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See detailInfluence of the estrous cycle on urodynamic and morphometric measurements of the lower portion of the urogenital tract in dogs
Hamaide, Annick ULg; Verstegen, John; Snaps, Frédéric ULg et al

in American Journal of Veterinary Research (2005), 66(6), 1075-1083

OBJECTIVES: To compare the values of the urodynamic parameters of the lower portion of the urinary tract and vaginourethral measurements obtained during the phases of the estrous cycle in dogs and ... [more ▼]

OBJECTIVES: To compare the values of the urodynamic parameters of the lower portion of the urinary tract and vaginourethral measurements obtained during the phases of the estrous cycle in dogs and determine possible functional or anatomic modifications of the lower portion of the urinary tract associated with those phases. ANIMALS: 7 adult female Beagles. PROCEDURE: Urethral pressure profilometry, diuresis cystometry, and vaginourethrography were performed in each dog during proestrus; estrus; early, mid, and late diestrus; and early and late anestrus. The maximum urethral pressure (MUP), maximum urethral closure pressure (MUCP), urethral functional and anatomic profile lengths (UFPL and UAPL, respectively), integrated pressure, threshold pressure, threshold volume, compliance, urethral length, and vaginal length and width were measured. RESULTS: For all measurements, significant interindividual variation was detected. Integrated and threshold pressures, APL, and each morphometric value significantly increased from late anestrus to proestrus. Compared with other phases, MUP, MUCP, and integrated pressure values were significantly lower in estrus and early diestrus; UAPL and UFPL values were significantly lower in late diestrus. At each cycle phase in old dogs, MUP, MUCP, threshold pressure, and vaginal length and width were significantly lower (except in proestrus for vaginal measurements) and threshold volume and compliance values were significantly higher, compared with middle-aged dogs. CONCLUSIONS AND CLINICAL RELEVANCE: Urodynamic and morphometric measurements of the lower portion of the urogenital tract are affected by the changes in hormonal balance that occur during the estrous cycle. In sexually intact female dogs, estrous phase determination is important for the interpretation of urodynamic data. [less ▲]

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See detailInfluence of the fertilization type, the day in the paddock and the month on nitrogen rejections in dairy cows
Dufrasne, Isabelle ULg; Istasse, Louis ULg; Robaye, Vincent ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2010), 14

Influence of the fertilization type, the day in the paddock and the month on nitrogen rejections in dairy cows. The present study aims to quantify nitrogen (N) rejections in dairy cows on a rotational ... [more ▼]

Influence of the fertilization type, the day in the paddock and the month on nitrogen rejections in dairy cows. The present study aims to quantify nitrogen (N) rejections in dairy cows on a rotational grazing system with different types of fertilization (compost, slurry and mineral N) at two different days in the paddock (days 3 and 5) and during two different periods (June and September). Grass yield and height were measured along with the chemical composition. The live weight was recorded when the cows moved into the paddock and milk yields was recorded at each milking. N intakes were measured on the basis of the energy requirement. When the cows were in the paddocks, individual samples of faeces and urine were collected to assess N rejections. The urea content in milk from the tank or from the individual cows was also measured. N intake was higher on day 3 than on day 5 and in September as compared with in June but was not influenced by the fertilization. The amount of N produced in milk was not influenced either by the fertilization, by the day on the paddock or by the month. The amount of urinary N was significantly higher in the N mineral group than in the two other groups. The N excretion in faeces and urines was higher on day 3 than on day 5. In June, the N excretion by the urine was lower than in September while the N excretion by the faeces was higher. Equations were calculated in order to estimate the N excretion by the urine in grazing dairy cows from the urea content in milk of a group of cows. [less ▲]

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See detailThe influence of the frequency of functional markers on repetitive imitation of syntactic constructions in children with specific language impairment, from their own language productions
Leroy, Sandrine ULg; Parisse, Christophe; Maillart, Christelle ULg

in Clinical Linguistics & Phonetics (2013), 27(6-7), 508-520

Several studies provide considerable insight into the role that frequency plays in language development. However, no study has investigated the direct relationship between frequency and grammatical ... [more ▼]

Several studies provide considerable insight into the role that frequency plays in language development. However, no study has investigated the direct relationship between frequency and grammatical acquisition in children with specific language impairment (SLI). In this study, we focus specifically on the influence of the frequency of functional words on the ability of children with SLI to produce grammatical constructions based on the children's own previous production but containing previously unused functional words. To test our hypothesis, the children were administered an imitative repetition task, tailored to their current level of language development. Results showed that children with SLI performed more poorly than language-matched children with typical language development. The difference between the two groups was more marked when the previously unused functional words were infrequent rather than frequent. Consequently, it would seem that the token frequency of functional words influences grammatical acquisition in children with SLI. The results and their implications for linguistic theories are discussed. [less ▲]

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See detailInfluence of the functionality of the quaternizing agent and the polymer molecular weight on the viscoelastic behaviour of α,ω-(dimethylamino)-polyisoprenes
Charlier, Pascal; Agarwal, Pawan K; Jérôme, Robert ULg

in Polymer (1995), 36(6), 1209-1216

Quaternization of the end-groups of α,ω-(dimethylamino)polyisoprenes with monofunctional, difunctional and trifunctional halides (iodides and bromides) has been undertaken on polymers of different ... [more ▼]

Quaternization of the end-groups of α,ω-(dimethylamino)polyisoprenes with monofunctional, difunctional and trifunctional halides (iodides and bromides) has been undertaken on polymers of different molecular weights (Mn = 6000 and 38000 gmol-l). The thermal stability of the ammonium end-groups is somewhat better when iodide counteranions are present. Quaternization increases the T~ of the material. This effect is more pronounced for low molecular weight chains, especially when a short alkyl group quaternizing agent is used. However, the size of the alkyl or aryl radical has a minor effect on polymer Tj when difunctional quaternizing agents are used. Nevertheless, the modulus of the rubber-like plateau of materials with difunctional agents is higher than with monofunctional quaternizing agents, owing to coupling reactions between the chain-ends. Rheological measurements indicate that the quaternized low molecular weight polyisoprenes exhibit an Arrhenius-type temperature dependence characterized by activation energies which vary between 121 and 146kJmol-1 and suggest that the relaxations attributed to dipole-dipole interactions dominate over long chain entanglements. [less ▲]

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See detailInfluence of the geographical area and the season on the milk urea content in Wallonia
Meura, S.; Dufrasne, Isabelle ULg; Cabaraux, Jean-François ULg et al

in Book of Abstracts of the 58th Annual Meeting of the European Association for Animal Production (2007)

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See detailInfluence of the gravity on the discharge of a silo
Dorbolo, Stéphane ULg; Maquet, Laurent ULg; Brandenbourger, Martin ULg et al

in Granular Matter (2013)

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See detailInfluence Of The Grinding Level And Extrusion On The Nutritional Value Of Lupin Seed (Lupinus Albus) For Cattle In The Context Of The Dutch Protein Evaluation System
Froidmont, E.; Bonnet, M.; Oger, Robert ULg et al

in Animal Feed Science and Technology (2008), 142(1-2),

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See detailInfluence of the hydrodynamic coupling on the results of an oedometric finite element model
Dassargues, Alain ULg

in ModelCARE 90, Calibration and Reliability in Groundwater modelling: volme of poster papers (1990)

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See detailInfluence of the intrapleural pressure on the variability of the pulmonary arterial pressures measurements in calves
Amory, Hélène ULg; Art, Tatiana ULg; Gustin, Pascal ULg et al

in Proceedings of 7th comparative Respiratory Society Meeting, Chicago (USA) (1988)

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See detailInfluence of the ionospheric refraction on the repeatability of distances computed by GPS
Warnant, René ULg

in Proceedings of the ION GPS’ 97 meeting (1997)

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See detailInfluence of the ionospheric refraction on time transfer using GPS
Warnant, René ULg

in Proceedings of the 11 th. European Frequency and Time Forum (1997)

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See detailInfluence of the Ixodes ricinus tick blood-feeding on the antigen-specific antibody response in vivo.
Menten-Dedoyart, Catherine ULg; Couvreur, B.; Thellin, Olivier ULg et al

in Vaccine (2008), 26(52), 6956-64

The blood meal of hard ticks such as Ixodes ricinus lasts several days. This is made possible by tick salivary factors that inhibit inflammation, haemostasis and the host immune response. We assessed the ... [more ▼]

The blood meal of hard ticks such as Ixodes ricinus lasts several days. This is made possible by tick salivary factors that inhibit inflammation, haemostasis and the host immune response. We assessed the latter on a model of immune response in vivo. A significant reduction of specific IgM and IgG levels was observed in BALB/c mice infested 5 days before injection with bovine serum albumin (BSA) and QuilA but not in mice infested 5 days after the immunization. This effect was not observed in mock-infested mice and could not be attributed to the use of anesthetics. The antibody response was not merely delayed and the Th(1)/Th(2) balance appeared not altered. T-dependent zones and germinal centers in lymph nodes draining the tick bite site showed no apparent morphological alterations or shift in T cell subpopulations. However, the spleens of tick-infested mice had also an enlarged red pulp, indicating an increased extramedullary haematopoietic activity. [less ▲]

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See detailInfluence of the material model on local pull-in in electromechanical microdevices topology optimization
Lemaire, Etienne ULg; Van Miegroet, Laurent ULg; Duysinx, Pierre ULg et al

in PLATO-N International Workshop - Extended Abstracts (2009, September)

The appearance of local pull-in modes has been noticed during electromechanical microdevices topology optimization. The goal of the present research is to study the influence of material properties ... [more ▼]

The appearance of local pull-in modes has been noticed during electromechanical microdevices topology optimization. The goal of the present research is to study the influence of material properties (mechanical and electrical) modeling for intermediate densities to see if an appropriate choice allows avoiding such local modes. At first, a simple 1D model is developed to study the influence of the material properties interpolation. Finally, we evaluate if the conclusions from the 1D model can help to prevent the appearance of local modes for a 2D topology optimization problem. [less ▲]

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See detailInfluence of the matrix on analyte fragmentation in atmospheric pressure MALDI
Schulz, Eric; Karas, Michael; Rosu, Frédéric ULg et al

in Journal of the American Society for Mass Spectrometry (2006), 17(7), 1005-1013

In this paper, we report the measurement of the degree of analyte fragmentation in AP-MALDI as a function of the matrix and of the laser fluence. The analytes include p-OCH3-benzylpyridinium, three ... [more ▼]

In this paper, we report the measurement of the degree of analyte fragmentation in AP-MALDI as a function of the matrix and of the laser fluence. The analytes include p-OCH3-benzylpyridinium, three peptides containing the sequence EEPP (which cleave very efficiently at the E-P site), and three deoxynucleosides (dA, dG, and dC), which lose the neutral sugar to give the protonated base. We found that the matrix hardness/softness was consistent when comparing the analytes, with a consensus ranking from hardest to softest: CHCA >> DHB > SA approximate to THAP > ATT > HPA. However, the exact ranking can be fluence-dependent, for example between ATT and HPA. Our goal here was to provide the scientific community with a detailed dataset that can be used to compare with theoretical predictions. We tried to correlate the consensus ranking with different matrix properties: sublimation or decomposition temperature (determined using thermogravimetry), analyte initial velocity, and matrix proton affinity. The best correlation was found with the matrix proton affinity. [less ▲]

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See detailInfluence of the matrix on the In Source Decay of permethylated glycans during MALDI-TOF analysis
Smargiasso, Nicolas ULg; De Pauw, Edwin ULg

Poster (2010, June)

Introduction In source decay (ISD) is a common phenomenon occurring very rapidly during ionization process in the source of MALDI-MS instruments and resulting in the presence of well resolved peaks of ... [more ▼]

Introduction In source decay (ISD) is a common phenomenon occurring very rapidly during ionization process in the source of MALDI-MS instruments and resulting in the presence of well resolved peaks of fragments in mass spectrum. While they make interpretation of spectra more complex, these fragments were shown to be useful to sequence peptides and proteins. Concerning glycans, only a few reports were published, using different matrices on various samples and therefore making it difficult to compare. In this context, the goal of this work is to perform a systematic study allowing to define optimal conditions to induce ISD of glycans or, inversely, to minimize this phenomenon in the study of more complex mixtures. Methods Glycans were purchased from Sigma-Aldrich. Iodomethane was used in DMSO/NaOH to permethylate the glycans. This reaction was stopped by water and permethylated glycans were extracted by chloroform. Spectra were recorded on a Bruker Ultraflex II in positive ion mode. 2,5-dihydroxybenzoic acid (DHB) and 6-aza-2-thiothymine (ATT) were prepared at 20 mg/ml in 50 % acetonitrile, 0.1 % formic acid solution. 9-aminoacridine (9-AA) was dissolved at saturation in a 50 % acetonitrile, 0.1 % formic acid and further diluted 4 times in the same solution. α-Cyano-4-hydroxycinnamic (HCCA) acid was prepared at 20 mg/ml in 97 % acetone, 0,1 % formic acid. In some spots, LiI was added to obtain Li+ adducts instead of Na+ adducts. Preliminary data In source fragmentation of permethylated Lacto-N-difucoHexaose I and LS tetrasaccharide B was first studied in DHB. While the MS/MS of the Na+ adducts of these compounds (performed by LID) produces intenses B and Y fragments, those resulting from in source fragmentation are mainly oxonium ions, resulting from the cleavage of a glycosylic bond without any exchange of hydrogen atoms. These oxonium fragments were also obtained for lithium adducts. It was previously described that these fragments are produced by the cleavage of a protonated glycosidic bond. These ions carry their positive charge on a trivalent oxygen atom and are therefore not present on the spectra as sodium adducts. Since the peaks of protonated glycans are very low in MALDI spectra, it would indicate that protonation of glycosidic bonds of permethylated glycans would strongly favor a fragmentation reaction. Different matrices were tested to compare their ability to induce in source fragmentation of permethylated glycans. Interestingly, ATT gave similar results comparing to DHB while HCCA showed a lesser ability to promote in source fragmentation. However, the most striking result came from the use of 9-AA. This matrix, which is usually used in negative ion mode, was able to produce easily sodium adducts ions of permethylated glycan with a satisfying signal to noise ratio in positive ion mode. Moreover, practically no in source fragmentation was observed with this matrix. The few produced fragments were B ions but no oxonium ions were detected. Presence of these B fragments was increased for Li+ adducts. As 9-AA is the most basic of tested matrices, the absence of oxonium ions could result from its inability to transfer protons to the glycosidic bond of permethylated glycans. 9-AA could therefore become a matrix of choice to study complex mixtures of glycans, by reducing artefact peaks produced by ISD. Novel aspect ISD of permethylated glycans is induced by DHB while 9-AA strongly favors the presence of molecular ions. [less ▲]

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