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See detailIs the noxious Ambrosia artemisiifolia L. going to invade Belgium?
Ortmans, William ULg; Chauvel, Bruno; Mahy, Grégory ULg et al

Poster (2014, February 07)

Ambrosia artemisiifolia L. is an invasive species from North America, causing a health crisis in Europe due to its highly allergenic pollen. In France, there is a zone where the A. artemisiifolia ... [more ▼]

Ambrosia artemisiifolia L. is an invasive species from North America, causing a health crisis in Europe due to its highly allergenic pollen. In France, there is a zone where the A. artemisiifolia populations are naturalized and invasive. Outside this area, populations are more rare and do not seem to expand. We tested if the performances of A. artemisiifolia are varying with competition level, and among geographical zones. The results show that populations from Belgium and Netherlands are not less efficient than invasive populations for the measured traits. [less ▲]

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See detailIs the O2(a1Δg) Venus nightglow emission controlled by solar activity ?
Soret, Lauriane ULg; Gérard, Jean-Claude ULg

in Icarus (2015), 262

Several past studies showed that the O2(a1Δg) Venus nightglow emission at 1.27 μm is highly variable on a timescale of hours. We examine whether the intensity of this emission shows a more global trend ... [more ▼]

Several past studies showed that the O2(a1Δg) Venus nightglow emission at 1.27 μm is highly variable on a timescale of hours. We examine whether the intensity of this emission shows a more global trend linked to solar activity. [less ▲]

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See detailIs the observer effect significant in vegetation assessment of restored metallicolous grassland?
Boisson, Sylvain ULg; Mahy, Grégory ULg

Conference (2016, August 22)

Projects that prospects habitat restoration require protocols of vegetation assessment to monitor the evolution of the restored ecosystems over time. In most cases, multiple assessors are needed and some ... [more ▼]

Projects that prospects habitat restoration require protocols of vegetation assessment to monitor the evolution of the restored ecosystems over time. In most cases, multiple assessors are needed and some studies have shown that the variability among observer can be significant. In the context of tropical grassland, few studies quantified the impact of the observer on the results, reducing the capacity to replicate conclusions, and, therefore to plan restoration strategies at large scale. This study aims to quantify the variation among observers using two phytosociological methods on restored metallicolous grassland and to test whether variation in the assessment could involve the conclusions of the vegetation assessment. Four observers were selected to perform monitoring of quadrats in two distinct habitats identified in four restored ecosystems. All observers sampled seven metrics based on phytosociological methods and two of them also performed a complete vegetation sampling of the quadrat, including species identification and cover in quadrat. For metrics based on cover, variation of measure exists among the observers. For metrics based on counting, no variation is highlighted and the observers are able to distinguish and identify species. These results emphasize that a same method could lead to distinct results according to observer and, in restoration projects, it is crucial to ensure a correct transfer of protocols of vegetation assessment in order to reproduce equally the method. [less ▲]

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See detailIs the PASAT enough to detect working memory problems in MS patients? A comparison with another working memory test
DELRUE, Gaël ULg; MOYANO, Nicolas; JIMENEZ et al

Poster (2011)

We show that the PASAT is not the best test to evaluate working memory in mulitple sclerosis patients.

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See detailIs the pion a Klein-Gordon particle?
Bawin, Michel ULg; Jaminon, Martine ULg

in Zeitnitz, B. (Ed.) few Body Problems in Physics, vol II (1984)

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See detailIS THE PRESENCE OF MESOTROPHIC PLANT-COMMUNITIES IN THE PEAT-BOGS OF HAUTES-FAGNES (BELGIUM) CONNECTED WITH TONALITE INTRUSIONS IN THE REVINIAN LAYERS
Hambuckers, Alain ULg; Schumacker, René ULg; Remacle, Jean ULg et al

in Belgian Journal of Botany (1995), 128(1), 48-56

Within the Hautes-Fagnes Nature Reserve (Belgium) acidic and oligotrophic biotopes are developing on very acidified stony silt raised bogs. However, they are locally dominated by mesotrophic species ... [more ▼]

Within the Hautes-Fagnes Nature Reserve (Belgium) acidic and oligotrophic biotopes are developing on very acidified stony silt raised bogs. However, they are locally dominated by mesotrophic species. Based on the fact that there are several outcrops of tonalite in the region and particularly one in the Nature Reserve, a hypothesis to explain these singularities of the vegetation implies discontinuities of the bedrock provoked by intrusions of this magmatic rock in the Revinian layer covering the region. Seventeen plots containing Phragmites australis were examined and vegetation was described. Silt and soil water were sampled and analyzed for mineral contents in 15 sites. The differences of mineral composition between the P. australis plots and their surrounding environment confirmed the more mesotrophic characteristics of these plots (i.e. higher pH, higher Ca and Mg contents, lower Al content). However, the lower Zn, Pb and Fe contents would lead to reject the hypothesis of intrusions of tonalite since these elements are more abundant in the tonalite and its mineralization than in the Revinian rock. Nevertheless, the overall ecological conditions of the examined plots and the differences of plant species composition suggested that the observed chemical environment could be evoked for explaining the distribution of the mesotrophic species in the oligotrophic environment of the Nature Reserve. Consequently, an alternative hypothesis is proposed. [less ▲]

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See detailIs the quantity maxim strategy child-specific ?
Brédart, Serge ULg

in Journal of Child Language (1987), 14

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See detailIs the Sino-Nasal Outcome Test-22 a suitable evaluation for septorhinoplasty?
POIRRIER, Anne-Lise ULg; Ahluwalia, Suki; Goodson, Alexander et al

in The Laryngoscope (2013), 123(1), 76-81

OBJECTIVES/HYPOTHESIS: It is becoming increasingly important for clinicians to demonstrate the impact of their interventions. The Sino-Nasal Outcome Test-22 (SNOT-22) questionnaire is a disease-specific ... [more ▼]

OBJECTIVES/HYPOTHESIS: It is becoming increasingly important for clinicians to demonstrate the impact of their interventions. The Sino-Nasal Outcome Test-22 (SNOT-22) questionnaire is a disease-specific questionnaire involving 22 symptoms combining rhinologic issues with general health issues. We evaluated the SNOT-22 score as a quality-of-life outcome measure in septorhinoplasty surgery. STUDY DESIGN: Outcome research. METHODS: We carried out a prospective case series in 76 patients undergoing septorhinoplasty. Their SNOT-22 scores were compared pre- and postoperatively. We also recorded individual symptom scores to study the impact of surgery. To check its reliability, the SNOT-22 score was correlated to patient-reported symptoms on a visual analogue scale. Patients were screened for comorbid conditions. Interactions with the surgical technique and/or with the initial sinonasal disease were sought. RESULTS: The SNOT-22 is a reliable and responsive outcome measure in septorhinoplasty surgery. Septorhinoplasty was especially effective at addressing nasal obstruction, discharge, olfaction, related sleep disturbance, and emotional symptoms such as embarrassment or frustration. Comparison to the visual analogue scale instrument confirmed the outcome measured by the SNOT-22. CONCLUSIONS: The SNOT-22 could be used in routine clinical practice to highlight the impact of nasal disease in each patient and to measure the outcome and the effectiveness of the surgical intervention. [less ▲]

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See detailIs the Sorensen test really a fatigue task for trunk extensor muscles?
Demoulin, Christophe ULg; Boyer, M.; GROSDENT, Stéphanie ULg et al

in Abstract book of the 8th Interdisciplinary World Congress on Low Back and Pelvic Pain (2013, October)

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See detailIs the sword moss (Bryoxiphium) a preglacial Tertiary relict?
Patino, J.; Goffinet, B.; Sim-Sim, M.A. et al

in Molecular Phylogenetics & Evolution (2016), 96

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See detailIs the Sørensen test valid to assess muscle fatigue of the trunk extensor muscles?
Demoulin, Christophe ULg; Boyer, Mathieu; Duchateau, Jacques et al

in Journal of Back and Musculoskeletal Rehabilitation (2016), 00

BACKGROUND: Very few studies have quantified the degree of fatigue characterized by the decline in the maximal voluntary contraction (MVC) force of the trunk extensors induced by the widely used Sørensen ... [more ▼]

BACKGROUND: Very few studies have quantified the degree of fatigue characterized by the decline in the maximal voluntary contraction (MVC) force of the trunk extensors induced by the widely used Sørensen test. OBJECTIVE: Measure the degree of fatigue of the trunk extensor muscles induced by the Sørensen test. METHODS: Eighty young healthy subjects were randomly divided into a control group (CG) and an experimental group (EG), each including 50% of the two genders. The EG performed an isometric MVC of the trunk extensors (pre-fatigue test) followed by the Sørensen test, the latter being immediately followed by another MVC (post-fatigue test). The CG performed only the preand post-fatigue tests without any exertion in between. RESULTS: The comparison of the pre- and post-fatigue tests revealed a significant (P <0.05) decrease in MVC force normalized by body mass (−13%) in the EG, whereas a small increase occurred in the CG (+2.7%, P = 0.001). CONCLUSIONS: This study shows that the Sørensen test performed until failure in a young healthy population results in a reduced ability of the trunk extensor muscles to generate maximal force, and indicates that this test is valid for the assessment of fatigue in trunk extensor muscles. [less ▲]

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See detailIs the triggering of Kainama landslide (Kyrgyzstan, 2004) related to seismic shaking, groundwater flow or a combination of both ?
Bourdeau, Céline; Havenith, Hans-Balder ULg

in Geophysical Research Abstracts (2007, April)

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See detailIs the venice lagoon noisy? First passive listening monitoring of the venice lagoon: Possible effects on the typical fish community
Bolgan, Marta ULg; Picciulin, Marta; Codarin, Antonio et al

in Advances in Experimental Medicine and Biology (2016)

Three passive listening surveys have been carried out in two of the three Venice lagoon tide inlets and inside the Venice island. The spectral content and the intensity level of the underwater noise as ... [more ▼]

Three passive listening surveys have been carried out in two of the three Venice lagoon tide inlets and inside the Venice island. The spectral content and the intensity level of the underwater noise as well as the presence or absence of Sciaena umbra and the distribution of its different sound patterns have been investigated in all the recording sites. The passive listening proved to be successful in detecting S. umbra drumming sounds in both Venice lagoon tide inlets. Our results indicate that the spectral content and the level of underwater noise pollution in the Venice lagoon could affect fish acoustic communication. © Springer Science+Business Media New York 2016. [less ▲]

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See detailIs the western lowland gorilla a good gardener ? Evidence for directed dispersal in Southeast Gabon
Haurez, Barbara ULg; Brostaux, Yves ULg; Petre, Charles-Albert ULg et al

in Bois et Forêts des Tropiques (2015), 324(2), 39-50

In Central African tropical forests, the western lowland gorilla deposits most of the seeds it disperses in well-lit nesting sites that can favour seedling growth. The faecal matrix surrounding the seeds ... [more ▼]

In Central African tropical forests, the western lowland gorilla deposits most of the seeds it disperses in well-lit nesting sites that can favour seedling growth. The faecal matrix surrounding the seeds can act as a fertiliser and further enhance seedling development. This fertilisation effect had never been tested. Our research therefore aimed to determine whether seed deposition by gorillas (i) in faecal matter and (ii) in nest sites is advantageous for seedling development (growth rate and foliation rate) and survival (% of surviving seedlings). To assess the effect of the faecal matrix, seeds of Santiria trimera (Burseraceae), Chrysophyllum lacourtianum (Sapotaceae) and Plagiostyles africana (Euphorbiaceae) collected from gorilla faeces were sown in a nursery with and without a faecal matrix. Seedlings of Santiria trimera and Dacryodes normandii (Burseraceae) were established in nest sites and in closed canopy terra firme forest sites to assess the impact of seed deposition on seedling development and survival. The faecal matrix was observed to positively influence seedling development in the species studied, but showed no effect on survival. Regarding seed deposition sites, the development rates observed were two to ten times higher in the nest sites than in closed-canopy forest. This enhanced seedling development was positively correlated with canopy openness. In situ studies of seed germination, seedling growth and survival are needed to characterise the fate of gorilla-dispersed seeds more precisely. However, our results offer evidence that gorillas provide important directed dispersal services by depositing seeds most frequently in open canopy sites. [less ▲]

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See detailIs the western population of the European mink, (Mustela lutreola), a distinct Management Unit for conservation?
Michaux, Johan ULg; Libois, Roland ULg; Davison, A. et al

in Biological Conservation (2004), 115(3), 357-367

The European mink (Mustela lutreola) is one of the most threatened carnivores in Europe, with fragmented populations in Belarus. Russia and Romania, as well in south-western France and northern Spain ... [more ▼]

The European mink (Mustela lutreola) is one of the most threatened carnivores in Europe, with fragmented populations in Belarus. Russia and Romania, as well in south-western France and northern Spain. Many populations have become extinct recently, or are declining. We investigated mitochondrial DNA variation, using the complete D-loop region, and concentrating oil the west European population. The aim was two-fold: to use the genetic information to advise on the conservation of European mink, and to begin to understand their history through the Pleistocene. Captive breeding and re-introduction programmes are underway, so it is particularly vital to know whether the West European population should be treated separately. We find that European mink probably colonised from a single refugium after the last glaciation. West European populations may be fixed for a single haplotype. also suggesting a common origin. Despite this evidence for gene flow, following the precautionary principle we suggest that mink from the three geographically separate populations (Romania, Eastern and Western Europe) should be managed separately, for the moment. (C) 2003 Elsevier Ltd. All rights reserved. [less ▲]

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See detailIs the wheat distillers grains soluble ProtiWanze a valuable alternative to soybean and canola meals in beef cattle diet?
Lessire, Françoise ULg; Rollin, Frédéric ULg

in ICPD (Ed.) Book of Abstracts (2013, June 24)

The objective of this study was to evaluate whether introducing the condensed wheat distillers soluble ProtiWanze® (PW) in diets of beef cattle has an impact on feeding costs, health and production of the ... [more ▼]

The objective of this study was to evaluate whether introducing the condensed wheat distillers soluble ProtiWanze® (PW) in diets of beef cattle has an impact on feeding costs, health and production of the animals. PW by-product from a Belgian bio-ethanol plant which utilized only wheat without bran, is an acid (pH=4) liquid feed rich in energy (VEM= 1130) and protein (TP= 282 mg/kg DM). PW supplementation from 9 to 13% on DM basis has been tested in 4 suckler cows’ farms for 4 months in 2011 and 2012. In 2011, 2 BB (H1 and H3) and 1 Blonde d’Aquitaine (H2: 23 cows) herds were evaluated and in 2012, the Blonde d’Aquitaine herd was replaced by a third BBB herd (H4: 42 cows). Every month, animals’ health and production were checked by the mean of Body Condition Score, Ruminal Fill, Fecal Consistency, Undigested Fraction and Locomotion Scores determination, as described by Zaaier et al.(2001) and Sprecher et al.(1997). Ruminal fluid was sampled by a stomach tube (Ruminator®) on 5 cows for pH, redox potential (Methylene blue test) and protozoa assessment (optical microscopy). Reproduction performances of this 2 year’s-period were analyzed. Price of a diet containing the same amount of proteins brought by a mixture of 1/3 soybean and 2/3 canola meal was calculated to verify whether introducing PW reduced feeding costs. Whatever the concentration of PW used, no adverse effect has been observed concerning reproduction, production performance, ruminal pH. Feeding costs were reduced by 0.08 €/cow/day in 2011 and by 0.02 €/cow/day in 2012. This lower spared amount in 2012 is the consequence of the reduction in PW protein concentration while its price increased. Anyway, comparison has to take into account the energy brought by this CDS as it has been suggested by Petersen’s equation, which compares CDS price with soybean meal but also with maize price. Further argument to be considered, especially in BB, is the high PW palatability, its low ruminal filling value and better roughage digestion. [less ▲]

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See detailIs the wheat distillers grains soluble ProtiWanze® a valuable alternative to soybean and canola meals in beef cattle?
Lessire, Françoise ULg; Rollin, Frédéric ULg

in Université de Berne (Ed.) Proceedings of 8th ECBHM (2013, August 28)

The objective of this study was to evaluate whether introducing the condensed distillers soluble (CDS) ProtiWanze® (PW) in beef cattle diets has an impact on feeding costs, health and production of the ... [more ▼]

The objective of this study was to evaluate whether introducing the condensed distillers soluble (CDS) ProtiWanze® (PW) in beef cattle diets has an impact on feeding costs, health and production of the animals. PW, a by-product derived from a Belgian bio-ethanol plant which utilizes only branless wheat, is an acid (pH=4) liquid feed rich in energy (VEM= 1130) and protein (TP= 282 mg/kg DM). PW supplementation from 9 to 13% on DM basis was tested in 4 suckler cattle farms for 4 months in 2011 and 2012: In 2011, 2 Belgian Blue (BB) (H1 and H3) and one Blonde d’Aquitaine (H2) herds were evaluated and in 2012, H2 was replaced by a third BB herd (H4). Every month, the animals’ health and production were checked by means of Body Condition Scoring (BCS), Ruminal Fill (RF), Fecal Consistency (FC), Undigested Fraction (UF) and Locomotion Scores (LS). Ruminal fluid was collected with a stomach tube (Ruminator®) on 5 cows for pH, redox potential (Methylene blue test) and protozoa assessment (optical microscopy). Reproduction performances during these 2 years were analyzed. The price of a diet containing the same amount of proteins brought by a mixture of 1/3 soybean and 2/3 canola meal was calculated to verify whether introducing PW reduced feeding costs. [less ▲]

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See detailIs the woodmouse (Apodemus sylvaticus) of sicily a distinct species?
Michaux, Johan ULg; Sara, Maurizio; Libois, Roland ULg et al

in Belgian Journal of Zoology (1998), 128(2), 211-214

[No abstract available]

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See detailIs there a Belgian School of Ethnic and Migration Studies ?
Martiniello, Marco ULg; Bousetta, Hassan ULg

in Radcliffe, P. (Ed.) The Politics of Social Science Research : ‘Race’, Ethnicity and Social Change (2001)

Detailed reference viewed: 32 (6 ULg)