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See detailCharacterisation and control of the reproduction and growth parameters of Djallonke ovines (Ovis amon aries)
Gbangboche, Armand; Hornick, Jean-Luc ULg; Adamou-N'Diaye, Maman et al

in Annales de Médecine Vétérinaire (2005), 149(3), 148-160

Plusieurs années d’efforts de recherches témoignent que l’élevage des ovins Djallonké est une activité majeure dans l’Afrique subsaharienne, si l’on en juge par la masse des connaissances produites. Les ... [more ▼]

Plusieurs années d’efforts de recherches témoignent que l’élevage des ovins Djallonké est une activité majeure dans l’Afrique subsaharienne, si l’on en juge par la masse des connaissances produites. Les auteurs, au travers d’un inventaire des différentes contributions scientifiques et techniques de 1967 à 2004, rapportent les performances de reproduction et de croissance des ovins Djallonké et les facteurs de leur variation. Les performances de reproduction ont été évaluées au travers de six critères zootechniques : cyclicité sexuelle annuelle, précocité sexuelle, intervalle entre agnelages, productions laitières, prolificité et mortalité des agneaux. Les performances de croissance ont été étudiées pendant deux périodes : la période d’allaitement naturel (croissance entre naissance et sevrage) et la période post sevrage. Les estimations des paramètres génétiques (héritabilité, corrélations génétiques et phénotypiques, répétabilité) de quelques caractères de reproduction et de croissance, ainsi que les résultats d’amélioration génétique, ont été passés en revue. Les conseils pratiques sont loin d’être uniformes étant donné la grande diversité des conditions d’expérimentation et d’analyse entre les différentes publications. [less ▲]

Detailed reference viewed: 93 (7 ULg)
See detailCharacterisation and identification of new strain of the lactobacilus casei group
Bayane, A.; Diawara, B.; Roblain, D. et al

Poster (2003, June)

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See detailCharacterisation and potential role of metallothioneins in marine mammals
Das, Krishna ULg; Jacob, Valérie; Debacker, Virginie ULg et al

in Comparative Biochemistry and Physiology (2000, July), 126A(Supp. 1), 37

In the framework of a North Sea and adjacent areas monitoring, metallothioneins (MTs) have been studied in livers and kidneys of 8 marine mammals species collected on the Belgian coast and in the ... [more ▼]

In the framework of a North Sea and adjacent areas monitoring, metallothioneins (MTs) have been studied in livers and kidneys of 8 marine mammals species collected on the Belgian coast and in the Northeast Atlantic between 1993 and 2000: the harbour porpoise Phocoena phocoena , the harbour seal Phoca vitulina, the white beaked dolphin Lagenorhynchus albirostris, the white sided dolphin Lagenorhynchus acutus, the sperm whale Physeter macrocephalus, the fin whale Balaenoptera physalus, the common dolphin Delphinus delphis and the striped dolphin Stenella coeruleoalba. The participation of this protein in metal detoxification has been investigated since high levels of cadmium (Cd) and mercury (Hg) have been measured in livers and kidneys of those marine mammals. It appears that MT concentrations vary widely in marine mammals tissues (from 50 to more than 2000 µg.g–1 dw) underlying the numerous parameters involved: species, tissue, physiological status, pregnancy, age, diet and metal level. The percentage of the cytosolic Cd bound to MTs can reach almost 100%. On the contrary, the percentage of hepatic and renal Hg bound to MT is very low (generally less than 10 %) and this metal is mainly associated with selenium (HgSe) under a detoxified form in the insoluble fraction of the tissues. Characterisation of renal MTs of white-sided dolphin has been performed: the protein has two isoforms (MT-1 and MT-2) with a molecular weight estimated around 6800. MT-1 can bind Cu, Zn, Hg and Cd while MT-2 only binds Zn, Hg and Cd suggesting different metabolic functions for the two isoforms. MT-2 was also more abundant than MT-1. To conclude, MTs appear to play a minor role in the binding and detoxification of Hg by marine mammals. On the contrary, close and dynamic interactions occur between Cd and MTs. White-sided dolphin metallothioneins has two isoforms likely characterised by different metabolic functions in relation with cellular homeostasis and cadmium detoxification. [less ▲]

Detailed reference viewed: 58 (5 ULg)
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See detailCharacterisation of a novel topical nanoemulsion vehicle with spreading properties
Roland, Isabelle ULg; Gillard, Patricia ULg; Delattre, Luc ULg et al

in Proceedings of Eur conference on drug delivery and pharmaceutical technology (2004)

Detailed reference viewed: 32 (1 ULg)
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See detailCharacterisation of a scroll expander for small scale absorption power and cooling cycle activated by solar energy or waste heat
Mendoza, Luis Carlos; Navarro, Joaquin; Lemort, Vincent ULg et al

Poster (2012, September)

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See detailCharacterisation of a secondary carotenoid producer microalga of the genus Coelastrella
Corato, Amélie ULg

Poster (2016)

Some green microalgae synthesize secondary carotenoids as protecting agents under stress. These pigments have high value as feed supplement for aquaculture and as health products. The most promising ... [more ▼]

Some green microalgae synthesize secondary carotenoids as protecting agents under stress. These pigments have high value as feed supplement for aquaculture and as health products. The most promising pigment is astaxanthin, because of its antioxidant, antitumoral and anti-inflamatory properties. The most used natural source of this pigment is the microalga Haematococcus pluvialis. However this species grows slowly and lacks robustness for easy cultivation. Therefore, other species are investigated for astaxanthin production. Here, we identified a locally isolated strain as Coelastrella sp. that is a secondary carotenoid producer. [1] A known typical feature of this genus, that we could observed in the strain by scanning electron microcopy, is the presence of meridional ribs. [2] We analyzed the culture conditions and concluded that this strain grows both autotrophically and heterotrophically and is able of fast change in pigment composition under controlled stress conditions. Thanks to HPLC analyses, we determined that the strain accumulates a variety of secondary carotenoids, among which: astaxanthin, cantaxanthin and echinenone. Unidentified compounds will be further analyzed by mass spectrometry. [less ▲]

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See detailCharacterisation of an enamelled metallic object found in Guerrero Negro (Baja California) by PIXE and RBS techniques
Calvo Del Castillo, Helena ULg; Ruvalcaba Sil, Jose Luis; Salinas Nolasco, Flavio M et al

in Nuclear Instruments & Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms (2008), 266

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See detailCharacterisation of an original model of myocardial infarction provoked by coronary artery thrombosis induced by ferric chloride in pig
Dogné, Jean-Michel ULg; Rolin, S.; Tchana-Sato, Vincent ULg et al

in European Heart Journal (2005, September), 26(Suppl. 1), 455-456

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See detailCharacterisation of aphid myrosinase and degradation studies of glucosinolates
Francis, Frédéric ULg; Lognay, Georges ULg; Wathelet, Jean-Paul ULg et al

in Archives of Insect Biochemistry and Physiology (2002), 50(4), 173-182

Myrosinase from Brevicoryne brassicae was purified by ammonium sulfate fractionation, dialysis, and chromatography on a DEAE column. The chromatography yielded a single peak and a 115.6-fold purification ... [more ▼]

Myrosinase from Brevicoryne brassicae was purified by ammonium sulfate fractionation, dialysis, and chromatography on a DEAE column. The chromatography yielded a single peak and a 115.6-fold purification. Further FPLC gel filtration gave a single peak at 120 kDa. Denaturing SDS/PAGE of the protein revealed a single band at 60 kDa, indicating that the native B. brassicae myrosinase is a dimer. Kinetic parameters towards 8 glucosinolates were calculated. Strong differences of V-max and Km were observed depending on the substrate. Degradation products of each glucosinolate were identified and quantified by GC-MS and GLC-FID, respectively. Using both crude aphid homogenates and purified myrosinase, two unique hydroxyglucosinolates, 3-butenyl- and benzyl-isothiocyanates were identified from progoitrin ((2S)-2-hydroxybut-3-enyl-glucosinolate) and sinalbin (4-hydroxybenzyl-glucosinolate) degradation respectively. Addition of ascorbic acid to the reaction mixtures containing sinalbin and progoitrin caused the production of hydroxyloted degradation products usually associated with plant myrosinase metabolisation. The occurrence of the myrosinase system in B. brassicae is discussed in terms of similar allelochemical adaptation between the herbivore and its host plant. (C) 2002 Wiley-Liss, Inc. [less ▲]

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See detailCharacterisation of aqueous suspensions of fumed aluminium oxide in presence of two Dolapix dispersants
Gaydardzhiev, Stoyan ULg; Ay, Peter

in Journal of Materials Science (2006), 41

The stability of a fumed aluminium oxide nano powder suspended in water has been assessed through measurement of zeta potential and streaming current, using the fact that the particles exhibit maximum ... [more ▼]

The stability of a fumed aluminium oxide nano powder suspended in water has been assessed through measurement of zeta potential and streaming current, using the fact that the particles exhibit maximum repulsion at high magnitude of charge. Two commercial dispersants belonging to a Dolapix series have been tested. Dolapix CE 64 has shown a better deflocculating action than Dolapix A 88. The iso electric point of the powder suspension has been found close to pH 9. A notable shift in the pH of iso electric point when Dolapix CE 64 was present, indicating that the interaction between particles and dispersant has involved chemical sorption. It has been found out, that at the relative low solids loading studied and within the limits of the pH measurement accuracy, a dispersant supplied in dose levels from 12 to 24 mg/g, has confined the pHiep to a relatively narrow range. A capillary suction time technique has been tried for evaluation of suspension fluidity as function of dispersant concentration and pH. For the dispersant stabilised suspensions, a correlation between their CST and pHiep has been documented [less ▲]

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See detailCharacterisation of B1 metallo-beta-lactamase inhibition by VHHs
Sohier, Jean ULg; Laurent, Clémentine ULg; Chevigné, Andy et al

Poster (2010)

Detailed reference viewed: 44 (21 ULg)
See detailCharacterisation of bacteriocins from lactic acid bacteria
Dortu, C.; Franz, C.; Kostinek, M. et al

Poster (2006, September)

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See detailCharacterisation of bio-insecticide proteins in industrial residues from pea seeds (Pisum sativum L.)
Cuertero Diaz, Gaetan; Colinet, Frederic; Portetelle, Daniel ULg et al

in Abstract book (2006)

Detailed reference viewed: 26 (6 ULg)
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See detailCharacterisation of camel breeding practices in the Ansongo Region, Mali
Traoré, Bakary ULg; Moula, Nassim ULg; Touré, Abdoulaye ULg et al

in Tropical Animal Health and Production (2014), 46

Despite its importance in Mali’s economy, camel breeding in the country remains poorly documented, impeding effective policy-making in this regard. This study consisted in a 3-month survey and aimed at ... [more ▼]

Despite its importance in Mali’s economy, camel breeding in the country remains poorly documented, impeding effective policy-making in this regard. This study consisted in a 3-month survey and aimed at characterising camel breeding systems in Ansongo, in the region of Gao, Mali. It highlights the diversity of strategies adopted by breeders and their evolutions. Supplementary feeding and veterinary care were seldom practised. In zones close to the Niger River, cattle were substituted to camels. Transhumance routes also are modified but mobility keeps its vital role in the breeding system. Important differences within the study region in the classification of camel breeds have been reported that will influence the implementation of a collective action for animal genetic improvement. The improvement goals should take the actual management, including mobility and the mixed nature of the herds into account. [less ▲]

Detailed reference viewed: 46 (24 ULg)
See detailCharacterisation of cyclicity and relative sea-level fluctuations using magnetic susceptibility, Late Devonian (Frasnian) Hull platform, Canning Basin, Australia.
Da Silva, Anne-Christine ULg; George; Chow et al

in Whalen; Osadetz; Richards (Eds.) et al IGCP-580/596, Geophysical and Geochemical techniques : a window on the Paleozoic world, Abstract book (2013)

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See detailCharacterisation of different inulin samples by DSC - Influence of polymerisation degree on melting temperature
Blecker, Christophe ULg; Chevalier, J. P.; Fougnies, C. et al

in Journal of Thermal Analysis & Calorimetry (2003), 71(1), 215-224

Melting behaviour of powder inulin has been studied by differential scanning calorimetry. DSC curves show two endothermic peaks, relative to water elimination and to inulin melting, respectively. The ... [more ▼]

Melting behaviour of powder inulin has been studied by differential scanning calorimetry. DSC curves show two endothermic peaks, relative to water elimination and to inulin melting, respectively. The second peak is dependent on inulin type and a shift to a higher temperature is observed with increasing average polymerisation degree (DP) of the sample. For similar crystallinity index, linear relations have been underlined and so predicting inulin mean DP can be done by DSC analysis. The study shows that a relatively high heating rate (25degreesC min(-1)) can be used and brings a supplementary interest by an important reduction of analysis time. [less ▲]

Detailed reference viewed: 88 (19 ULg)
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See detailCharacterisation of disks around YSOs with GENIE
Kaltenegger, Lisa; Absil, Olivier ULg; Eiroa, Carlos et al

in Fridlund, Malcolm; Henning, Thomas (Eds.) Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets (2003, October 01)

Recent interferometric observations show that the interfered near-IR size of the circumstellar material around Young Stellar Object (YSO) are larger than those expected from accretion disk models. There ... [more ▼]

Recent interferometric observations show that the interfered near-IR size of the circumstellar material around Young Stellar Object (YSO) are larger than those expected from accretion disk models. There are currently different models that account for the excess IR emission of Young Stellar Objects (YSO). At the same time, the answers to many questions on the evolutionary status and the origin of the activity and variability depend critically on the relative importance of circumstellar distribution of material in disks or envelopes at different spatial scales. Operating at mid-infrared wavelengths, the Ground-based European Nulling Interferometer Experiment (GENIE) will be particularly sensitive to warm circumstellar dust and will thus provide the opportunity to characterize dust disks around YSOs. Observations with GENIE will enable us to investigate the properties of the circumstellar dust, which are responsible for the excess near-infrared fluxes. The nulling of the central star will bring out the disk in much more detail and hence put stronger constraints on these models. [less ▲]

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See detailCharacterisation of fengycin homologues produced by B. amyloliquefaciens (ET) strain isolated from a salt lake (Eastern Algeria)
Ait Kaki, Asma ULg; Noreddine, K.C.; Kara Ali, M. et al

Poster (2013, November 15)

Detailed reference viewed: 31 (9 ULg)