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See detailThe impact of teacher's dysphonia on children's skills to treat the spoken language
Morsomme, Dominique ULg; MINEL, Laura; Verduyckt, Ingrid ULg

Conference (2011, August 31)

The high prevalence of voice disorders among teachers is known (Roy et al, 2004). Authors (Morton et al, 2001, Rogerson et al, 2005) have shown the impact of a hoarse voice in teachers on student ... [more ▼]

The high prevalence of voice disorders among teachers is known (Roy et al, 2004). Authors (Morton et al, 2001, Rogerson et al, 2005) have shown the impact of a hoarse voice in teachers on student performance. Our aim is to analyze how 68 students (mean age: 8 years 5 months) processes dysphonic speech on a language comprehension task (MCQ on a short story) and on a minimal pair discrimination task (alike/not alike). Our hypothesis is that student performance will change depending on the modality of the tasks: dysphonic versus normophonic voice. Our results: For both the comprehension and the discrimination tasks, the scores of the students were significantly lower in the dysphonic voice modality (F (1,67) = 11.83, p <0.05) regardless of gender, the order of voice presentation and type of school. Moreover, we observe a greater effect of the dysphonic voice modality in the discrimination task (F (1,67) = 9.52, p <0.05). Thus the dysphonic voice disturbs the students the most in the process of discriminating between two isolated words. recognition of isolated words. Finally, when children judge the dysphonic voices, their comments are mostly slighting (98.33%). To conclude, these results support the necessity to prevent voice disorders among teachers and to create specific voice care programmes. [less ▲]

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See detailIMPACT OF TEACHERS’ VOICE QUALITY ON CHILDREN’S LANGUAGE
Morsomme, Dominique ULg; Minel, Laura; Verduyckt, Ingrid

in VOCOLOGIE: stem en stemstoornissen (2011)

Teachers are a professional group highly exposed to dysphonia, the accumulation of a high vocal demand and detrimental working environments are auspicious to the development of vocal disorders. Yet, the ... [more ▼]

Teachers are a professional group highly exposed to dysphonia, the accumulation of a high vocal demand and detrimental working environments are auspicious to the development of vocal disorders. Yet, the voice of a teacher is his main tool for conveying knowledge to his students, thus a teacher’s voice is of highest value. Recent studies have shown that altered vocal quality have an adverse impact on listeners’ speech processing skills. The objective of our study was to investigate the impact of dysphonic voice on the speech processing skills of 68 eight-year-old children on a text comprehension task and on a minimal pair discrimination task. Children were tested preliminarily according to their auditory attention skills and their lexical and phrasal skills. Children listened to a female voice that read a text and a list of minimal pairs first in a normal voice and then in a dysphonic voice. Their comprehension of the text was evaluated by their score at seven questions about the text and their discrimination score was defined according to the number of correctly discriminated pairs. Results show that dysphonic voice quality lowers the score of all children, regardless of age, gender or language processing skills and across both tasks (p < 0,05); the negative effect of the dysphonic voice quality is more marked on the discrimination task (p < 0,05). The results of this study clearly advocate for the prevention of voice disorders in teachers [less ▲]

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See detailImpact of the alkyl chain carbon atom number of uronic acid-derivative surfactants on interfacial and colloidal systems
Razafindralambo, Hary ULg; Richard, Gaetan ULg; Laurent, Pascal ULg et al

Poster (2012, March 26)

Uronic acid-derivative surfactants represent today an attractive group of Carbohydrate-based amphiphilic compounds for both fundamental and practical reasons [1,2]. In the continuity of our screening of ... [more ▼]

Uronic acid-derivative surfactants represent today an attractive group of Carbohydrate-based amphiphilic compounds for both fundamental and practical reasons [1,2]. In the continuity of our screening of their basic properties, and the approach in establishing relationships between their structure and properties [3,4], the impact of the alkyl chain carbon atom number on interfacial and colloidal systems has been systematically investigated. In this communication, the effect of odd-even number of carbon atom from C11 to C18, and the particular behavior of long chain derivatives on interfacial properties, as well as their impact on the formation and stability of colloidal systems, are presented. Experimental approaches have been conducted by investigating their properties and behaviors at gas-liquid and liquid-liquid under dynamic, equilibrium, and oscillatory interfacial conditions. Results are completed by and discussed with single molecule models established by theoretical approaches. [1] Razafindralambo, H.;Blecker, C.; Paquot, M., Screening of Basic Properties of Amphiphilic Molecular Structures for Colloidal System Formation and Stability. In Amphiphiles: Molecular Assembly and Applications, American Chemical Society: 2011; Vol. 1070, pp 53-66. [2] Laurent, P.; Razafindralambo, H.; Wathelet, B.; Blecker, C.; Wathelet, J.; Paquot, M., Synthesis and Surface-Active Properties of Uronic Amide Derivatives, Surfactants from Renewable Organic Raw Materials. J. Surfactants Deterg. 2011, 14, 51-63. [3] Razafindralambo, H.; Richel, A.; Wathelet, B.; Blecker, C.; Wathelet, J.; Brasseur, R.; Lins, L.; Miñones, J.; Paquot, M., Monolayer properties of uronic acid bicatenary derivatives at the air-water interface: effect of hydroxyl group stereochemistry evidenced by experimental and computational approaches. Physical chemistry chemical physics: PCCP 2011, 13 15291-15298. [4] Razafindralambo, H.; Blecker, C.; Mezdour, S.; Deroanne, C.; Crowet, J.; Brasseur,R.; Lins, L.; Paquot, M., Impacts of the Carbonyl Group Location of Ester Bond on Interfacial Properties of Sugar-Based Surfactants: Experimental and Computational Evidences. The journal of physical chemistry. B 2009, 113, 8872-8877. [less ▲]

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See detailImpact of the Asian ladybeetles’ invasions on agro-ecosystems (Belgium)
Vandereycken, Axel ULg; Durieux, Delphine ULg; Joie, Emilie ULg et al

Conference (2010, September 23)

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See detailImpact of the attenuation and scatter correction methods on hot and cold contrasts obtained with the Philips Gemini PET-scanner.
Seret, Alain ULg; Nguyen, T.; Bernard, Claire ULg

in European Journal of Nuclear Medicine and Molecular Imaging (2006), 33(S2), 316

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See detailImpact of the Crystallinity on the Physical Properties of Inulin during Water Sorption
Ronkart, Sebastien N; Paquot, Michel ULg; Blecker, Christophe ULg et al

in Food Biophysics (2009), 4(1), 49-58

The impact of the crystallinity of spray-dried inulins on their stability and physical properties was investigated after a conditioning of 1 week at different relative humidity levels (0% to 94%) at 20 A ... [more ▼]

The impact of the crystallinity of spray-dried inulins on their stability and physical properties was investigated after a conditioning of 1 week at different relative humidity levels (0% to 94%) at 20 A degrees C. An environmental scanning electron microscopy study showed that the amorphous powders hardened at a relative humidity storage between 59% and 75%; while their semi-crystalline counterparts were partially agglomerated but friable in the same conditions. Caking was observed when the glass transition temperature of the amorphous phase of the material dropped below the storage temperature of the powder. It resulted in a crystallization of the structural units of varying lengths composing inulin, but also an increase of the crystallinity of the semi-crystalline ones. This study showed the importance of the crystallinity of inulin on its stability and physical properties during storage which is of crucial importance for the shelf-life of food and pharmaceutical products in the dry state. [less ▲]

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See detailImpact of the crystallisation pathway of inulin on its mono-hydrate to hemi-hydrate thermal transition
Ronkart, S. N.; Deroanne, C.; Paquot, Michel ULg et al

in Food Chemistry (2010), 119(1), 317-322

In this paper, we present the thermal properties of two inulins obtained from different crystallisation pathways. One was obtained by fractional precipitation of a saturated inulin solution and the second ... [more ▼]

In this paper, we present the thermal properties of two inulins obtained from different crystallisation pathways. One was obtained by fractional precipitation of a saturated inulin solution and the second was from the crystallisation of a solid amorphous mulin. The thermal analyses were conducted by temperature resolved wide angle X-ray scattering (TRWAXS), differential scanning calorimetry (DSC) and thermogravimetry (TG). Although at room temperature both inulins presented similar X-ray diffractogram patterns characteristic of the mono-hydrate polymorph, they differed considerably by their thermal properties. During heating, a difference in the mono-hydrate to the hemi-hydrate polymorph transition occurred. Thermogravimetric analysis suggested a difference in the water mobility inside the material which had an impact on the thermal properties and hydrate transition of the crystalline inulin. (C) 2009 Elsevier Ltd. All rights reserved. [less ▲]

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See detailImpact of the crystallisation pathway of inulin on its mono-hydrate to hemi-hydrate thermal transition
Ronkart, Sébastien; Deroanne, Claude; Paquot, Michel ULg et al

Poster (2010, March 22)

Inulin plays a major role in the food industry as dietary fibre, bulking agent and fat or sugar substitute. Thermal properties of two inulins obtained from different crystallisation pathways were ... [more ▼]

Inulin plays a major role in the food industry as dietary fibre, bulking agent and fat or sugar substitute. Thermal properties of two inulins obtained from different crystallisation pathways were investigated. The first one, was obtained by fractional precipitation of a saturated inulin solution (40/120). The second one, came from a solid amorphous inulin (95/120). These two inulins were spray dried with an inlet air temperature of 120°C. Then, these powders were placed into controlled atmosphere conditions at 0 % HR during one week and at 94% during the same time. Finally the two inulins were called 40/120/94% and 95/120/94% and their thermal properties were investigated by Wide angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), temperature resolved wide angle X-ray scattering (TRWAXS) and thermogravimetry (TGA).Although WAXS did not show any difference between the two inulin, thermal analysis revealed the existence of a hemi-hydratate inulin (40/120/94%). This fact has an implication on the processing of the powder at an industrial level. Indeed, 40/120/94% has shown an agglomeration whereas 95/120/94% was a continuous mass. In other words, polymorphism of inulin crystals induces technofunctionality changes of the powder (hygroscopy, solubility, etc.) which could have an impact during processing or formulation of the powder. [less ▲]

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See detailImpact of the da Vinci robotic system on the learning of surgical skills: Implication and limits for training and safety
Blavier, Adelaïde ULg; Nyssen, Anne-Sophie ULg

in Troccaz, J; Merloz, P (Eds.) Computer-aided medical interventions: Tools and applications (2007, September)

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See detailImpact of the depth on bacterial diversity in an agricultural soil
Stroobants, Aurore ULg; Degrune, Florine ULg; Lambert, Christophe et al

Poster (2013, February 08)

Bacteria are the most abundant and diverse microorganisms in soils. They play an important role in soil formation, contribute to plant nutrition and are involved in various processes in agroecosystems ... [more ▼]

Bacteria are the most abundant and diverse microorganisms in soils. They play an important role in soil formation, contribute to plant nutrition and are involved in various processes in agroecosystems such as nutrient cycling. The aim of this study was to evaluate the impact of the depth on bacterial diversity and quantity in an agricultural soil. Samples was collected on May 2011 and May 2012 at three different depths : 10, 25 and 45 centimeters. The quantity of total bacteria was measured by real time PCR and the analysis of the diversity was performed by the high throughput sequencing technology. Results obtained by these methods show that the biomass and the bacterial quantity and diversity (Shannon index) decrease with the depth, particularly at 45 centimeters. The biomass is, in average, 6.5 fold less important at 45 cm than at 10 cm and the quantity is 17 fold lower at 45 cm than at 10 cm. Our results also indicate that many taxa, such as Betaprotebacteria, Deltaproterobacteria, Gammaproteobacteria, Acidobacteria and Burkholderiales are influenced by the depth. The results will be presented in more details on the poster. [less ▲]

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See detailImpact of the dialysis membrane on the Vitamin D metabolims markers
CAVALIER, Etienne ULg; DUBOIS, Bernard ULg; Urena, Pablo et al

Poster (2014, November)

Detailed reference viewed: 17 (1 ULg)
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See detailThe impact of the earthquake activity in Western Europe from the historical and architectural records
Camelbeeck, Thierry; Alexandre, Pierre ULg; Sabbe, Alain et al

in Talwani, Pradeep (Ed.) Intraplate earthquakes (2014)

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See detailImpact of the extension of black leaf streak disease on banana susceptibility to post-harvest diseases
Ewané, Cécile Annie; Chillet, Marc; Castelan, Florence et al

in Fruits (2013), 68(5), 351-365

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See detailImpact of the floor type on emissions of ammonia and greenhouse gases from pig houses.
Philippe, François-Xavier ULg; Laitat, Martine ULg; Wavreille, José et al

in Proceedings of the 2nd Scientific Meeting of the Faculty of Veterinary Medicine (Liège – Belgium) (2012)

Detailed reference viewed: 18 (1 ULg)