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See detailThe links between dyslexia and inhibition deficits: do dyslexic children with an inhibition deficit have a specific reading profile?
Verhaegen, Clémence ULg; Schelstraete, Marie-Anne; Noël, Marie-Pascale

Poster (2010, May 28)

The present study focused on the nature of the reading disability of children with both dyslexia and inhibition deficit. Van der Schoot et al. (2000; 2004); Nossent et al. (2005); Nossent and Deroux (2006 ... [more ▼]

The present study focused on the nature of the reading disability of children with both dyslexia and inhibition deficit. Van der Schoot et al. (2000; 2004); Nossent et al. (2005); Nossent and Deroux (2006) showed that these children tended more to guess the words they read because these “guessers” found difficulties in suppressing false candidate words that are activated in the lexicon. To test this account, dyslexic children with and without inhibition deficit were presented a sentence reading task. To evoke guessing, each sentence contained a word or a pseudoword which closely resembled either a valid congruent or incongruent word. Our hypothesis was that dyslexic children with inhibition deficit guessed more the word they read from the sentence context and the global word form than dyslexic children without inhibition deficit. The results showed that both dyslexics with and without inhibition deficit tended more to guess the words than control children without dyslexia and inhibition difficulties. We discussed these results with the fact that most of children with reading difficulties use the sentence context to compensate for poor reading skills. [less ▲]

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See detailLinks between Egyptian and Greek Medicine
Marganne, Marie-Hélène ULg

in Forum (1993), 3(5), 35-43

Given the present state of our knowledge, the question about the links between Egyptian and Greek medicine is far from being resolved. Some convergences can in fact be detected, but when you study them ... [more ▼]

Given the present state of our knowledge, the question about the links between Egyptian and Greek medicine is far from being resolved. Some convergences can in fact be detected, but when you study them further, you will find that they reveal a loan, or a simple coincidence, or else a false interpretation of the sources. At the end of the sixth century BC, Pharaonic medicine was outclassed and influenced little by little by Greek medicine. Lastly, the Coptic medical treatises, composed in Egyptian language, but written in Greek characters, combine some Greek and finally Arabic borrowings. [less ▲]

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See detailLinks between producers and consumers in alternative food systems in France and Belgium : sustainable development made practical ?
Lamine, Claire; Stassart, Pierre M ULg

in Proceedings of Eursafe Congress 2004 (2004)

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See detailLinks between root length density profiles and models of the root system architecture
Pagès, Loïc; Bruchou, Claude; Garré, Sarah ULg

in Vadose Zone Journal (2012)

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See detailLinoleic acid-induced activity of plant uncoupling mitochondrial protein in purified tomato fruit mitochondria during resting, phosphorylating, and progressively uncoupled respiration.
Jarmuszkiewicz, W.; Almeida, A.; Sluse-goffart, C. et al

in Journal of Biological Chemistry (1998), 273(52), 34882-34886

An uncoupling protein was recently discovered in plant mitochondria and demonstrated to function similarly to the uncoupling protein of brown adipose tissue. In this work, green tomato fruit mitochondria ... [more ▼]

An uncoupling protein was recently discovered in plant mitochondria and demonstrated to function similarly to the uncoupling protein of brown adipose tissue. In this work, green tomato fruit mitochondria were purified on a self-generating Percoll gradient in the presence of 0.5% bovine serum albumin to deplete mitochondria of endogenous free fatty acids. The uncoupling protein activity was induced by the addition of linoleic acid during the resting state, and in the progressively uncoupled state, as well as during phosphorylating respiration in the presence of benzohydroxamic acid, an inhibitor of the alternative oxidase and with succinate (+ rotenone) as oxidizable substrate. Linoleic acid strongly stimulated the resting respiration in fatty acid-depleted mitochondria but had no effect on phosphorylating respiration, suggesting no activity of the uncoupling protein in this respiratory state. Progressive uncoupling of state 4 respiration decreased the stimulation by linoleic acid. The similar respiratory rates in phosphorylating and fully uncoupled respiration in the presence and absence of linoleic acid suggested that a rate-limiting step on the dehydrogenase side of the respiratory chain was responsible for the insensitivity of phosphorylating respiration to linoleic acid. Indeed, the ADP/O ratio determined by ADP/O pulse method was decreased by linoleic acid, indicating that uncoupling protein was active during phosphorylating respiration and was able to divert energy from oxidative phosphorylation. Moreover, the respiration rates appeared to be determined by membrane potential independently of the presence of linoleic acid, indicating that linoleic acid-induced stimulation of respiration is due to a pure protonophoric activity without any direct effect on the electron transport chain. [less ▲]

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See detailLinseed oil supplementation in diet for horses: Effects on palatability and digestibility
Delobel, Agathe; Fabry, Christophe ULg; Schoonheere, Nicolas ULg et al

in Livestock Science (2008), 116

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See detailLinseeds in fattening diet for Belgian Blue culled cows and growing bulls in order to improve the n-3 fatty acids content in meat
Robaye, Vincent ULg; Dotreppe, Olivier ULg; Cabaraux, Jean-François ULg et al

in 11th Congress of the European Society of Veterinary and Comparative Nutrition (2007)

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See detailThe Lion of Çolaklıköy
Tunca, Önhan ULg

in Anatolian Studies 26 (1976)

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See detailLipase catalysis and thiol-Michael addition: a relevant association for the synthesis of new surface active carbohydrate esters
Boyère, Cédric ULg; Favrelle, Audrey ULg; Broze, Guy ULg et al

in Carbohydrate Research (2011), 346(14), 2121-2125

A novel class of surface-active carbohydrate esters is prepared by a two-step strategy that takes advantage of the selectivity of enzymatic catalysis and the versatility of the thiol-Michael addition ... [more ▼]

A novel class of surface-active carbohydrate esters is prepared by a two-step strategy that takes advantage of the selectivity of enzymatic catalysis and the versatility of the thiol-Michael addition reaction. The surfactant performance of the produced aliphatic, fluorinated and silicon based sugar esters are evaluated by surface tension measurements. The novel thiolated mannose, made available in this work, appears as a powerful building block for the incorporation of unprotected sugar moieties into complex molecules. [less ▲]

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See detailLipase from Yarrowia lipolytica.
Destain, Jacqueline ULg; Weber, D.; Thonart, Philippe ULg

in Mededelingen van de Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen (Rijksuniversiteit te Gent) (1997), 62(4a),

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See detailLipase production by Yarrowia lipolytica: study of the effects of operating conditions by factorial design of experiments
Lopes, M.; Gomes, I.; Araújo, C. et al

in European Symposium on Biochemical Engineering Science : book of abstracts”. [S.l. : s.n. 2006] (2006, August)

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See detailLipase production in Yarrowia lipolytica overproducing mutants.
Fickers, P.; Nicaud, J. M.; Destain, Jacqueline ULg et al

Poster (2002, July)

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See detailLipase synthesis of fatty acid sugar esters in pure ionic liquids
Galonde, Nadine ULg

Poster (2010, October 14)

Sugar fatty acid esters are broadly consumed in many commercial applications and their synthesis gained a considerable interest since they are biodegradable, tasteless, odorless, non-toxic and non ... [more ▼]

Sugar fatty acid esters are broadly consumed in many commercial applications and their synthesis gained a considerable interest since they are biodegradable, tasteless, odorless, non-toxic and non-irritant. Ionic liquids are organic salts entirely comprised of ions with a melting point below 100°C. This new category of solvent may allow the enzymatic synthesis of sugar fatty acid ester to go toward a “greener” process. Within the purpose of using “green” systems for synthesis of glycosylated compounds, studies on the use of ionic liquids to obtain fatty acid sugar esters with carbohydrates coming from lignocellulosic material as substrates was carried out. The enzymatic synthesis of mannose myristate ionic liquids as enzymatic medium and the yield obtained will be presented in our poster. [less ▲]

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See detailLipase-assisted synthesis of potential bio-based surfactants starting from lignocellulosic carbohydrates
Richard, Gaetan ULg; Nott, Katherine ULg; Paquot, Michel ULg et al

Poster (2010, April)

Surfactants constitute an important class of compounds with a lot of applications, especially in the food and beverage industries (emulsion forming and stabilization, antiadhesive and antimicrobial ... [more ▼]

Surfactants constitute an important class of compounds with a lot of applications, especially in the food and beverage industries (emulsion forming and stabilization, antiadhesive and antimicrobial activities)1. With the prospect of synthesising new active compounds, white biotechnology offers efficient tools. Indeed, the use of enzymes as biocatalysts provides an interesting synthetic route in comparison to the chemical way that often requires high reaction temperatures and suffers from a lack of specificity, resulting in complex mixtures. Among all the biocatalysts available, lipases represent a class of industrial interest 2,3. In parallel, the starting material is also an important parameter : due to the depletion of petroleum reserves, its ever increasing price and various environmental aspects, the use of renewable or biomass resources is inevitable. Within the frame of a biorefinery project, we focused on the lipase-assisted modification of uronic acids. These carbohydrates can be obtained from lignocellulosic material, and, in the presence of fatty alcohols, the Candida antarctica lipase B catalyses the synthesis of amphiphilic compounds. Owing to the initial conditions used and the addition of co-solvents, we optimized the synthesis of these bio-based potential surfactants, and obtained a panel of various structures depending to the acyl acceptor used. The poster will present the details of these syntheses. [less ▲]

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See detailLipase-catalyzed interesterification of butterfat with rapeseed oil: new approaches for the monitoring of the reaction.
Hanon, Emilien ULg; Aguedo, Mario ULg; Danthine, Sabine ULg et al

Poster (2007)

Butterfat (BF) is one main source of diet fats. However, it has been less and less well perceived due to its poor spreadability when refrigerated and cholesterol and saturated fatty acids, promoters of ... [more ▼]

Butterfat (BF) is one main source of diet fats. However, it has been less and less well perceived due to its poor spreadability when refrigerated and cholesterol and saturated fatty acids, promoters of coronary heart diseases. Thus, consumer’s demand for healthy palatable fat spreads with good development of modified butter-based spreads. One ordinary method used by manufacturers for such modifications is enzymatic interesterification of a lipase to restructure triacylglycerides (TAG), i.e. to induce the exchange of fatty acid residues amongst glycerol backbones. This leads to changes in TAG species and in physical properties of the fat, namely in solid fat content (SFC) and in melting profile. Rapeseed oil (RO) contains a large amount of oleic acid and has significant contents of linoleic and linolenic acids, i.e. a high global content of unsaturation-rich residues. Thus, EIE of BF with RO may bring nutritional improvements to the reaction product, when compared to BF alone. The EIE of BF and canola oil (a low-erucic acid RO) catalyzed by the immobilized sn-1,3 specific Rhizopus arrhizus lipase in solvent-free batch and micro-aqueous systems, was previously studied. The aim of the present study was first to assess the evolution of chemical, physical and thermal modifications occurring during solvent-free batch EIE of BF and RO, with the use of lipozyme TL IM. The evolution of TAG profiles, interesterification degree, dropping point, solid fat content and free fatty acids was monitored during the reaction, especially during the first hours. Differential scanning calorimetry was also applied to follow the formed product. Then the establishment of relations between the DP and differential scanning calorimetry data and the interesterification degree was emphasized. [less ▲]

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See detailLipase-catalyzed synthesis of L-cysteine glucosyl esters in organic media
Valepyn, Emmanuel ULg; Nys, Joël ULg; Richel, Aurore ULg et al

in Biocatalysis & Biotransformation (2011), 29(1), 25-30

New sugar amino acids were synthesized by enzymatic esterification of D -glucose with L -cysteine using immobilized lipase B from Candida antarctica in a mixed solvent system composed of 2-methyl-2 ... [more ▼]

New sugar amino acids were synthesized by enzymatic esterification of D -glucose with L -cysteine using immobilized lipase B from Candida antarctica in a mixed solvent system composed of 2-methyl-2-butanol and dimethyl sulfoxide. Addition of small quantities of water to the medium improved the glucose conversion yield by a factor of two. [less ▲]

Detailed reference viewed: 49 (11 ULg)