellulose and hemicelluloses. These modifications are allotted to the action of enzymes. [less ▲]

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See detailPhospholipids quantification in vegetable oil degumming residues by HPLC-ELSD
Pierart, Céline ULg; Danthine, Sabine ULg; Wathelet, B et al

Poster (2008)

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See detailEnzymatically prepared n-alkyl esters of glucuronic acid: The effect of freeze-drying conditions and hydrophobic chain length on thermal behavior
Blecker, Christophe ULg; Danthine, Sabine ULg; Petre, Maguy ULg et al

in Journal of Colloid & Interface Science (2008), 321(1), 154-158

In this work, some of the physicochemical properties of enzymatically prepared n-alkyl esters of glucuronic acid are presented. Two questions are addressed. The first concerns the influence of post ... [more ▼]

In this work, some of the physicochemical properties of enzymatically prepared n-alkyl esters of glucuronic acid are presented. Two questions are addressed. The first concerns the influence of post-purification freeze-drying condition's on octyl glucuronate thermotropic behavior. Depending on the amount of water added before freeze-drying, the alpha/beta anomeric ratio determined by H-1 NMR is affected and differences are observed in DSC thermograms probably due to polymorphism. The second question concerns the effect of hydrophobic chain length on the thermal behavior. An increase of both transition temperature and transition enthalpy is observed by increasing the number of carbon atoms in the alkyl chain (C8 < C10 < C12 < C14). This kind of results can provide relevant information for the processing and the practical use of these nonionic surfactants. (C) 2008 Elsevier Inc. All rights reserved. [less ▲]

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See detailEffect of Fengycin, a Lipopeptide Produced by Bacillus Subtilis, on Model Biomembranes
Deleu, Magali ULg; Paquot, Michel ULg; Nylander, T.

in Biophysical Journal (2008), 94(7), 2667-2679

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See detailInfluence of environmental conditions on the interfacial organisation of fengycin, a bioactive lipopeptide produced by Bacillus subtilis
Eeman, Marc; Pegado, Luis; Dufrêne, Yves et al

Poster (2008)

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See detailMECHANICAL PRETREATMENT EFFECT ON CELLULOSE ENZYMATICAL HYDROLYSIS
Jacquet, Nicolas ULg; Paquot, Michel ULg

Poster (2008)

Lignocellulosic materials are very interesting for the production of bioethanol after chemical or enzymatical hydrolysis of cellulose. To optimise production rate and increase the output of these ... [more ▼]

Lignocellulosic materials are very interesting for the production of bioethanol after chemical or enzymatical hydrolysis of cellulose. To optimise production rate and increase the output of these processes, different kinds of pre-treatments (grinding, steam explosion…) are often needed for opening the fibrous structure of the cellulose and increase the specific surface of the materials. The present study is focused on two models of “pure” cellulose (cellulose C200 microtechnik, cellulose FD100 FMC biopolymer) in order to analyse the effects of mechanical pretreatments on the kinetics and yields of hydrolysis. The cristallinity index differentiates the two celluloses. Hydrolysis is realized by a cellulase mix (cellulase Trichoderma reesei C2730, Novozyme; cellobiase Aspergillus niger C6105). Results present the influence of homogenisation pretreatment and analyse differents parameters of this technology. [less ▲]

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See detailNanoscale membrane activity of surfactins: Influence of geometry, charge and hydrophobicity
Francius, Gregory; Dufour, Samuel; Deleu, Magali ULg et al

in Biochimica et Biophysica Acta - Biomembranes (2008), 1778

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See detailAnalyse des lipides polaires de la MFGM par SPE et HPLC-ELSD
Bodson, P.; Danthine, Sabine ULg; Blecker, Christophe ULg et al

Poster (2008)

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See detailSynthèse de nouveaux surfactants dérivés des acides D-glucuronique et D-galacturonique.
Laurent, Pascal ULg; Richel, Aurore ULg; Richard, Gaetan ULg et al

Poster (2008)

A l'heure actuelle, le bioraffinage se présente de plus en plus comme une alternative prometteuse aux filières pétrochimiques puisqu'il vise à la fois le remplacement d'une partie du pétrole comme source ... [more ▼]

A l'heure actuelle, le bioraffinage se présente de plus en plus comme une alternative prometteuse aux filières pétrochimiques puisqu'il vise à la fois le remplacement d'une partie du pétrole comme source d'énergie et le développement de produits chimiques issus de la biomasse (végétale principalement) tels que détergents, produits phytopharmaceutiques, dissolvants, matières plastiques, etc. La valorisation de carbohydrates provenant de matières premières renouvelables [1] fait ainsi actuellement l'objet de nombreuses recherches. Dans ce cadre, la synthèse de nouveaux tensioactifs non ioniques dérivés des acides Dglucuronique et D-galacturonique a été effectuée de manière chimique et/ou enzymatique. [less ▲]

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See detailAnalytical methodologies for quantification of ferulic acid and its oligomers
Barberousse, Helene; Roiseux, Olivier; Robert, Christelle et al

in Journal of the Science of Food and Agriculture (2008), 88(9), 1494-1511

Ferulic acid (4-hydroxy-3-methoxycinnamic acid) is the most widespread hydroxycinnamic acid in the plant world, where it is a key molecule in cell wall architecture. Owing to its high antioxidant ... [more ▼]

Ferulic acid (4-hydroxy-3-methoxycinnamic acid) is the most widespread hydroxycinnamic acid in the plant world, where it is a key molecule in cell wall architecture. Owing to its high antioxidant properties, ferulic acid shows large potential applications in food industry as well as in the health and cosmetic markets. There is thus a high interest in extracting this high-value compound from waste materials of the agricultural industry, which requires the selection of an appropriate quantification method. This paper therefore gives an overview of analytical methodologies developed over past decades for quantification of ferulic acid and its oligomers. (c) 2008 Society of Chemical Industry. [less ▲]

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See detailEthanolic fermentation as a tool for high added value products purification from biomass
Destain, Jacqueline ULg; Laurent, Pascal ULg; Thonart, Philippe ULg et al

Poster (2008)

The biorefinery concept implies the development of processes in order to valorise the whole part of a crop. In this concept, white biotechnologies are usually considered for the production of new ... [more ▼]

The biorefinery concept implies the development of processes in order to valorise the whole part of a crop. In this concept, white biotechnologies are usually considered for the production of new compounds or compounds actually derived from the oil industry. For example, interest in ethanolic fermentation is growing nowadays, mainly for its energetic applications, starting from starch or saccharose. Biorefinery integrating lignocellulosic materials are under development. Whatever the initial substrate may be, wet technologies would produce sugars and other soluble materials from the biomass. Different results could be expected:most of the hydrolysates molecules are used by the microorganisms;some molecules could be inhibitors for the fermentation;some molecules are "indifferent ones" and could be concentrated by the fermentation proccess followed by distillation. In the latest case, these molecules are concentrated in the residual medium and could be more easily recuperated. An example of this exists in the production of ethanol from beet. The different juices (diffusion, clarified, ...) contain molecules such as raffinose, glutamine, betaine, saponins or pectic materials. Some products are used by the yeasts and other are concentrated. Our purpose is to summary the results obtained, allowing the development of the concept in other biorefinery applications. [less ▲]

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See detailBioethanol subproducts as a basis of plant biorefinery
Destain, Jacqueline ULg; Laurent, Pascal ULg; Ndoye, Bassirou et al

Poster (2008)

The philosophy of our research is built on the behaviour of non-sugar compounds from biomass during ethanolic fermentation. Saccharomyces cerevisiae, industrially used to bioconvert sugar into ethanol ... [more ▼]

The philosophy of our research is built on the behaviour of non-sugar compounds from biomass during ethanolic fermentation. Saccharomyces cerevisiae, industrially used to bioconvert sugar into ethanol under anaerobic conditions, assimilates some compounds present in the fermentable juice (proteins, amino acids,...). But others compounds are not used by the yeast. They leave in the vinasse after ethanol distillation and are thus concentrated by the process. Our purpose is to discuss the behaviour of betaine, saponins and raffinose in sugar juices (raw juice, thin juice, thick juice) and in vinasse after ethanolic fermentation. An attention will be given to some high added value products (like betaine) and the potentialities to use fermentation as a tool of purification in white chemistry. [less ▲]

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See detailEffect Of Variety And Harvest Date On Pectin Extracted From Chicory Roots (Cichorium Intybus L.)
Robert, Christelle; Happi Emaga, Thomas; Wathelet, Bernard ULg et al

in Food Chemistry (2008), 108(3),

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See detailComposition And Physicochemical Extracted From Whole Seeds By Acid Properties Of Locust Bean Gum Or Water Dehulling Pre-Treatment
Dakia, Patrick; Blecker, Christophe ULg; Robert, Chiristelle et al

in Food Hydrocolloids (2008), 22(5),

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See detailIsolation and identification of inulooligosaccharides resulting from inulin hydrolysis
Ronkart, Sebastien N; Blecker, Christophe ULg; Fourmanoir, Hélène et al

in Analytica Chimica Acta (2007), 604(1), 81-87

In this study, inulooligosaccharides (F-n-type inulin) resulting from the endo-inulinase hydrolysis of globe artichoke inulin were purified and characterized. The aim was to produce F-n oligomer standards ... [more ▼]

In this study, inulooligosaccharides (F-n-type inulin) resulting from the endo-inulinase hydrolysis of globe artichoke inulin were purified and characterized. The aim was to produce F-n oligomer standards with the intention of identifying them in the complex inulin chromatogram. Inulin was extracted from globe artichoke and presented a high average degree of polymerization (DP) of about 80 as determined by high-performance anion exchange chromatography coupled with pulsed amperometric detection (HPAEC-PAD). This inulin was hydrolyzed by a commercial endo-inulinase yielding a product with a very high F-n/GF(n), molecule ratio, thus limiting the interference of GF(n) during the purification process. High performance size exclusion chromatography was used to individually isolate and collect each retention peak corresponding to a specific oligomer. The purity of these fractions was checked by HPAEC-PAD and showed that relatively pure molecules were produced. Electrospray ionization mass spectrometry allowed the molecular weight determination of these purified oligomers and ascertained their DP as F-2, F-3 and F-4. These F2-4 standards were used with glucose, fructose, sucrose and GF(2-4) (commercially available) to spike commercial oligofructose products in order to determine the elution profile in the HPAEC-PAD chromatogram. [less ▲]

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