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See detailEffect of annealing atmosphere on the galvanizing behaviour of a dual-phase steel
Khondker, Rubayat; Mertens, Anne ULg; McDermid, Joe R.

Conference (2006, March)

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See detailEffect of annealing temperatures on properties of sol-gel grown ZnO-ZrO2 films
Ivanova, T.; Harizanova, A.; Koutzarova, T. et al

in Crystal Research And Technology (2010), 45(11), 1154-1160

Mixed ZnO-ZrO2 films have been obtained by sol-gel technology. By using spin coating method, the films were deposited on Si and glass substrates. The influence of thermal annealings (the temperatures vary ... [more ▼]

Mixed ZnO-ZrO2 films have been obtained by sol-gel technology. By using spin coating method, the films were deposited on Si and glass substrates. The influence of thermal annealings (the temperatures vary from 400 degrees C to 750 degrees C) on their structural properties has been studied. The structural behavior has been investigated by the means of XRD and FTIR techniques. The results revealed no presence of mixed oxide phases, the detected crystal phases were related to the hexagonal ZnO and to crystalline ZrO2. The sol-gel ZnO-ZrO2 films showed polycrystalline structure with a certain degree of an amorphous fraction. The optical transmittance reached 91% and it diminished with increasing the annealing temperatures. The optical properties of the sol-gel ZnO-ZrO2 films, deposited on glass substrates are excellent with high transparency and better then those of pure ZrO2 films, obtained at similar technological conditions. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim [less ▲]

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See detailEFFECT OF ANTI-ANDROGENIC SUBSTANCES ON THE SEXUAL REPRODUCTION OF ROTIFERS : IMPACTS ON BRACHIONUS CALYCIFLORUS MALE FERTILITY
Joaquim-Justo, Célia ULg; Maule, P; Luy, N et al

Conference (2007, August 12)

Many substances released in aquatic ecosystems have been reported to disrupt endocrine systems in vertebrates and invertebrates. In the rotifer Brachionus calyciflorus, studies show that chemicals ... [more ▼]

Many substances released in aquatic ecosystems have been reported to disrupt endocrine systems in vertebrates and invertebrates. In the rotifer Brachionus calyciflorus, studies show that chemicals characterized by a high affinity to the vertebrate androgen receptor depress sexual reproduction at concentrations one to two orders of magnitude below those that affect asexual reproduction. We studied the effect of cyproterone acetate, an anti-androgen of steroid like structure, and of the pesticide fenitrothion, a non steroidal molecular which has a high affinity to the vertebrate androgen receptor, on the sexual reproduction of rotifers. In mating experiments we crossed control females with exposed males and vice versa to determine whether anti-androgens affected males, females or both. Fertilization rate and number of resting eggs produced were affected by both substances tested. With fenitrothion, depression of these endpoints was observed exclusively when males were treated. Cyproterone acetate enhanced production of resting eggs whereas fertilization rate was not significantly affected. Increased production of resting eggs was observed both with treated females and males. Parameters of male fertility were compared in control and in exposed males. We report impacts on spermatozoa numbers, morphology and fertilizing potential, and on male morphology, longevity and mating behaviour for the two substances tested. [less ▲]

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See detailEffect of anti-androgenic substances on the sexual reproduction of the rotifer Brachionus calyciflorus.
Joaquim-Justo, Célia ULg; Snell, T.W

Conference (2006, March 11)

Many substances released in the aquatic environment have been reported to have disruptive effects on endocrine systems of vertebrates and invertebrates. In rotifers, some of these chemicals have been ... [more ▼]

Many substances released in the aquatic environment have been reported to have disruptive effects on endocrine systems of vertebrates and invertebrates. In rotifers, some of these chemicals have been shown to depress sexual reproduction at concentrations one to two orders of magnitude below those that affect asexual reproduction. The anti-androgen flutamide impacts sexual reproduction of rotifers at particularly low concentrations. We studied the effect of different types of putative endocrine disruptors on sexual reproduction of Brachionus calyciflorus. Contaminants tested were cyproterone acetate, an anti-androgen with a steroid-like structure, the pesticides fenitrothion and linuron which both have high affinity to the androgen receptor in vertebrates, although they are nonsteroidal molecules, and lindane a widely used pesticide that binds weakly to the androgen receptor in vertebrates. A series of endpoints relative to different steps of sexual reproduction were monitored to define critical functions affected and to get information on mechanisms of action. Fenitrothion, had the strongest impact on the sexual reproduction of rotifers. We observed a decrease in the proportion of mictic females among the ovigerous individuals and in the production of fertilized eggs per female that was proportional to the dose. The most sensitive parameter was the number of males produced per mictic female which was considerably higher in treated animals even at concentrations 10 times lower than the NOEC of asexual reproduction. [less ▲]

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See detailEffect of antiepileptic drugs and reactive oxygen species on folate receptor 1 (FOLR1)-dependent 5-methyltetrahydrofolate transport.
Opladen, Thomas; Blau, Nenad; RAMAEKERS, Vincent ULg

in Molecular Genetics & Metabolism (2010), 101(1), 48-54

Metabolic breakdown of valproate (VPA), carbamazepine (CBZ) and phenytoin (PHT) by the cytochrome P450 pathway generates toxic drug intermediates and reactive oxygen species (ROS). This mechanism has been ... [more ▼]

Metabolic breakdown of valproate (VPA), carbamazepine (CBZ) and phenytoin (PHT) by the cytochrome P450 pathway generates toxic drug intermediates and reactive oxygen species (ROS). This mechanism has been suspected to play a role in the pathogenesis of secondary cerebral folate deficiency (CFD). Using KB-cell cultures, highly expressing the folate receptor 1 (FOLR1), the effect of antiepileptic drugs (AEDs) and reactive oxygen species (ROS) on the FOLR1 dependent 5-methyltetrahydrofolate (MTHF) uptake was studied. MTHF uptake is time and concentration dependent and shows saturation kinetics. At physiological MTHF concentrations the high-affinity FOLR1 represents the predominant mechanism for cellular incorporation, while at high MTHF concentrations other transport mechanisms participate in folate uptake. Exposure to PHT for more than 8h led to a higher MTHF uptake and decreased cell count, whereas MTHF uptake remained unaltered by VPA and CBZ. However, exposure to superoxide and hydrogen peroxide radicals significantly decreased cellular MTHF uptake. By specific elimination and downregulation of FOLR1 using phosphatidyl-inositol-specific phospholipase C (PIPLC) and siRNA silencing, it was shown that ROS not only inhibited FOLR1 mediated MTHF uptake but also affected all other mechanisms of membrane-mediated MTHF uptake. Generation of ROS with the use of AED might therefore provide an additional explanation for the disturbed folate transfer across the blood-CSF barrier in patients with CFD. [less ▲]

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See detailEffect of aroma compounds on microorganisms
Waché, Y.; Gianotti, A.; Lanciotti, R. et al

Poster (2005, March)

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See detailEffect of artificial insemination site on post-mating endometritis in mares
Rodier, Clémentine; Ponthier, Jérôme ULg; Parrilla Hernandez, Sonia ULg et al

in Reproduction in Domestic Animals (2012, August), 47(suppl 5), 103

Aim of the study was to determine the effect of artificial insemination (AI) location on post-mating endometrial inflammation 1 and 6 days after AI. Six mares with ages ranging from 12 to 23 years were ... [more ▼]

Aim of the study was to determine the effect of artificial insemination (AI) location on post-mating endometrial inflammation 1 and 6 days after AI. Six mares with ages ranging from 12 to 23 years were inseminated with a same batch of frozen semen for 3 consecutive cycles. Mares were inseminated with the following procedures in a random order: (1) Deep uterine insemination with 4ml of semen; (2) Horn bifurcation with 4ml of semen; (3) Horn bifurcation with 4ml of semen and 6ml of extender. During each cycle, Cotton (C) and Brush (B) swabs were collected at 4 different moments: mid- dioestrus, mares with a 35mm follicle, 24h and 6 days after AI. Swabs were smeared on slides, fixed and stained (Diff-Quick®) before examination under light microscopy. Proportions of inflammatory and epithelial cells were determined and differences were studied with kruskal-wallis test for non-parametric data. Distensions of uterine lumen due to intraluminal fluid observed during ultrasound exams were measured and recorded. Quality of slides was better (p=0.0006) with B swabs than C swabs with 97% versus 65% of slides readable. B swabs were associated with higher percent of endometrial cells retrieved (p=0.0323), making them a better tool for endometritis diagnosis, which is consistent with our previous reports. Volume of intraluminal fluid and percent of inflammatory cells, both on B and C swabs, were not influenced by AI location regardless the timing of sampling. Small volume deep uterine AI did not significantly affect inflammatory response by the endometrium in our experiment. [less ▲]

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See detailEffect of aspartate and glutamate on the oxoglutarate carrier investigated in rat heart mitochondria and inverted submitochondrial vesicles.
Hautecler, J.; Sluse-Goffart, C.-M.; Evens, A. et al

in Biochimica et Biophysica Acta-Bioenergetics (1994), 1185

Interaction of glutamate and aspartate with the oxoglutarate carrier was investigated in rat heart mitochondria or inverted submitochondrial particles. With mitochondria, glutamate and aspartate had no ... [more ▼]

Interaction of glutamate and aspartate with the oxoglutarate carrier was investigated in rat heart mitochondria or inverted submitochondrial particles. With mitochondria, glutamate and aspartate had no effect on the initial rate of oxoglutarate or malate uptake. With inverted submitochondrial vesicles, binding experiments indicated that aspartate bound to the oxoglutarate carrier on its matricial face and increased the affinity of the substrate binding site for malate but did not change the affinity for oxoglutarate. Glutamate had no effect on both substrate bindings. The dissociation constants of the binary substrate-carrier complexes on the matricial side were determined (1.28 +/- 0.15 mM for oxoglutarate and 2.22 +/- 0.26 mM for malate). These values, compared with those obtained previously on the cytosolic side of intact mitochondria, confirmed the asymmetry of the carrier in the native membrane (higher affinities on the cytosolic face). It is concluded that (1) aspartate and glutamate are not cytosolic effectors of the oxoglutarate carrier, (2) matricial aspartate is a positive effector of the binding of malate on the matricial side of the oxoglutarate carrier, and (3) such a characteristic may play a role in the regulation of the oxoglutarate carrier. Thus, it may be emphasized that (1) this observation is the first clear evidence of a well-defined 'sophisticated regulation' (allosteric) of a mitochondrial metabolite carrier, and (2) this regulation of the oxoglutarate carrier may have important consequences on the efficiency of reducing equivalent import in the matrix space by the malate-aspartate shuttle. [less ▲]

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See detailEffect of atropine-dobutamine stress test on left ventricular echocardio graphic parameters in untrained warmblood horses
Sandersen, Charlotte ULg; Detilleux, Johann ULg; De Moffarts, Brieux et al

in Journal of Veterinary Internal Medicine (2006)

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See detailThe effect of auditory distractors on song discrimination in male canaries (Serinus canaria)
Appeltants, D.; Gentner, T. Q.; Hulse, S. H. et al

in Behavioural Processes (2005), 69(3), 331-341

Male songbirds such as canaries produce complex learned vocalizations that are used in the context of mate attraction and territory defense. Successful mate attraction or territorial defense requires that ... [more ▼]

Male songbirds such as canaries produce complex learned vocalizations that are used in the context of mate attraction and territory defense. Successful mate attraction or territorial defense requires that a bird be able to recognize individuals based on their vocal performance and identify these songs in a noisy background. In order to learn more about how birds are able to solve this problem, we investigated, with a two-alternative choice procedure, the ability of adult male canaries to discriminate between conspecific song segments from two different birds and to maintain this discrimination when conspecific songs are superimposed with a variety of distractors. The results indicate that male canaries have the ability to discriminate, with a high level of accuracy song segments produced by two different conspecific birds. Song discrimination was partially maintained when the stimuli were masked by auditory distractors, but the accuracy of the discrimination progressively declined as a function of the number of masking distractors. The type of distractor used in the experiments (other conspecific songs or different types of artificial white noise) did not markedly affect the rate of deterioration of the song discrimination. These data indicate that adult male canaries have the perceptual abilities to discriminate and selectively attend to one ongoing sound that occurs simultaneously with one or more other sounds. The administration of a noradrenergic neurotoxin did not impair markedly the discrimination learning abilities although the number of subjects tested was too small to allow any firm conclusion. In these conditions, however, the noradrenergic lesion significantly increased the number failures to respond in the discrimination learning task suggesting a role, in canaries, of the noradrenergic system in some attentional processes underlying song learning and processing. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

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See detailEffect of austenite destabilisation heat treatment on graphite precipitation in chromium iron
Lecomte-Beckers, Jacqueline ULg; Terziev, Luben; Breyer, Jean-Pierre

in Proceedings of the International Conference on Solid-SoUd Phase Transformations ‘99 (JIMIC3) (1999)

During solidification of chromium iron, carbides such as M7C3 are precipitating. It is possible to obtain crystallized graphite in the asaCast state by modifying the composition of the alloy[lJ.The aim of ... [more ▼]

During solidification of chromium iron, carbides such as M7C3 are precipitating. It is possible to obtain crystallized graphite in the asaCast state by modifying the composition of the alloy[lJ.The aim of the study is to understanding the mechanism of precipitation of graphite not only during solidification but also during heat treatment. Dilatometric, microcalorimetric, resistometric and microstructural examination methods were used for the investigations. We have shown that graphite precipitation occurs by decomposition ofM7C3 chromium carbides during austenite destabilisation heat treatment. The shape and the amount of graphite depend on the treatment temperature and time. [less ▲]

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See detailThe effect of avocado and soybean unsaponifiables on freshly isolated human articular chondrocytes
Henrotin, Yves ULg; Labasse, A; Zheng, S et al

in Rheumatology in Europe (1997), 26(S2), 280

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See detailThe effect of avocado and soybean unsaponifiables on freshly isolated human articular chondrocytes
Henrotin, Yves ULg; Labasse, A; Zheng, S et al

in Arthritis and Rheumatism (1997), 40(S9), 89

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See detailThe effect of avocado and soybean unsaponifiables on freshly isolated human articular chondrocytes
Henrotin, Yves ULg; Labasse, A; Zheng, S et al

in Revue du Rhumatisme (English ed.) (1997), 11

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See detailEffect of Azawak colostrum administration on plasma protein profile in red kid
Abdoul, H; Marichatou, H; Beckers, Jean-François ULg et al

in Proceedings of the 2nd Scientific Meeting of the Faculty of Veterinary Medicine (2012, October 19)

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See detailEffect of back mixing during convective drying of wastewater sludges
Léonard, Angélique ULg; Meneses, Eustedio; Salmon, Thierry ULg et al

in Proceeedings of the joint of AFSIA (Association Française de Séchage dans l'Industrie et l'Agriculture) and Working group on Drying of EFCE at INA P-G, Paris, 12th and 13th May, 2005 (2005, May)

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See detailEffect Of Barley Fibres And Barley Intake On The Ileal Endogenous Nitrogen Losses In Piglets
Leterme, Pascal; Souffrant, Wb.; Thewis, André ULg

in Journal of Cereal Science (2000), 31(3), 229-239

Ileal endogenous N losses (ENL) were measured, using the 15N isotope dilution technique, in piglets (17 kg) fed different barley genotypes (naked, spring, winter with low/high beta-glucan content) or ... [more ▼]

Ileal endogenous N losses (ENL) were measured, using the 15N isotope dilution technique, in piglets (17 kg) fed different barley genotypes (naked, spring, winter with low/high beta-glucan content) or diets containing 330, 530, 730 or 930 g of a blend of barleys/kg diet. The apparent protein and amino acid digestibilities of the naked variety and the winter variety with a high beta-glucan content were, on average, significantly higher than those for the other two varieties. The ENL were inversely correlated (p<0·01) with the apparent digestibilities but the difference between each of them was not significant (p>0·05). The ENL increased linearly with the inclusion level of barley in a N-free basal diet (2 mg endogenous N/g barley). Isolated hulls added to a N-free diet at the rate of 100 or 200 g/ kg diet exerted no significant effect on the ENL (1·80 g endogenous N/kg diet in both cases vs. 1·76 g for the basal level). On the contrary, the effect of isolated bran, measured under similar conditions, was significantly higher and dependent on fibre intake (2·59 and 3·31 g N/kg diet, respectively). It is concluded that the ENL are affected by the insoluble bran fibre but not by the hulls, nor by the level of beta-glucan. [less ▲]

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See detailEffect of base mutations in GC rich binding site on recognition by minor groove binding dications
Munde, M; Ismail, M; Peixoto, Paul ULg et al

Poster (2007)

Detailed reference viewed: 12 (1 ULg)