Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Peer Reviewed
See detailDifferences in Experimental Virulence of Bovine Viral Diarrhoea Viral Strains Isolated from Haemorrhagic Syndromes
Hamers, C.; Couvreur, B.; Dehan, Pierre ULg et al

in Veterinary Journal (2000), 160(3), 250-8

In the late 1980s, a new hypervirulent and epidemic form of bovine viral diarrhoea virus (BVDV) infection appeared in North America. A similar but sporadic syndrome was later reported in Europe. To ... [more ▼]

In the late 1980s, a new hypervirulent and epidemic form of bovine viral diarrhoea virus (BVDV) infection appeared in North America. A similar but sporadic syndrome was later reported in Europe. To compare the pathogenic characters of the North American and European hypervirulent strains, we inoculated BVDV naive calves with BVDV strains isolated from haemorrhagic syndromes originating in Belgium, France and the USA. The experimental procedure comprised daily clinical examination and measurement of blood and virological parameters.The American BVD890/256 strain induced severe thrombocytopaenia, profuse diarrhoea and pneumonia in all calves, indicating that hypervirulent BVDV could be the primary infectious agent of pneumonia. Interestingly, a strong correlation was observed between the intense viraemia and a decreased platelet count. None of the European strains tested induced significant pathological signs, although isolated from cases presenting haemorrhagic syndrome. [less ▲]

Detailed reference viewed: 14 (3 ULg)
Full Text
See detailDifferences in glucosinolate degradation products related to aphid and Brassicaceae host plant myrosinases
Francis, Frédéric ULg; Wathelet, Jean-Paul ULg; Lognay, Georges ULg

Poster (2001)

Studies on chemical ecology of host plant selection by herbivores were largely carried out to explain the diversity of secondary plant chemicals and host specialisation of herbivores. The glucosinolate – ... [more ▼]

Studies on chemical ecology of host plant selection by herbivores were largely carried out to explain the diversity of secondary plant chemicals and host specialisation of herbivores. The glucosinolate – isothiocyanate system in Brassicaceae plants was considered as a plant defence and was known to influence the feeding behaviour of phytophagous insects such as the cabbage aphid, Brevicoryne brassicae. Purified myrosinases from the latter and from white mustard, Sinapis alba, were used to hydrolyse two glucosinolate compounds. Identification of the degradation products, mainly isothiocyanates, was performed by gas chromatography – mass spectrometry. While sinigrin hydrolysis gave identical isothiocyanates for insect and plant enzymes, B. brassicae myrosinase showed a particular activity toward sinalbin. A lost of an hydroxy group was observed for the two latter substrates related products when compared to the S. alba enzymatic specificity. Aphid and plant myrosinases have different properties and specificities which can be discussed in relation to a co-evolution approach. [less ▲]

Detailed reference viewed: 13 (4 ULg)
Full Text
See detailDifferences in glucosinolate degradation products related to aphid and Brassicaceae host plant myrosinases
Francis, Frédéric ULg; Wathelet, Jean-Paul ULg; Lognay, Georges ULg

in GCIRC Bulletin (2001)

Studies on chemical ecology of host plant selection by herbivores were largely carried out to orplain the diversity of secondary plant chemicals and host specialisation of herbivores. The glucosinolate ... [more ▼]

Studies on chemical ecology of host plant selection by herbivores were largely carried out to orplain the diversity of secondary plant chemicals and host specialisation of herbivores. The glucosinolate - isothiocyanate system in Brassicaceae plants was considered as a plant defence and was known to influence the feeding behaviour of phytophagous insects such as the cabbage aphid, Brevicoryre brassicae. Purified m5nosinases from the latter and from white mustard, Sinqis alba, were used to hydrolyse two glucosinolate compounds. Identification of the degradation products, mainly isothiocyanates, was perficrmed by gas chromatography - mass spectromeûy. While sinigdn hydrolysis gave identical isothiocyanates for insect and plant enzymes, B. brassicae myrosinase showed a particular activity toward sinalbin A lost of an hydrory group was obsen'red for the two latter substrates related products when compared to the S. alba enzymatic specificity. Aphid and plant myrosinases have different properties and specificities which can be discussed in relation to a co-evolution approach. [less ▲]

Detailed reference viewed: 53 (8 ULg)
Full Text
Peer Reviewed
See detailDifferences in local versus systemic TNF alpha production in COPD: inhibitory effect of hyaluronan on LPS induced blood cell TNF alpha release
Dentener, M. A.; Louis, Renaud ULg; Cloots, R. H. E. et al

in Thorax (2006), 61(6), 478-484

Background: Chronic obstructive pulmonary disease (COPD) is characterised by both airway inflammation and systemic changes. To elucidate the relationship between local and systemic inflammation, tumour ... [more ▼]

Background: Chronic obstructive pulmonary disease (COPD) is characterised by both airway inflammation and systemic changes. To elucidate the relationship between local and systemic inflammation, tumour necrosis factor alpha (TNF alpha) production by sputum cells and blood cells of patients with COPD and controls was compared and the effect of the extracellular matrix compound hyaluronan (HA) on TNF alpha release was studied. Methods: Four study groups were included: 10 steroid free COPD patients, 8 steroid treated patients, 10 healthy smokers, and 11 healthy non-smokers. Sputum cells and blood were incubated for 24 hours with or without lipopolysaccharide (LPS) in the absence or presence of HA (122 kDa or HMW fragment). TNF alpha was measured by ELISA. Results: Sputum cells produced spontaneously high levels of TNF alpha but were unresponsive to LPS. Sputum cells from COPD patients (both steroid free and steroid treated) produced significantly less TNF alpha than cells from healthy non-smoking subjects (p = 0.017 and p = 0.001, respectively). In contrast, blood cells produced TNF alpha only in response to LPS. No differences were observed in TNF alpha production by blood cells between the patient groups and the control groups. HA (both fragments) partially blocked LPS (1 ng/ml) induced TNF alpha release by blood cells from all study groups, whereas TNF alpha production by sputum cells was not influenced by HA. Conclusion: These data indicate a difference between local and systemic TNFa production. Sputum cells of patients with COPD produced less TNFa than controls, which could contribute to impaired local defence. An inhibitory effect of HA on TNF alpha release in blood cells was observed which was similar in both patients and controls. [less ▲]

Detailed reference viewed: 58 (4 ULg)
Full Text
Peer Reviewed
See detailDifferences in locomotor activity in two syntopic spadefoot toad species (genus Pelobates)
Székely, Diana; Denoël, Mathieu ULg; Székely, Paul et al

Poster (2013, August 25)

Detailed reference viewed: 81 (6 ULg)
Full Text
Peer Reviewed
See detailDifferences in neural activation following expression of appetitive and consummatory male sexual behavior in the quail brain
Taziaux, Mélanie ULg; Cornil, Charlotte ULg; Dejace, C. et al

in Hormones & Behavior (2005, June), 48(1), 130

Detailed reference viewed: 20 (4 ULg)
Full Text
Peer Reviewed
See detailDifferences in perceptions and evaluation criteria among groups influencing industrial buying decisions
Choffray, Jean-Marie ULg; Lilien, Gary L.

in Maloney, J.; Silverman, B. (Eds.) Attitude Research Plays for High Stakes (1979)

The measurement of perceptual and evaluation differences among groups of individuals involved in organizational buying provides new input for product positioning and for communications strategies. This ... [more ▼]

The measurement of perceptual and evaluation differences among groups of individuals involved in organizational buying provides new input for product positioning and for communications strategies. This paper provides a non technical overview of a measurement and analysis methodology aimed at treating these group differences and using the results to develop relevant marketing strategies. [less ▲]

Detailed reference viewed: 21 (1 ULg)
Peer Reviewed
See detailDifferences in serum trace elements concentration in osteoporotic and age-matched comparison patients: preliminary results
Strause, LG; Reginster, Jean-Yves ULg; Franchimont, P et al

in Journal of Bone and Mineral Research (1986), 1(S1), 234

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
See detailDifferences in species–area relationships among the major lineages of land plants: a macroecological perspective
Patino Llorente, Jairo ULg; Weigelt, P.; Guilhaumon, F. et al

in Global Ecology & Biogeography (2014), 23

Detailed reference viewed: 69 (13 ULg)
Full Text
Peer Reviewed
See detailDifferences in Strength and Timing of the mtDNA Bottleneck between Zebrafish Germline and Non-germline Cells.
Otten, Auke BC; Theunissen, Tom EJ; Derhaag, Josien G et al

in Cell Reports (2016)

We studied the mtDNA bottleneck in zebrafish to elucidate size, timing, and variation in germline and non-germline cells. Mature zebrafish oocytes contain, on average, 19.0 3 106 mtDNA molecules with high ... [more ▼]

We studied the mtDNA bottleneck in zebrafish to elucidate size, timing, and variation in germline and non-germline cells. Mature zebrafish oocytes contain, on average, 19.0 3 106 mtDNA molecules with high variation between oocytes. During embryo- genesis, the mtDNA copy number decreases to $170 mtDNA molecules per primordial germ cell (PGC), a number similar to that in mammals, and to $50 per non-PGC. These occur at the same developmental stage, implying considerable variation in mtDNA copy number in (non-)PGCs of the same female, dictated by variation in the mature oocyte. The pres- ence of oocytes with low mtDNA numbers, if similar in humans, could explain how (de novo) mutations can reach high mutation loads within a single gener- ation. High mtDNA copy numbers in mature oocytes are established by mtDNA replication during oocyte development. Bottleneck differences between germ- line and non-germline cells, due to early differentia- tion of PGCs, may account for different distribution patterns of familial mutations. [less ▲]

Detailed reference viewed: 10 (3 ULg)
Full Text
Peer Reviewed
See detailDifferences in the structural and magnetic properties of nanosized barium hexaferrite powders prepared by single and double microemulsion techniques
Koutzarova, T.; Kolev, S.; Ghelev, Ch et al

in Journal of Alloys & Compounds (2013), 579

Barium hexaferrite powders of nanometer particle size synthesized via two variants of the microemulsion technique, namely, single microemulsion and double microemulsion, were studied. The influence was ... [more ▼]

Barium hexaferrite powders of nanometer particle size synthesized via two variants of the microemulsion technique, namely, single microemulsion and double microemulsion, were studied. The influence was explored of the type of microemulsion technique on the microstructure and on the magnetic properties of the barium hexaferrite powders. The average particle size of the barium hexaferrite powders was in the range from 110 nm to 442 nm depending on the method and conditions of synthesis. The particles with size below 150 nm had irregular shapes between spherical and platehexagonal; the bigger ones had an almost perfect hexagonal shape. The powders obtained by single microemulsion had better magnetic characteristics (saturation magnetization of 65.12 emu/g and coercivity field of 3.6 × 105 A/m) than those obtained by double microemulsion. © 2013 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 29 (4 ULg)
See detailDifférences individuelles et effets d'agrégation en ce qui concerne les performances en lecture : Analyse secondaire des données PISA 2000
Crahay, Marcel ULg; Monseur, Christian ULg

in Houssemand, C.; Martin, R.; Dickes, P. (Eds.) Perspectives de psychologie différentielle (2006)

Detailed reference viewed: 61 (6 ULg)
See detailDifférences interindividuelles dans la propension aux faux souvenirs
Willems, Sylvie ULg; Van der Linden, Martial ULg

in Brédart, Serge (Ed.) Souvenirs récupérés, souvenirs oubliés et faux souvenirs (2004)

Detailed reference viewed: 72 (9 ULg)
Full Text
See detailDifférences intra- et inter-races du profil en acides gras du lait
Soyeurt, Hélène ULg; Dardenne, Pierre; Lognay, Georges ULg et al

in 11ème Carrefour des Productions Animales (2006, January 25)

Detailed reference viewed: 38 (6 ULg)
See detailDifférences liées au sexe : l'école en relation avec son environnement
Lafontaine, Dominique ULg; Blondin, Christiane ULg

in Actes du XVIe colloque international de l'Admée-Europe, Liège, 4-6 septembre 2003 (2004)

Detailed reference viewed: 61 (5 ULg)
See detailLes différences sexuées dasn les trajectoires professionnelles. A qui la faute ?
Gavray, Claire ULg

Conference given outside the academic context (2005)

Detailed reference viewed: 23 (3 ULg)