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See detailEffect of the exotic invasive plant Solidago gigantea on soil phosphorus status
Chapuis-Lardy, L.; Vanderhoeven, SONIA ULiege; Dassonville, N. et al

in Biology & Fertility of Soils (2006), 42(6), 481-489

Invasions by exotic plant species can modify biogeochemical cycles and soil properties. We tested whether invasion by early goldenrod (Solidago gigantea, Asteraceae) modifies soil phosphorus pools at ... [more ▼]

Invasions by exotic plant species can modify biogeochemical cycles and soil properties. We tested whether invasion by early goldenrod (Solidago gigantea, Asteraceae) modifies soil phosphorus pools at three sites in Belgium. Aboveground phytomass and soil samples (0-10 cm) were collected in early goldenrod patches and in adjacent, uninvaded, grassland vegetation. Soil P fractions varied between the three sites in line with corresponding differences in organic matter, carbonate and clay contents. In addition to site-specific impacts, plots invaded by goldenrods generally had higher concentrations of labile P [i.e. resin-extractable inorganic P (Pi) and bicarbonate-extractable Pi and organic P]. Soil CO2 release and alkaline and acid phosphomonoesterase activities were also higher in invaded plots, suggesting that the increase in labile Pi was due to enhanced mineralization. Phosphorus uptake by vegetation was 1.7-2.1 times higher in invaded plots, mostly due to the higher annual yield of S. gigantea. Altogether, the results indicate that S. gigantea enhances P turnover rates in invaded ecosystems. [less ▲]

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See detailEffect of the Extraction Technique, Heating Time and Cryogenic Grinding (N2 at -196°C) on the Composition of Cumin Seeds Volatile Oil
Mékaoui, R; Benkaci-Ali, Farid; Scholl, Georges ULiege et al

in Journal of Essential Oil-Bearing Plants [=JEOBP] (2016), 19(8), 1903-1919

Two techniques of extraction of essential oils (Steam distillation assisted by microwave (SDAM) and hydrodistillation assisted by microwave (HDAM)) are respectively advanced steam distillation (SD) and ... [more ▼]

Two techniques of extraction of essential oils (Steam distillation assisted by microwave (SDAM) and hydrodistillation assisted by microwave (HDAM)) are respectively advanced steam distillation (SD) and hydrodistillation techniques (HD), in which a microwave oven is used in the extraction process. They are considered as accelerated techniques extraction performed at atmospheric pressure. The cryogrinding (CG) showed a difference on the yields and aromatic profile comparing to the sample grinding. Isolation and concentration of volatile compounds are performed by a single stage for the extraction of volatile oil from Algerian (Sahara) Cuminum cyminum seeds (CCS). The chemical composition of the essential oil of this plant as a function of extraction time was also studied. The major components and family classes showed a significant variation with the extraction time. Gas chromatography (GC), GCxGC-mass spectrometry (GCxGC-MS)] were utilised for qualitative and quantitative analysis of essential oils extracted by these two methods. The major compounds are cumin aldehyde (HDAM-CG: 20.50-53.35 %, SDAM-CG: 21.68 66.6 %), p-cymene (HDAM-CG: 14.1-37.54 %, SDAM-CG: 6.06-20.18 %), β-pinene (HDAM-CG: 4.53-14.74 %, SDAM-CG: 4.3-32.65 %) and γ-terpinene (HDAM-CG: 1.26-14.70 %, SDAM-CG: 5.13-18.23 %). [less ▲]

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See detailEffect of the haptoglobin phenotype on the size of a myocardial infarct.
Chapelle, Jean-Paul ULiege; Albert, Adelin ULiege; Smeets, J P et al

in New England Journal of Medicine [=NEJM] (1982), 307(8), 457-63

We investigated the relation between haptoglobin (Hp) phenotypes and serum levels of various biochemical markers after myocardial infarction in 496 patients. In 122 subjects selected on the basis of short ... [more ▼]

We investigated the relation between haptoglobin (Hp) phenotypes and serum levels of various biochemical markers after myocardial infarction in 496 patients. In 122 subjects selected on the basis of short delays until hospitalization, patients with Hp 2-2 had higher cumulated creatine kinase activity than patients with Hp 1-1, or Hp 2-1 (P less than 0.05), as well as higher myoglobin concentrations (P less than 0.02) 12 to 28 hours after admission. Comparison of serum enzyme activities in the remaining 374 patients confirmed that Hp 2-2 patients had significantly higher total creatine kinase, creatine kinase isoenzyme MB fraction, aspartate aminotransferase, and lactate dehydrogenase peak levels. Complications of left ventricular failure were more frequent in these patients (P = 0.05). Our results suggest that Hp 2-2 patients have more severe myocardial infarctions than Hp 1-1 and Hp 2-1 patients, However, no difference in the distribution of haptoglobin phenotype was found between patients who had a myocardial infarction and healthy subjects, indicating that Hp 2-2 does not predispose to the occurrence of infarction. [less ▲]

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See detailThe effect of the hydrophobic chain lenght on surface properties of enzymatically prepared n-alkylesters of glucuronic acid.
Piccicuto, Salvator; Blecker, Christophe ULiege; Marlier, Michel et al

Poster (2004, February 11)

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See detailThe effect of the inclusion of Urtica dioica leaves meal in diets on growth performances and carcass characteristics of broiler
Moula, Nassim ULiege; Philippe, François-Xavier ULiege; Michaux, Charles ULiege et al

Poster (2014, October 17)

The objective of this study was to evaluate the effects of the inclusion of Urtica dioica leaves meal in diets on growth performances and carcass characteristics of broiler chicken. The study was ... [more ▼]

The objective of this study was to evaluate the effects of the inclusion of Urtica dioica leaves meal in diets on growth performances and carcass characteristics of broiler chicken. The study was conducted from May to June 2014 in the area of Chemini (Algeria). In a completely randomized design, a total of 100 one-day-old broilers (industrial strain) were divided into 2 groups and 2 repetitions with 25 chickens each. Group 1 was the control group fed a standard commercial diet based on corn and soybean purchased on the local market, whereas the birds in group 2 were fed the nettle diet (control diet with addition of 2% of nettle). The animals were housed inside in experimental pens and fed ad libitum. The results showed that nettle inclusion significantly promotes growth performance of broilers at 42 days of age (1644.8 ± 45.5 vs. 1565.1 ± 45.5g; P<0.05). The broilers fed the nettle diet had higher thigh yield (26.0 ± 0.3 vs. 25.2 ± 0.3%; P<0.05) but lower abdominal fat yield (4.39 ± 0.16 vs. 3.90 ± 0.16%; P<0.05). No significant effect of the diet was observed for carcass yield (around 71.1%) and breast percentage (around 32.40%). The overall mortality was not significantly different (P>0.05) for any of the dietary regimens (around 20%). Feed conversion ratio of the two groups were very close (around 2.17). This experiment showed that dietary inclusion of Urtica dioica has positive effects on growth performance and carcass quality of broilers. [less ▲]

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See detailEffect of the inclusion time of extruded linseed supplementation before slaughter on n-3 fatty acids enrichment of chicken meat.
Rondia, P.; Delmotte, Charles; Maene, D. et al

Poster (2003, September)

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See detailEffect of the inclusion time of extruded linseed supplementation before slaughter on n-3 fatty acids enrichment of chicken meat.
Rondia, P.; Delmotte, Charles; Maene, D. et al

in Proceedings "XVIth European Symposium on the Quality of Poultry Meat" (2003)

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See detailEffect of the injection solvent on steroid activity.
Deviche, P.; Balthazart, Jacques ULiege

in General and Comparative Endocrinology (1987), 65(2), 199-202

The effects of testosterone, 5 alpha-dihydrotestosterone, and androstenedione on cloacal gland and sternotracheal muscle growth and on luteinizing hormone plasma levels were studied in Japanese quail. The ... [more ▼]

The effects of testosterone, 5 alpha-dihydrotestosterone, and androstenedione on cloacal gland and sternotracheal muscle growth and on luteinizing hormone plasma levels were studied in Japanese quail. The steroids were given to the animals in daily intramuscular injections and were dissolved either in propylene glycol or in ethanol:saline (1:1). The three steroids had significant effects on the responses which were measured, but the magnitude of this effect was clearly related to the type of vehicle in which the steroids were dissolved. Furthermore there was a significant interaction between the effects of solvents and of steroid; for example, testosterone was much less androgenic than 5 alpha-dihydrotestosterone when dissolved in propylene glycol, but both had similar effects when dissolved in ethanol:saline. The effects of the mode of administration of different steroids on a given physiological response should be taken into consideration. [less ▲]

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See detailEffect of the intensity and frequency of glucose pulse perturbation on transient E. coli behavior : a step toward the large-scale bioreactor
Gorret, Nathalie; Sunya, Sirichai; Uribellarea, Jean-Louis et al

Conference (2012)

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See detailEffect of the kinematic hardening in the simulations of the straightening of long rolled profiles
Bouffioux, Chantal ULiege; Boman, Romain ULiege; Caillet, Nicolas et al

in Key Engineering Materials [=KEM] (2014), 611-612

Residual stresses and lack of straightness appear during the cooling of sheet piles where the initial temperature field is not homogeneous. To meet the standards, the long hot rolled pieces are ... [more ▼]

Residual stresses and lack of straightness appear during the cooling of sheet piles where the initial temperature field is not homogeneous. To meet the standards, the long hot rolled pieces are straightened using a series of rollers placed alternately above and below the pieces with shifts which create a succession of bendings. The process is modeled to study the impact of the industrial parameters ( the duration of the cooling and the rollers positions), to improve the final geometry and to reduce the residual stresses.Tests are carried out on this structural steel to observe the material behavior, then material laws are chosen and parameters of these laws are defined using and inverse method. Two sets of material data are obtained: for the first one, the hardening is supposed to be isotropic, and for the second one, additional tests are performed to describe isotropic and kinematic hardenings.The cooling followed by the straightening is then simulated by the finite element with these two sets of date. The comparison of the rollers forces, the deformation and the residual stresses show the impact of the kinematic hardening on such a process where the material undergoes a sucession of the tensions and compressions. The real forces applied by the rollers,the real curvature of the interlocks at the end of the straightening process and the distribution of the residual longitudinal stresses measured on the web using the ring core method are used to validate the numerical model. [less ▲]

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See detailEffect of the lengthening of the protocol on the reliability of knee muscle fatigue indicators
Bosquet, L.; Maquet, Didier ULiege; Forthomme, Bénédicte ULiege et al

in European Journal of Sports Medicine (2013, September), 1(1), 150

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See detailEffect of the Lengthening of the Protocol on the Reliability of Muscle Fatigue Indicators
Bosquet, Laurent; Maquet, Didier ULiege; Forthomme, Bénédicte ULiege et al

in International Journal of Sports Medicine (2010), 31(2), 82-88

The aim of this study was to examine absolute and relative reliability of fatigue measures calculated from peak torque or total work during 20, 30, 40 and 50 reciprocal maximal concentric contractions ... [more ▼]

The aim of this study was to examine absolute and relative reliability of fatigue measures calculated from peak torque or total work during 20, 30, 40 and 50 reciprocal maximal concentric contractions performed on an isokinetic dynamometer at 180 ° · s " 1 . Eighteen moderately active men performed 50 reciprocal maximal concentric contractions on three occasions with one 7 – 10 days recovery between each session. Peak torque and total work were computed for each contraction and subsequently summed to compute cumulated performance after respectively 20, 30, 40 and 50 repetitions. Muscle fatigue was determined after 20, 30, 40 and 50 repetitions by the fatigue index, the percent decrease in performance and the slope. Reliability of average peak torque or average total work was similar and was not a! ected by the lengthening of the protocol, although a learning e! ect was evident for knee flexors. Reliability of fatigue measures calculated from peak torque or total work was similar, improved with the lengthening of the protocol and was better for knee extensors. Measuring average peak torque or average total work and the slope during a protocol involving 30 maximal reciprocal concentric contractions appear to represent a better compromise between reliability and physiological interpretability of the data. [less ▲]

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See detailEffect of the luteinizing hormone on embryo production in superovulated rabbit does
Salvetti, P.; Theau-Clement, M.; Beckers, Jean-François ULiege et al

in Theriogenology (2007), 67(6), 1185-1193

For most domestic animals, the responses to superovulation treatments are not controlled as a consequence of the lack of knowledge on exogenous gonadotrophins effects on the ovarian function. The role of ... [more ▼]

For most domestic animals, the responses to superovulation treatments are not controlled as a consequence of the lack of knowledge on exogenous gonadotrophins effects on the ovarian function. The role of luteinizing hormone (LH) on the number and quality of embryos produced was evaluated on rabbit does superovulated with porcine FSH (pFSH). Parameters of embryos recovery, in vitro and in vivo embryo development rates after freezing/thawing were compared. We used three experimental groups: (1) control group without superovulation treatment, (2) "pFSH + pLH" and (3) "pFSH" groups where females were treated with pFSH, respectively, with (20%) or without (0%) porcine LH supplementation. The number of corpora lutea and the number of embryos produced were significantly higher (p < 0.001) in superovulated does than in control group (27.1, 26.7 versus 11.9 corpora lutea and 20.3, 21.2 versus 9.6 embryos produced for pFSH + pLH, pFSH and control group, respectively). However, both gonadotrophins administrations (groups 2 and 3) led to defaults of ovulation when compared with untreated does. No significant difference was observed between the number and quality of the embryos produced by does treated with pFSH + pLH or with pFSH alone. Moreover, we observed no significant difference between results of in vivo and in vitro viability assays after thawing. We concluded that pFSH alone seems to be sufficient to stimulate the follicles growth and that exogenous pLH administrated has no effect on the quantity and quality of embryos. Further studies are needed to evaluate the hormonal patterns before and after the gonadotrophins injections in the rabbit species. (c) 2007 Elsevier Inc. All rights reserved. [less ▲]

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See detailThe effect of the mechanical and structural properties of steel at elevated temperatures on the buckling of fire exposed columns
Franssen, Jean-Marc ULiege; Janss, José; Twilt, Leen

Report (1988)

Among other things, this reports explains how residual stresses have to be modelled in the numerical simulation of a structure subjected to fire

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See detailThe effect of the mesoporosity on the crystalline growth of hematite films used as photoelectrodes in water splitting
Toussaint, Caroline ULiege; Cloots, Rudi ULiege; Henrist, Catherine ULiege

Poster (2013)

The environmental effect of atmospheric CO2 associated with other geopolitical and economic problems linked to fossil fuels have urged the research and the development of new and clean sources of energy ... [more ▼]

The environmental effect of atmospheric CO2 associated with other geopolitical and economic problems linked to fossil fuels have urged the research and the development of new and clean sources of energy. The photoelectrolysis of water is an interesting way to produce clean fuel by converting solar energy into hydrogen. Hematite is a particularly attractive material for the photoelectrolysis of water thanks to its abundance, high stability in water and absorption in the visible part of the solar spectrum. Furthermore, the position of its valence band affords the oxidation of water into O2. Nevertheless, hematite has some drawbacks like a too low conduction band to reduce water, a bad conduction of electrons and a very short diffusion length of holes (2-10 nm). The application of a bias resolves the positioning of the conduction band, while the conduction of electrons is improved by adding a dopant (SiO2 or TiO2). The short diffusion length, for its part, is improved by reducing the distance electrode-electrolyte. For this purpose, we developed mesoporous hematite films doped by TiO2 by spin coating, based on the EIMP principle (Evaporation Inducing Micelles Packing). For the sake of comparison, a non mesoporous film was prepared. The crystallinity, the mesostructure and the performance in water splitting of the films were then characterized. Due to the high temperature of crystallization of the hematite, we had to proceed to the fine tuning of the thermal treatment to obtain a crystallized film and to preserve its mesoporosity, which was confirmed by TEM. Based on XRD analysis, it comes out that the mesoporosity leads to smaller grains than without mesoporosity. The water splitting performances were evaluated by measuring the photocurrent density under illumination (AM 1.5G, 100mW/cm²) and the mesoporous film showed promising efficiencies (1.9mA/cm²). [less ▲]

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See detailEffect of the method and the period of oil extraction on chemical composition of olive cake in northern of Morocco
El Otmani, Samira ULiege; Ayadi, Mohamed; Chentouf, Mouad et al

in Bayrou, Calixte; Cabaraux, Jean-François; Delguste, Catherine (Eds.) et al Proceedings of the 3rd FARAH Day (2016)

In the northern of Morocco, goat population is the most dominant. His diet is based on forest rangelands. Therefore, it is necessary to diversify and improve its feed calendar. Olive cake is by-product of ... [more ▼]

In the northern of Morocco, goat population is the most dominant. His diet is based on forest rangelands. Therefore, it is necessary to diversify and improve its feed calendar. Olive cake is by-product of oil extraction that widely available in the region with important production. It can be a feed resource of ruminant. This resource is produced by three methods and for limited period. This work aims to determine the effect of different oil extraction method and period on the chemical composition of olive cake in northern of Morocco. Twenty-seven samples of olive cake were collected from 3 mills by each extraction method (mechanical pressure, centrifugation 2 and 3 phases) during three periods (November, December and January). The chemical composition (dry matter, fat, mineral matter, crude protein and fibers) of the collected samples was determined by AOAC methods (1997). The extraction method had a significant effect on all parameters of the chemical composition with the exception of the fat and crude protein (P<0.05). The olive cake obtained by centrifugation 2 phases method had lower dry matter and fibers. The period had no effect on chemical composition, which eases the introduction of olive cake in the diet of ruminants. The olive cake of 2 phases is the most suitable for feed but has a reduced shelf life, which requires the development of a suitable conservation mode. [less ▲]

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See detailEffect of the method and the period of oil extraction on in vitro digestibility of olive cake in northern of Morocco
El Otmani, Samira ULiege; Ayadi, Mohamed; Chentouf, Mouad et al

in Proceedings of the 4th FARAH-Day (2017)

In Northern Morocco, goat population is the most dominant livestock. His feeding is based on forest rangelands and characterized by strong seasonal variability responsible of low productivity. Therefore ... [more ▼]

In Northern Morocco, goat population is the most dominant livestock. His feeding is based on forest rangelands and characterized by strong seasonal variability responsible of low productivity. Therefore, it is necessary to diversify and improve its diet. Olive cake is an oil extraction by-product that is widely available and can be a ruminant feed. Olive cake is produced by three methods and for limited period. This work aims to determine the effect of oil extraction method and period on digestibility of olive cake. Twenty-seven samples were collected from 3 mills by each extraction method (mechanical pressure, centrifugation 2 and 3 phases) during three periods (November, December and January). In vitro digestibility was performed using gas production method of (Menke et al., 1979) improved by Menke and Steingass (1988). Samples were incubated in glass syringes that contained rumen fluid and incubation solution that conserved in water bath in 39°C during 72 hours. Gas production was recorded after 2, 4, 8, 12, 24, 48 and 72 hours. Studied digestibility parameters were dry and organic matter digestibility, microbial biomass production, partitioning factor and volatile fatty acid. Extraction method affected digestion kinetics and the digestibility parameters except partition factor and volatile fatty acids. Olive cake obtained by 2 phases method had the highest digestibility. For extraction period, gas production decreased significantly per period. Period had no effect on digestibility parameters except for volatile fatty acids. Two phases olive cake is most suitable for feed but has a reduced shelf life, which requires the development of a suitable conservation mode. [less ▲]

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See detailEffect of the milk recording time on the genetic parameters of milk production and mid-infrared milk components in Luxembourg dairy cattle
Arnould, Valérie ULiege; Gengler, Nicolas ULiege; Soyeurt, Hélène ULiege

in Journal of Dairy Science (2012, July), 95

A particularity of the Luxembourg milk recording is the use of different schemes. Two principal schemes are applied: the scheme “S” applied on 69.1% of the total herds (n=712) and consisting in one ... [more ▼]

A particularity of the Luxembourg milk recording is the use of different schemes. Two principal schemes are applied: the scheme “S” applied on 69.1% of the total herds (n=712) and consisting in one proportionate sample of all daily milkings, and the scheme “T” (21.6% of the total herds) which consists in one sample of only one milking (morning or evening milking) (and alternating milking time from month to month). The problematic is that application of different schemes could influence the milk components (protein and fat yield) and the milk fat components (saturated and unsaturated groups of fatty acids) genetic parameters estimation and to prevent all comparisons between dairy population under different milk recording schemes. A total of 47,613 and 44,833 test-day records were obtained, respectively for schemes “S” and “T” from Holstein cows in first lactation in Luxembourg dairy herds. The used model included as fixed effects: herd x date of test, class of age, and month x year. Random effects were permanent environmental, additive genetics, and residual effects. The main objective of this work is to study the effect the choice of milk recording schemes (“S” or “T” schemes) on milk yield and milk components genetic parameters. A solution could be to add a fixed effect taking in account the milking time. The second objective is to study the effect of milking time (morning or evening) on genetic parameters estimated in the case of scheme “T”. According to the results, genetic parameters were statistically different between the schemes “S” and “T” for milk yield (P value < 0.0001). Further, the classifications of bulls according to their breeding values were very different when values were estimated on basis of scheme “S” or “T” (Spearman correlation value of 0.51 for milk yield for example). In conclusion, using several milk recording schemes do not allow any comparison of genetic parameters between dairy cattle’s. [less ▲]

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See detailEffect of the msb3 msb4 double mutation on the intracellular pool of purine nucleotides in the yeast Saccharomyces cerevisiae: application to the study of the biological activity of the oncogenic human protein oncTre210p.
Bach, Stéphane; Burny, Arsène; Bontemps, Françoise et al

in Yeast (Chichester, England) (2001), 18(S305), 17-7

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