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See detailLinking stable isotope methods and electrical resistivity tomography imaging: Improving our understanding of competition in poly - culture systems
Hussain, Khalid; Wongleecharoen, Chalemchart; Hilger, Thomas et al

Scientific conference (2013, September)

Poly-cultures are cropping systems using multiple crops in the same space and time, avoiding large stands of sole crops, hence contributing to reconciliation ecology. These land uses have several ... [more ▼]

Poly-cultures are cropping systems using multiple crops in the same space and time, avoiding large stands of sole crops, hence contributing to reconciliation ecology. These land uses have several advantages over monocultures, e.g. increased biodiversity and diversification of agricultural production. Coupled with soil conservation measures, they also contribute to erosion control and resource protection in fragile areas. The viability of such systems often depends on their efficiency under limited resource conditions, which in turn makes them acceptable among the farming community. Most farmers, however, are reluctant to adopt such systems because they may compete for water and nutrients. This study was conducted during 2011 on the Queen Sirikit research farm, Ban Bo Wi village, Ratchaburi province, in North-West Thailand to investigate the competition in maize based soil conservation systems. The soil at the field site ranged from an endoleptic Alisol to ahyper skelletic Leptosol. The treatments were maize under farmer's practice (control) and maize-chili intercropping combined with alley cropping of Leucaena under minimum tillage and Jack bean relay cropping with and without fertiliser application. Plot size was 4 m by 13 m and slope of 18-20%. We used both carbon isotopic discrimination and electrical resistivity tomography (ERT) imaging, a novel non-invasive method, to understand and distinguish the competition for water and nutrients in tropical field conditions. A negative relationship was observed between 13C isotopic discrimination and total nitrogen in grain with R2 ranging from 0.63 (p ≤ 0.01) to 0.70 (p ≤ 0.001) while a positive correlation was found between total nitrogen in grains and total dry matter production with R2 ranging from 0.51 (p ≤ 0.04) to 0.84 (p ≤ 0.001). Nutrient competition induced an increase in δ13C values in maize rows close to Leucaena hedgerows and decreased their total dry matter production. ERT imaging showed different water depletion patterns during the growing season, directly linked with the growth and development of maize such as leaf area index, plant height and canopy cover. This helped explaining the impact of hedgerows on crop growth and yields in maize rows adjacent to the hedges, leading to various spatial patterns along the slope. [less ▲]

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See detailThe Links between Academic Research and Public Policies in the Field of Migration and Ethnic Relations: Selected National Case Studies – Thematic Introduction
Martiniello, Marco ULg; Florence, Eric ULg

in International Journal on Multicultural Societies (2005), 7(1), 3-10

Migration issues are often thought and debated in terms of societal security. The association of migration with a series of social ills such as crime, urban disorder, unemployment, etc. in the mass media ... [more ▼]

Migration issues are often thought and debated in terms of societal security. The association of migration with a series of social ills such as crime, urban disorder, unemployment, etc. in the mass media and in some political statements is common to many countries. In these conditions, the task of social and political scientists is very delicate and complex, as they are asked to produce objective knowledge about a highly politicised set of issues. Could their work not contribute to the over-dramatisation of migration, even though their aim may be exactly the opposite? Is there not a risk for the results of their work to be misinterpreted in order to fit political strategies? [less ▲]

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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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