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See detailImpact of Mycosphaerella fijiensis toxins on banana antioxidant systems.
Busogoro, J. P.; Olivier, T.; Leiva, M. et al

Poster (2006)

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See detailImpact of Myzus persicae infestation on the volatile emission of Arabidopsis thaliana Col-0.
Hien, Truong Thi Dieu ULg; Delaplace, Pierre ULg; Francis, Frédéric ULg et al

Poster (2012, July 22)

Being members of complex communities, plants often emit a wide range of volatile organic compounds to defend themselves against insect invasions. Although many studies exist on insect-induced plant ... [more ▼]

Being members of complex communities, plants often emit a wide range of volatile organic compounds to defend themselves against insect invasions. Although many studies exist on insect-induced plant volatile emission, most of them either compare the influences of various herbivore species on one plant species or the impact of a given herbivore on several host plant species. Moreover, informations related to the influence of insect density as well as the infestation duration are still needed. Here, we showed that a sucking insect – Myzus persicae (green peach aphid) induced the volatile emission from Arabidopsis thaliana Columbia wild-type (A.thaliana Col-0) under laboratory conditions based on results obtained by solid-phase micro-extraction coupled with gas chromatography - mass spectrometry (SPME-GC/MS). The released volatile blend was discussed in relation to related biosynthesis pathways and functions. These included terpenoids, green leaf volatiles, alcohols and isothiocyanate. The qualitative and overall proportion of volatile components differed depended on the number and residence duration of aphids on leaves. By studying the effects of sucking insect stresses to plant, we not only aim to contribute to the fundamental understanding of the emission of volatile components in the interaction between plants and pests, but also to provide standardised and easy to use assays to assess A.thaliana volatile changes according to cross stresses, including both biotic and abiotic ones in ongoing experiments. [less ▲]

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See detailThe impact of naturally-occurring, trans-placental bluetongue virus serotype-8 infection on reproductive performance in sheep.
Saegerman, Claude ULg; Bolkaerts, Benoit; Baricalla, Christine et al

in Veterinary Journal (2011), 187(1), 72-80

Infection with bluetongue virus serotype (BTV)-8 occurred in ruminants in 2006 in Central-Western Europe. The trans-placental passage of this virus has been demonstrated in naturally- and experimentally ... [more ▼]

Infection with bluetongue virus serotype (BTV)-8 occurred in ruminants in 2006 in Central-Western Europe. The trans-placental passage of this virus has been demonstrated in naturally- and experimentally-infected cattle and in experimentally-infected sheep. Trans-placental transmission is potentially important in the 'over-wintering' of this virus and its subsequent impact on reproductive performance. This epidemiological study was carried out on a sheep flock in Belgium that had experienced a severe outbreak of BTV-8 infection, and where the seroprevalence had increased from 1.3% to 88% between January and November 2007. In total, 476 lambs and 26 aborted fetuses from 300 ewes, lambing at four distinct time periods, were investigated between November 2007 and May 2008. The following evidence suggested that BTV-8 infection occurred in utero: (1) positive PCR results from splenic tissue from aborted fetuses (n=4); (2) fetal malformations suggestive of BTV infection (n=10); (3) positive PCR results from red blood cells in-lambs (n=7), and (4) the presence of antibody at birth in viable lambs prior to the intake of colostrum (n=9). The evidence provided by this investigation strongly suggests that trans-placental BTV-8 infection occurs in naturally-infected sheep and the impact of infection on the reproductive performance of such a naive flock was considerable, with up to 25% of ewes aborting and with flock fertility reduced by 50%. The contribution of in utero-infected lambs to the over-wintering of BTV appears limited. [less ▲]

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See detailImpact of net metering programs on optimal load management in US residential housing – a case study
Georges, Emeline ULg; Braun, J. E.; Groll, E. et al

in Proceedings of 9th International Conference on System Simulation in Buildings (2014, December 11)

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See detailImpact of new technology on cognitive and organizational processes in surgery
Blavier, Adelaïde ULg

Scientific conference (2005, January 04)

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See detailImpact of noise correction on diffusion kurtosis estimation
André, Elodie ULg; Balteau, Evelyne ULg; Phillips, Christophe ULg et al

in Proceedings of the International Society for Magnetic Resonance in Medicine ... Scientific Meeting and Exhibition. International Society For Magnetic Resonance in Medicine. Scientific Meeting and Exhibition (2012), 20

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See detailThe impact of nutrition on bone health
Reginster, Jean-Yves ULg; De Vriese, S.

in Osteoporosis International (2010, May), 21(Suppl.1), 389

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See detailImpact of oceanic circulation changes on atmospheric δ13CO2
Menviel, L.; Mouchet, Anne ULg; Meissner, K. J. et al

in Global Biogeochemical Cycles (2015), 29

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See detailImpact of Oil Solubility and Refrigerant Flashing on the Performance of Transcritical CO2 Vapor Compression Systems with Oil Flooding and Regeneration
Bell, Ian ULg; Groll, Eckhard; Braun, James et al

in International Refrigeration and Air Conditioning Conference at Purdue, July 12-15, 2010 (2010, July)

Flooding the compressor of a vapor compression system with oil can allow for a more isothermal compression process. This can lead to significant improvements in performance, particularly when combined ... [more ▼]

Flooding the compressor of a vapor compression system with oil can allow for a more isothermal compression process. This can lead to significant improvements in performance, particularly when combined with a regenerative heat exchanger. For CO2 cycles with supercritical heat rejection, the superheat horn and throttle are major sources of irreversibility. The combination of flooding and regeneration attacks both of these losses with a relatively small impact on system costs. The improvement in system COP can be over 20% for sink and source temperatures of 30°C and -30°C, respectively, with an optimized oil mass fraction and oils that have low refrigerant solubility. However, when some amount of refrigerant is solved in the oil, the cooling capacity is decreased. At a refrigerant solubility of 20% by mass in the oil for fixed oil mass fraction, there is no improvement in system COP compared to the baseline system. [less ▲]

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See detailImpact of operator expertise on collection of the APACHE II score and on the derived risk of death and standardized mortality ratio
Ledoux, Didier ULg

in Anaesthesia & Intensive Care (2005), 33(5), 585-590

We assessed the impact of operator expertise on collection of the APACHE II score, the derived risk of death and standardized mortality ratio in 465 consecutive patients admitted to a multi-disciplinary ... [more ▼]

We assessed the impact of operator expertise on collection of the APACHE II score, the derived risk of death and standardized mortality ratio in 465 consecutive patients admitted to a multi-disciplinary tertiary hospital ICU. Research coordinators and junior clinical staff independently collected the APACHE II variables; experts (senior clinical staff) rescored 20% of the records. Agreement was moderate between junior clinical staff and research coordinators or senior clinical staff for most variables of the acute physiology score (weighted kappa<0.6); agreement between research coordinators and senior clinical staff data collectors was good (weighted kappa >0.75). The APACHE II score and its derived risk of death (ROD) were significantly lower using the junior clinical staff dataset compared to research coordinators and senior clinical staff (APACHE II score: 13.4+/-9.2 vs 16.8+/-8.5 vs 17.1+/-7 7, P<0.001; ROD: 14.7%+/-22.4% vs 21.6%+/-22.6% vs 20.8%+/-22.4%, P<0.01 respectively). The discriminative capacity was not altered by the lack of agreement (area under Receiver Operator Characteristic curve >0.8) but calibration of ROD from the junior clinical staff dataset was poor (Goodness-of-fit: P= 0.001). The standardized mortality ratio (SMR) was higher with the junior clinical staff dataset (SMR: 1.22, 95% CI: 0.96-1.52 vs 0.87, 95% CI: 0.70-1.06 vs 0.76, 95% CI: 0.40-1.3 calculated from junior clinical staff research coordinators and senior clinical staff datasets respectively). We conclude that the expertise of data collectors significantly influences the APACHE II score, the derived risk of death and the standardized mortality ratio. Given the importance of such scores, ICUs should be provided with sufficient resources to train and employ dedicated data collectors. [less ▲]

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See detailThe impact of oregano (Origanum heracleoticum) essential oil and carvacrol on virulence gene transcription by Escherichia coli O157:H7
Mith, Hasika; Clinquart, Antoine ULg; Zhiri, Abdesselam et al

in FEMS Microbiology Letters (2015), 362

The aim of the current study was to determine, via reverse transcription quantitative polymerase chain reaction (RT-qPCR) analysis, the effect of oregano essential oil (Origanum heracleoticum) and ... [more ▼]

The aim of the current study was to determine, via reverse transcription quantitative polymerase chain reaction (RT-qPCR) analysis, the effect of oregano essential oil (Origanum heracleoticum) and carvacrol, its major component, on the expression of virulence-associated genes in enterohaemorrhagic Escherichia coli (EHEC) O157:H7 ATCC strain 35150. Both oregano oil and carvacrol demonstrated their efficacy firstly, by inhibiting the transcription of the ler gene involved in up regulation of the LEE2, LEE3 and LEE4 promoters and of attaching and effacing lesions and secondly by decreasing both Shiga toxin and fliC genes expression. In addition, a decrease in luxS gene transcription involved in quorum sensing was observed. These results were dose dependent and showed a specific effect of O. heracleoticum and carvacrol in downregulating the expression of virulence genes in EHEC O157:H7. These findings suggest that oregano oil and carvacrol have the potential to mitigate the adverse health effects caused by virulence gene expression in EHEC O157: [less ▲]

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See detailImpact of osteoarthritis and chronic back pain on health-related quality of life among patients on NSAIDS
Rabenda, Véronique ULg; Ethgen, Olivier ULg; Belaiche, Jacques ULg et al

in Osteoporosis International (2003, November), 14(Suppl. 7), 89-90

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See detailImpact of papyrus wetland encroachment on spatial and temporal variabilities of stream flow and sediment export from wet tropical catchments
Ryken, N.; Vanmaercke, Matthias ULg; Wanyama, J. et al

in Science of the Total Environment (2015), 511

During the past decades, land use change in the Lake Victoria basin has significantly increased the sediment fluxes to the lake. These sediments as well as their associated nutrients and pollutants affect ... [more ▼]

During the past decades, land use change in the Lake Victoria basin has significantly increased the sediment fluxes to the lake. These sediments as well as their associated nutrients and pollutants affect the food and water security of millions of people in one of Africa's most densely populated regions. Adequate catchment management strategies, based on a thorough understanding of the factors controlling runoff and sediment discharge are therefore crucial. Nonetheless, studies on the magnitude and dynamics of runoff and sediment discharge are very scarce for the Lake Victoria basin and the African Rift region.We therefore conducted runoff discharge and sediment export measurements in the Upper Rwizi, a catchment in Southwest Uganda, which is representative for the Lake Victoria basin. Land use in this catchment is characterized by grazing area on the high plateaus, banana cropping on the slopes and Cyperus papyrus L. wetlands in the valley bottoms. Due to an increasing population pressure, these papyrus wetlands are currently encroached and transformed into pasture and cropland. Seven subcatchments (358km2-2120km2), with different degrees of wetland encroachment, were monitored during the hydrological year June 2009-May 2010.Our results indicate that, due to their strong buffering capacity, papyrus wetlands have a first-order control on runoff and sediment discharge. Subcatchments with intact wetlands have a slower rainfall-runoff response, smaller peak runoff discharges, lower rainfall-runoff ratios and significantly smaller suspended sediment concentrations. This is also reflected in the measured annual area-specific suspended sediment yields (SYs): subcatchments with encroached papyrus swamps have SY values that are about three times larger compared to catchments with intact papyrus vegetation (respectively 106-137tonkm-2y-1 versus 34-37tonkm-2y-1). We therefore argue that protecting and (where possible) rehabilitating these papyrus wetlands should be a corner stone of catchment management strategies in the Lake Victoria basin. © 2014 Elsevier B.V. [less ▲]

See detailImpact of partial albumen removal on posthatch performance of laying hens
Willems, E.; Franssens, L.; Koppenol, A. et al

Conference (2013)

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See detailImpact of participatory risk assessment approaches on occupational health professional's attitutdes and practices Proceedings ICOH 2009
Mairiaux, Philippe ULg; Mazina, D. ULg; Roussel, Sandrine et al

Poster (2009, March)

In the last 10 years with the support of the Belgian Federal Public Service (FPS) for Employment and Labour and the European Social Fund, prevention advisors (PA) and occupational health physicians (OP ... [more ▼]

In the last 10 years with the support of the Belgian Federal Public Service (FPS) for Employment and Labour and the European Social Fund, prevention advisors (PA) and occupational health physicians (OP) have been invited to use new methods for risk assessment involving workers’ participation, namely the Sobane strategy, or the Risk/Toxtrainer methodology. This study aimed at evaluating these methods actual use among PA’s and OP’s, and its impact on representations and risk management practices. Methods A national postal survey was conducted in 2007 among a random sample (n=3340) of all professionals registered as PA (>6000) or OP (about 1000) by the FPS. The questionnaire explored those professionals’ familiarity with 12 different risk assessments methods, the nature of their interventions in enterprises, their representations about participation and collected demographic information. Results A total of 859 completed surveys (response rate: 25.7 %) could be analyzed. Among the methods studied, the Kinney-Wiruth accident risk analysis is the most familiar (54% regular users + 19% trained ones). The participatory methods are familiar (users + trained) to respectively 46 % (Sobane) and 11% (Risktrainer) of the respondents. When analyzing practices in enterprises, the professionals familiar with one of the participatory approaches are more often than the other professionals suggesting the use of participation in risk management to colleagues (84 vs 67.5% ; p<0.000) or to the employer (84 vs 73.5% ; p<0.000). Those professionals not familiar with the participatory approaches agree more often with the following statements: “PA role is more to inform than to listen” (p=0.005), “Participatory processes are raising unrealistic expectations among the staff” (p=0.002). Discussion This study shows that participatory risk assessment methods are gaining ground in Belgian enterprises. It also highlights the significant influence that information and training in those methods have had on risk management practices and the professionals’ representations. [less ▲]

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See detailImpact of participatory risk assessment approaches on occupational health professional's attitudes and practices
Mairiaux, Philippe ULg; Mazina, D. ULg; Roussel, Sandrine et al

Poster (2009, March)

Introduction In the last 10 years with the support of the Belgian Federal Public Service (FPS) for Employment and Labour and the European Social Fund, prevention advisors (PA) and occupational health ... [more ▼]

Introduction In the last 10 years with the support of the Belgian Federal Public Service (FPS) for Employment and Labour and the European Social Fund, prevention advisors (PA) and occupational health physicians (OP) have been invited to use new methods for risk assessment involving workers’ participation, namely the Sobane strategy, or the Risk/Toxtrainer methodology. This study aimed at evaluating these methods actual use among PA’s and OP’s, and its impact on representations and risk management practices. Methods A national postal survey was conducted in 2007 among a random sample (n=3340) of all professionals registered as PA (>6000) or OP (about 1000) by the FPS. The questionnaire explored those professionals’ familiarity with 12 different risk assessments methods, the nature of their interventions in enterprises, their representations about participation and collected demographic information. Results A total of 859 completed surveys (response rate: 25.7 %) could be analyzed. Among the methods studied, the Kinney-Wiruth accident risk analysis is the most familiar (54% regular users + 19% trained ones). The participatory methods are familiar (users + trained) to respectively 46 % (Sobane) and 11% (Risktrainer) of the respondents. When analyzing practices in enterprises, the professionals familiar with one of the participatory approaches are more often than the other professionals suggesting the use of participation in risk management to colleagues (84 vs 67.5% ; p<0.000) or to the employer (84 vs 73.5% ; p<0.000). Those professionals not familiar with the participatory approaches agree more often with the following statements: “PA role is more to inform than to listen” (p=0.005), “Participatory processes are raising unrealistic expectations among the staff” (p=0.002). Discussion This study shows that participatory risk assessment methods are gaining ground in Belgian enterprises. It also highlights the significant influence that information and training in those methods have had on risk management practices and the professionals’ representations. [less ▲]

Detailed reference viewed: 54 (1 ULg)