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See detailOccurrence of aphid predators in Belgian agro-ecosystems
Vandereycken, Axel ULg; Durieux, Delphine ULg; Joie, Emilie ULg et al

Poster (2011, March 06)

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See detailOccurrence of cardiovascular calcifications in normal, aging rats.
Roosens, B; Bala, G; Droogmans, S et al

in Experimental Gerontology (2012), 47(8), 614-9

BACKGROUND: Cardiovascular calcification is an independent predictor of morbidity and mortality and increases with age. Animal models are frequently used to investigate the underlying pathophysiology ... [more ▼]

BACKGROUND: Cardiovascular calcification is an independent predictor of morbidity and mortality and increases with age. Animal models are frequently used to investigate the underlying pathophysiology. Only scarce data regarding the effect of aging on calcifications in these animal models are available. The aim of this study is to investigate the occurrence of cardiovascular calcifications in normal, aging rats. METHODS: A mixed inbred/outbred population of 44 male Lewis/Wistar rats was studied. Group 1 of three-month-old rats, group 2 twelve-month-old, group 3 twenty-four-month-old and group 4 thirty-month-old rats. Calibrated integrated backscatter (cIB) values and blood parameters (creatinine, parathyroid hormone (PTH)) were measured, followed by ex-vivo micro-CT and histology as reference methods. RESULTS: Cardiovascular calcifications developed with age, as demonstrated by significantly increasing cIB values of the aortic valve and myocardium. This was confirmed by a significant increase in the calcified volume on ex-vivo micro-CT and in the histological calcium score. There was also a significantly higher level of creatinine and PTH with age. CONCLUSIONS: As in humans, cardiovascular calcifications progressively increase with age in the normal rat. Therefore the aging rat model could be used for studying calcifying cardiovascular disease. cIB might have a value in future studies for the early detection of subclinical calcifications in humans. [less ▲]

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See detailOccurrence of contrasting skarn formations in dolomites of the Traversella deposit (Ivrea, Italy)
Vander Auwera, Jacqueline ULg; Verkaeren, Jean

in Geologische Rundschau : Zeitschrift für Allgemeine Geologie (1993), 82

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See detailOccurrence of D-alanyl-(D)-meso-diaminopimelic acid and meso-diaminopimelyl-meso-diaminopimelic acid interpeptide linkages in the peptidoglycan of Mycobacteria
Wietzerbin, Juana; Das, Bhupsh C.; Petit, Jean-François et al

in Biochemistry (1974), 13(17), 3471-3476

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See detailOccurrence of equine coital exanthema in mares from an embryo transfer center
Barrandeguy, Maria; Perkins, Julio; Mac Donough, Jorge et al

in Journal of Equine Veterinary Science (2010), 30

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See detailOccurrence of glucomuramic acid in gram-positive bacteria
Wheat, R.-W.; Ghuysen, Jean-Marie ULg

in Journal of Bacteriology (1971), 105(3), 1219-1221

Analyses of 48 gram-positive bacteria indicate only glucomuramic acid and no galactomuramic acid in cell walls.

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See detailOccurrence of Harmonia axyridis (Coleoptera: Coccinellidae) in field crops
Vandereycken, Axel ULg; Brostaux, Yves ULg; Joie, Emilie ULg et al

in European Journal of Entomology (2013), 110(2),

Abstract. The Multicoloured Asian Ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae) is known to thrive principally in shrubby and arboreal habitats. This study focuses on the occurrence of ... [more ▼]

Abstract. The Multicoloured Asian Ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae) is known to thrive principally in shrubby and arboreal habitats. This study focuses on the occurrence of this exotic species and its seasonal abundance in various field crops. The abundance of adults, larvae and pupae of H. axyridis was evaluated over a three-year period, from 2009 to 2011, in four important agronomical crops (wheat, corn, broad bean and potato) in Belgium. From May to September, 48 1-m² quadrats were visually inspected in each of the fields sampled on several farms every seven days. H. axyridis colonized and reproduced in all of the four crops studied, with the largest numbers recorded in corn and broad bean crops. Larvae and adults of H. axyridis were recorded mainly in corn and to a much less extent in wheat and potato crops. From 2009 to 2011, the mean weekly abundance of H. ayxridis remained constant except in corn crops, where the recorded densities of all the immature stages and adults were higher in 2011 than in 2009. The population dynamics of aphids and H. axyridis are well described by a symmetric logistic function (S-shape) of cumulative population size. H. axyridis was not always recorded where aphids were abundant, e.g. aphids were abundant on wheat where no H. axyridis were recorded. H. axyridis start reproducing after the peak in aphid population, suggesting that H. axyridis is able to complete its development by feeding on alternative prey such as larvae and pupae of the same and other species of ladybird and other aphidophagous species. H. axyridis is often considered to be bivoltine but it only completes one generation per year in field crops. The second generation generally develops late in the season in other habitats. [less ▲]

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See detailOccurrence of MRSA endocarditis during linezolid treatment
Ben Mansour, El Hassan; Jacob, Eric; Monchi, Mehran et al

in European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology (2003), 22(6), 372-373

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See detailThe occurrence of multicolored ladybird, Harmonia axyridis Pallas, a biological control agent in agroecosystems in Wallonia
Vandereycken, Axel ULg; Durieux, Delphine ULg; Haubruge, Eric ULg et al

Conference (2010, May 18)

The Asian ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae), was imported in 1997 in Belgium to control aphid populations in greenhouses. It took only few years to the insect to get adapted ... [more ▼]

The Asian ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae), was imported in 1997 in Belgium to control aphid populations in greenhouses. It took only few years to the insect to get adapted to temperate climate conditions and to spread out all over Europe. Now, H. axyridis is one of the coccinellid with the biggest size in Belgium, causing damages to the ecosystems through e.g. intraguild predation (IGP). We are still lacking information about the consequences of the introduction of this superpredator in our agro-ecosystems. This work focuses on the potential impacts of H. axyridis on the entomofauna associated with several crops (potatos, corn, wheat, broad bean). We evaluated in 2009 the occurrence as well as the interactions between aphids and their natural enemies (hoverflies, coccinellids and lacewings) in several agro-ecosystem sites in northern Wallonia. After one year of field observations, were found thirteen coccinellid species, most of the catched individuals being H. axyridis with 64% of the coccinellids, Propylea 14-punctata, 15%, or Coccinella 7-punctata, 14%. This invasive ladybird dominates the group of coccinellids generally in all crops in north Wallonia. The results with the sticky traps show that the maximum occurrence of H. axyridis in crops is observed in chicory, sugar beet and potatoes. The relationship aphid-ladybird in wheat for example, brings out that increase of density of Asian ladybird in mid-July follow the increase of aphids (Sitobion avenae, Sitobion fragariae, Metopolophium dirhodum, Aphis fabae) in the end of June. We also observe that, in most agro-ecosystems, hoverflies and lacewings are the dominant aphid natural enemies. In all crops investigate, the multicolored ladybird occurs with 5% of the aphidophagous after the Chrysopidae, 12% and the Syrphidae, 76%. In 2009, the agro-ecosystems with the most aphidophagous species are carrot and broad bean and these habitats are dominated by hoverflies. [less ▲]

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See detailOccurrence of N-glycolylmuramic acid in bacterial cell walls: a preliminary survey
Azuma, I.; Thomas, D. W.; Adam, A. et al

in Biochimica et Biophysica Acta - General Subjects (1970), 208(3), 444-451

The N-acyl substituent of muramic acid in the cell walls of some species of Actinomycetales and of the related family of Corynebacteriaceae has been studied. The N-glycolyl derivative, recently identified ... [more ▼]

The N-acyl substituent of muramic acid in the cell walls of some species of Actinomycetales and of the related family of Corynebacteriaceae has been studied. The N-glycolyl derivative, recently identified in Mycobacterium smegmatis, has been found in the three other species of Mycobacterium studied: M. kansasii, M. tuberculosis BCG, and M. phlei. The classical N-acetyl derivative has been found in Streptomyces albus and Corynebacterium fermentans. [less ▲]

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See detailOccurrence of perfluorooctane sulfonate and other perfluorinated alkylated substances in harbor porpoises from the Black Sea
Van de Vijver, Kristin Inneke; Holsbeek, Ludo; Das, Krishna ULg et al

in Environmental Science & Technology (2007), 41(1), 315-320

Perfluorooctane sulfonate (PFOS) and other perfluorinated alkylated substances (PFAS) were determined in liver, kidney, muscle, brain, and blubber samples of 31 harbor porpoises (Phocoena phocoena relicta ... [more ▼]

Perfluorooctane sulfonate (PFOS) and other perfluorinated alkylated substances (PFAS) were determined in liver, kidney, muscle, brain, and blubber samples of 31 harbor porpoises (Phocoena phocoena relicta) of different age and sex stranded along the Ukrainian coast of the Black Sea. In all individuals and in all tissues, PFOS was the predominant PFAS, accounting for on average 90% of the measured PFAS load. PFOS concentrations were the highest in liver (327 +/- 351 ng/g wet wt) and kidney (147 +/- 262 ng/g wet wt) tissue, and lower in blubber (18 +/- 8 ng/g wet wt), muscle (41 +/- 50 ng/g wet wt), and brain (24 +/- 23 ng/g wet wt). No significant differences could be determined between males and females, nor between juvenile and adult animals (p > 0.05). Perfluorononanoic acid, perfluorodecanoic acid, perfluoroundecanoic acid, and perfluorododecanoic acid could be detected in liver tissue of approximately 25% of the individuals. Perfluorobutane sulfonate, perfluorobutanoic acid, and perfluorooctanoic acid were not detected in any of the porpoise livers. Although we investigated a potential intraspecies segregation according to the source of prey, using stable isotopes, no statistically significant correlation between PFOS concentrations and stable isotopes could be determined. It is, however, noteworthy that the contamination by PFOS in the Black Sea harbor porpoises is comparable to levels found in porpoises from the German Baltic Sea and from coastal areas near Denmark and, therefore, might pose a threat to this population. [less ▲]

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See detailOccurrence of polyfunctional thiols in sorghum beer "ikigage" made with Vernonia amygdalina "umubirizi"
Lyumugabe Loshima, François ULg

in Flavour and Fragrance Journal (2012), 27(5), 372-377

Several polyfunctional thiols have been previously identified in beers made from barley and hops. These compounds have not been investigated in beers brewed with non-Western raw materials. Here we have ... [more ▼]

Several polyfunctional thiols have been previously identified in beers made from barley and hops. These compounds have not been investigated in beers brewed with non-Western raw materials. Here we have performed a thiol-specific extraction with p-hydroxymercuribenzoic acid on a traditional ikigage sorghum beer from Rwandese peasants (use of Vernonia amygdalina just for yeast propagation), and on two pilot beers with addition (or not) of V. amygdalina in the boiling kettle, instead of hops. Gas chromatography – olfactometry, gas chromatography –mass spectrometry and gas chromatography with pulsed flame photometric detectionanalyses of the extracts enabledustoidentify 14polyfunctional thiols.The well-known ho pconstituent3-methyl-2-buten-1-thiol emerged as a key flavour in the unhopped beers containing V. amygdalina flavour dilution >262 144). The addition of V. amygdalina during boiling also resulted in the presence of 1-butanethiol, but the production of 2-sulfanylethanol and 2-sulfanylethyl acetate was inhibited. Complementary data are required to understand how V. amygdalina leaves are able to impact upon the Ehrlich pathway leading to cysteine and homocysteine-derived thiols. [less ▲]

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See detailThe occurrence of reworked miospores in a Westphalian C microflora from South Limburg (The Netherlands) and its bearing on paleogeography.
Bless, M.J.M.; Streel, Maurice ULg

in Mededelingen - Rijks Geologische Dienst (1976), 27(1), 1-39

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See detailOccurrence of sulphides on the bornite-idaite join from Vielsalm, Stavelot Massif, Belgium
Hatert, Frédéric ULg

in European Journal of Mineralogy (2003), 15(6, NOV-DEC), 1063-1068

Sulphides with chemical compositions between idaite and bornite have been identified from several quartz veins crosscutting Ordovician schists in Vielsalm, Belgium. Idaite is an oxidation product of ... [more ▼]

Sulphides with chemical compositions between idaite and bornite have been identified from several quartz veins crosscutting Ordovician schists in Vielsalm, Belgium. Idaite is an oxidation product of bornite, and occurs in the more oxidised parts of the quartz veins. The alteration sequence bomite --> "anomalous bornite" --> idaite is observed, associated with the growth of chalcopyrite lamellae parallel to the {100} and {111} directions of precursor bornite. Electron microprobe analyses indicate a chemical composition significantly enriched in Cu, when compared with the ideal composition of idaite, Cu3FeS4, as well as a progressive compositional evolution from bomite to idaite. The X-ray powder pattern is indexed in the space group I (4) over bar 2m, similar to that of stannite, and gives the unit-cell parameters a = 5.279(4) and c = 10.47(2) Angstrom. [less ▲]

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See detailOccurrence of the antibodies against synthetic salmon calcitonin during treatment of the Paget's disease of bone by nasal spray
Reginster, Jean-Yves ULg; Gaspar, S; Franchimont, P

in Journal of Bone and Mineral Research (1986), 1(S1), 348

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See detailOccurrence of the genotype of the receptor gene for ryanodine (Ryr1) associated with sensitivity to stress in 5 Belgian porcine production systems
China, Bernard; Leroy, Bernadette ULg; Dams, Lorène ULg et al

in Annales de Médecine Vétérinaire (2005), 149(3), 161-165

Porcine stress syndrome is related to a point mutation in Ryr1 gene encoding the ryanodin receptor. This syndrome involves mortality after stress conditions or poor quality meat. Five hundred and five ... [more ▼]

Porcine stress syndrome is related to a point mutation in Ryr1 gene encoding the ryanodin receptor. This syndrome involves mortality after stress conditions or poor quality meat. Five hundred and five individuals among 5 Belgian production systems were genotyped. This genotyping was performed by polymerase chain reaction-restriction fragment length polymophism (PCR-RFLP) or real time PCR. The results indicated that 22,4 % of the pigs were stress sensitive (TT genotype) and 77,6 % stress resistant (63,4 % CT heterozygotes and 14,2 % CC genotype). Statistical analysis allowed to split the production systems into two groups: the production system 1 and 2 presenting a high level of TT individuals (44 % and 52 % respectively) although production systems 3, 4 and 5 presented a high level of heterozygotes individuals (74 %, 92 % and 78 % respectively). At the technical level, real time PCR appeared to be a faster and an easier technique than PCR-RFLP. [less ▲]

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See detailThe occurrence of the ilio-lumbar syndrome in a spinal cord injury patient
Chantraine, A.; Bosson, L.; Malaise, Michel ULg et al

in Spinal Cord : The Official Journal of the International Medical Society of Paraplegia (2001), 39(4), 237-239

STUDY DESIGN: Case report of a 71-year-old man having sustained a spinal cord injury (SCI) for 26 years. He started to suffer from low back pain 21 years after his onset and this was diagnosed as ilio ... [more ▼]

STUDY DESIGN: Case report of a 71-year-old man having sustained a spinal cord injury (SCI) for 26 years. He started to suffer from low back pain 21 years after his onset and this was diagnosed as ilio-lumbar syndrome (ILS). OBJECTIVES: To describe the problem of low back pain occurring after a change of wheelchair in a SCI, and to indicate the importance of the ilio-lumbar syndrome as a possible cause of low back complaint. OUTCOME: Clinical findings supported by echotomography confirmed the diagnosis of ILS in our case. CONCLUSION: ILS should be considered when some changes and deterioration of the status of SCI occur due to low back complaint. [less ▲]

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