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Peer Reviewed
See detailComparative study of decyl thiocyanate and decanethiol self-assembled monolayers on gold substrates
Dreesen, Laurent ULg; Volcke, Cédric; Sartenaer, Yannick et al

Poster (2005, September)

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See detailComparative study of dichlorodiphenyldichloroethylene in blood and semen of two young male populations: Lack of relationship to infertility, but evidence of high exposure of the mothers
Charlier, Corinne ULg; Foidart, Jean-Michel ULg

in Reproductive Toxicology (2005), 20(2, Jul-Aug), 215-220

The purpose of the study was to investigate the possible effect of an environmental organochlorine, dichlorodiphenyldichloroethylene (p,p'-DDE), on male fertility assessed by main sperm variables ... [more ▼]

The purpose of the study was to investigate the possible effect of an environmental organochlorine, dichlorodiphenyldichloroethylene (p,p'-DDE), on male fertility assessed by main sperm variables, conducted through a case-control study on young men attending the andrology laboratory in the context of infertility investigation in the couple. Blood and semen samples were obtained from 73 young men considered as fertile based on semen analysis (controls) and 82 classified as subfertile or unfertile (cases). Standard clinical analysis of semen was performed and identification and quantification of p,p'-DDE in serum and in seminal plasma were done by gas chromatography. No p,p'-DDE was detected in the seminal plasma of either group. Blood concentration of p,p'-DDE in both groups was very low and did not differ between cases and controls; however, blood samples were obtained from 23 mothers in the control group, and from 19 in the case group, and p,p'-DDE serum level was significantly higher in the mothers of subfertile men. These data suggest that male infertility could be associated with exposure of the mothers to p,p'-DDE with deleterious effects restricted to intra-uterine life and thus undetected in blood or seminal plasma of subfertile men. [less ▲]

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See detailComparative study of different lipases acting on milk fat globule membrane monolayers.
Danthine, Sabine ULg; Blecker, Christophe ULg; Deroanne, Claude

Poster (2003, September)

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See detailComparative study of different output metrics for a three weakly coupled resonator sensor
Zhao, Chun; Wood, Graham; Xie, J.B. et al

in Proceedings of Solid-State Sensors, Actuators and Microsystems (Transducers 2015) (2015, July)

This work, for the first time, investigates the characteristics of different output metrics for a three degree-of-freedom (DoF) coupled resonator sensor. The main aspects examined are sensitivity and ... [more ▼]

This work, for the first time, investigates the characteristics of different output metrics for a three degree-of-freedom (DoF) coupled resonator sensor. The main aspects examined are sensitivity and linear range. It is shown from electrical measurements that using the vibration amplitude ratio as an output signal provides improved sensitivity and linearity range, compared to other methods such as shift in eigenstate, mode frequency or amplitude difference. [less ▲]

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See detailComparative study of durability test methods for pellets and briquettes
Temmerman, Michaël ULg; Rabier, Fabienne; Daugbjerg Jensen, Peter et al

in Biomass & Bioenergy (2006)

Different methods for the determination of the mechanical durability (DU) of pellets and briquettes were compared by international round robin tests including different laboratories. The DUs of five ... [more ▼]

Different methods for the determination of the mechanical durability (DU) of pellets and briquettes were compared by international round robin tests including different laboratories. The DUs of five briquette and 26 pellet types were determined. For briquettes, different rotation numbers of a prototype tumbler and a calculated DU index are compared. For pellets testing, the study compares two standard methods, a tumbling device according to ASAE S 269.4, the Lignotester according to O¨ NORM M 7135 and a second tumbling method with a prototype tumbler. For the tested methods, the repeatability, the reproducibility and the required minimum number of replications to achieve given accuracy levels were calculated. Additionally, this study evaluates the relation between DU and particle density. The results show for both pellets and briquettes, that the measured DU values and their variability are influenced by the applied method. Moreover, the variability of the results depend on the biofuel itself. For briquettes of DU above 90%, five replications lead to an accuracy of 2%, while 39 replications are needed to achieve an accuracy of 10%, when briquettes of DU below 90% are tested. For pellets, the tumbling device described by the ASAE standard allows to reach acceptable accuracy levels (1%) with a limited number of replications. Finally, for the tested pellets and briquettes no relation between DU and particle density was found. [less ▲]

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See detailComparative study of egg quality traits in two Belgian local breeds and two commercial lines of chickens
Moula, Nassim ULg; Antoine-Moussiaux, Nicolas ULg; Decuypere, Eddy et al

in Archiv Für Geglügelkunde = European Poultry Science = Revue de Science Avicole Européenne (2010), 74(3), 164-171

Detailed reference viewed: 128 (87 ULg)
See detailA comparative study of embryogenic and non-embryogenic cell cultures in Picea abies (L.) Karst.
Du Jardin, Patrick ULg; Chandelier, A.; Chauveau, F. et al

Book published by Elsevier (1996)

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See detailComparative study of experimental infection of piglets with a field strain of wild boar HEV, a wild boar HEV strain previously passed in porcine model and a swine HEV strain
Thiry, Damien ULg; Rose, Nicolas; Mauroy, Axel ULg et al

Poster (2015, October)

Domestic pig and wild boar are reservoirs for hepatitis E virus (HEV). This study aims to investigate the infection of pigs with HEV strains from wild boar and to compare the behaviour of a wild boar ... [more ▼]

Domestic pig and wild boar are reservoirs for hepatitis E virus (HEV). This study aims to investigate the infection of pigs with HEV strains from wild boar and to compare the behaviour of a wild boar strain to a pig strain in vivo. The objective is to contribute to the elucidation of the crossing barrier between wild boar and pig with this zoonotic virus. A total of 12 specific pathogen free piglets were divided into four groups and orally inoculated respectively with a wild boar HEV strain previously passed in pigs (WbHEV), a wild boar HEV (WbHEVs), a swine HEV (SwHEV) and a negative control group. One pig from each group was euthanized 15 days after inoculation. The remaining pigs were sacrificed on day 56. A serological monitoring by ELISA was realized throughout the experiment, the viral load was determined in different organs by qRT-PCR. Viral RNA was found in several organs and tissues of the inoculated pigs. Most of the pigs were HEV positive at the 15th day and no clinical signs were observed during infection. Liver enzymes (ALT and AST) remained within the reference values. This study provides experimental evidence of the swine infection with a strain of HEV isolated from wild boar and previously passed in pig. Furthermore, these data indicate the possibility of the transfer of the virus from wild boar to pig, for example, in the context of outdoor pig breeding. [less ▲]

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See detailA comparative study of finite strain formulations in the buckling of cruciform columns
Careglio, Claudio; Canales Cardenas, Cristian ULg; Garcia Garino, Carlos et al

Conference (2015, April)

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Peer Reviewed
See detailComparative study of four diagnostic methods of enzootic bovine leukemia.
Mammerickx, Marc; Burny, Arsène; Dekegel, D. et al

in Zentralblatt für Veterinarmedizin. Reihe B = Journal of Veterinary Medicine. Series B (1977), 24

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See detailComparative study of four diagnostic methods of enzootic bovine leukemia.
Mammerickx, Marc; Burny, Arsène; Dekegel, D. et al

in Burny, Arsène (Ed.) Bovine leucosis: various methods of molecular virology. (1977)

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See detailComparative study of four safflower oils (Carthamus tinctorius) varieties grown in eastern of Morocco
Ben Moumen, A.; Mansouri, F.; Zraibi, L. et al

Poster (2013, April)

Safflower (Carthamus tinctorius) is an oilseed crop, which, for many years, has been grown on a relatively small scale in parts of North Africa and Middle East (Purdy and al., 1959).

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See detailComparative study of four safflower oils (Carthamus tinctorius) varieties grown in eastern of Morocco
Ben Moumen, A.; Mansouri, F.; Zraibi, L. et al

in Book of Proceedings InsideFood Symposium (2013, April)

In this study, four safflower varieties, originating from Spain (Rancho), India (Sharda) and Morocco (Cartamar and Cartafri) cultivated at the experimental station of OUJDA (semi-arid region of Eastern ... [more ▼]

In this study, four safflower varieties, originating from Spain (Rancho), India (Sharda) and Morocco (Cartamar and Cartafri) cultivated at the experimental station of OUJDA (semi-arid region of Eastern Morocco) were evaluated for their oil yield and seed oil quality. The analysis of results revealed significant differences among varieties for all traits. Indeed, our result show that seeds of the four varieties have important oil content ranged between 35.38% (Rancho) and 28.84% (Cartamar). Characterization of these oils showed a low value of acidity index less than 0.7% for all the varieties but significant differences in their peroxide values ranged between 4.5 meq O2/Kg (Cartamar) and 31.21 mEqO2/Kg (Rancho) and high value of phenolic content between 143 ppm (Rancho) and 97 ppm (Sharda). Analysis of the fatty acids shows that linoleic acid is the main fatty acid ranged between 77.94% (Cartamar) and 79.98% (Sharda). Oils of those four varieties can be classified in the linoleic acid group. The analysis of triglycerides by HPLC shows 10 molecular species of TAG (LLL, LPL, LLO, PLO, LLS, POP, OOO, POO, SOO, PPL). The trilinoleate (LLL) is the main molecular species with more than 50%. Safflower seed oil cultivated in eastern Morocco presents good physicochemical proprieties (polyphenols and Omega 6 richness); therefore, safflower culture could be suggested for all areas of Morocco, including the areas of low pluviometry, while the potential for culture of other oilseeds is more limited. [less ▲]

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See detailComparative study of gold and silver based nanobiosensors
Lismont, Marjorie ULg; Dreesen, Laurent ULg

Poster (2011, May 25)

Due to their particular optical properties, resulting from the surface plasmon resonance (SPR) phenomenon, silver and gold nanoparticles (NPs) can be used as robust tools for optical biosensing [1 ... [more ▼]

Due to their particular optical properties, resulting from the surface plasmon resonance (SPR) phenomenon, silver and gold nanoparticles (NPs) can be used as robust tools for optical biosensing [1]. Optical SPR biosensors are able to measure complex formation in real time. Indeed, the SPR absorption spectrum band of the NPs is sensitive to the shape, size, inter-particle distance and composition of the NP as well as the dielectric properties of the surrounding medium [2]. Due to the sensitivity of SPR to the local dielectric environment, plasmonic NPs can act as transducers that convert small changes in the local refractive index and the inter-particle distance into spectral shifts and broadening in the absorption spectra bands [3]. In our study, the prototypical biocytin-avidin interaction was used to study gradual changes with time in the absorption spectra bands of biotinylated 10 nm silver and gold NPs as a function of added avidin. After avidin addition, a SPR red-shift and a broadening of the SPR bands were observed with both NPs. These optical changes evolved with time and reached their final values after around 45 min for each system. The maximum SPR red-shifts were equal to 25 nm and 15 nm for silver NPs and gold NPs, respectively. The detection limit, described as the lowest concentration for clear identification of wavelength shift due to biomolecular recognition, is determined to be 4 nM for both silver and gold NPs. The specificity of the biocytin-avidin biosensors was checked by replacing avidin by BSA. When BSA was added, we observed a SPR band shift which was smaller than the detection limit of 3 nm, attesting the biosensor selectivity. Our work demonstrates the superiority of Ag over Au NPs for the elaboration of biosensors based on SPR. [less ▲]

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Peer Reviewed
See detailComparative Study of High Bio-Availability Glaphenine and Paracetamol in Cervical and Lumbar Arthrosis
Urbin Choffray, D.; Crielaard, Jean-Michel ULg; Albert, Adelin ULg et al

in Clinical Rheumatology (1987), 6(4), 518-25

Seventy-eight patients, 40 suffering from cervical arthrosis and 38 from lumbar arthrosis, received for a period of two weeks paracetamol or a new preparation of glaphenine, in a double blind study. The ... [more ▼]

Seventy-eight patients, 40 suffering from cervical arthrosis and 38 from lumbar arthrosis, received for a period of two weeks paracetamol or a new preparation of glaphenine, in a double blind study. The two drugs were found to have the same efficiency on the subjective parameters but high bioavailability glaphenine seems to have an effectiveness in the range of articulatory movements, which is not found with paracetamol. The side effects were quite equivalent. [less ▲]

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Peer Reviewed
See detailA comparative study of isokinetic training using two brands of dynamometers
Croisier, Jean-Louis ULg; Herve, M. N.; Forthomme, Bénédicte ULg

in Abstract Book of the XIV International Congress on Sports Rehabilitation and Traumatology: «The Accelerated Rehabilitation of the Injured Athlete» (2005, April)

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See detailComparative study of mature and zymogen mite cysteine protease stability and pH unfolding.
Chevigne, A.; Dumez, Marie-Eve ULg; Dumoulin, Mireille ULg et al

in Biochimica et Biophysica Acta (2010), 1800(9), 937-945

BACKGROUND: Papain-like proteases (CA1) are synthesized as inactive precursors carrying an N-terminal propeptide, which is further removed under acidic conditions to generate active enzymes. METHODS: To ... [more ▼]

BACKGROUND: Papain-like proteases (CA1) are synthesized as inactive precursors carrying an N-terminal propeptide, which is further removed under acidic conditions to generate active enzymes. METHODS: To have a better insight into the mechanism of activation of this protease family, we compared the pH unfolding of the zymogen and the mature form of the mite cysteine protease Der p 1. RESULTS: We showed that the presence of the propeptide does not significantly influence the pH-induced unfolding of the catalytic domain but does affect its fluorescence properties by modifying the exposure of the tryptophan 192 to the solvent. In addition, we demonstrated that the propeptide displays weaker pH stability than the protease domain confirming that the unfolding of the propeptide is the key event in the activation process of the zymogen. GENERAL SIGNIFICANCE: Finally, we show, using thermal denaturation and enzymatic activity measurements, that whatever the pH value, the propeptide does not stabilize the structure of the catalytic domain but very interestingly, prevents its autolysis. [less ▲]

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See detailA Comparative Study of Models for Shear Strength of Reinforced Concrete Deep Beams
Liu, Jian ULg; Mihaylov, Boyan ULg

Scientific conference (2015, September 03)

The shear behaviour of deep reinforced concrete beams has been a focus of experimental and analytical studies since the early 1950s, resulting in different approaches for predicting the shear strength of ... [more ▼]

The shear behaviour of deep reinforced concrete beams has been a focus of experimental and analytical studies since the early 1950s, resulting in different approaches for predicting the shear strength of deep beams. This paper compares the main modelling assumptions of these approaches and summarizes the results from validation studies available in the literature. Based on these comparisons, a two-parameter kinematic theory (2PKT) and a mechanical model by Zararis are selected for further evaluation with the help of test series with different experimental variables. It is shown that both approaches predict the trends in beam series with varying shear-span-to-depth ratios, even though the mechanical model overestimates the shear strength of beams without web reinforcement. It is also shown that the two models differ significantly in capturing the effect of transverse reinforcement and the size effect in shear. While the 2PKT accounts for sliding shear failures which limit the effectiveness of transverse reinforcement beyond a certain reinforcement ratio, the mechanical model predicts a monotonic increase of shear strength with the ratio. The 2PKT is also shown to capture the size effect in shear observed in two series of tests well, while the mechanical model neglects this effect. [less ▲]

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See detailA comparative study of models for shear strength of reinforced concrete deep beams
Liu, Jian ULg; Mihaylov, Boyan ULg

in Engineering Structures (2016), 112(April), 81-89

Since the 1960s, researchers have proposed different empirical formulas and analytical models for the shear strength of deep reinforced concrete beams. Some of these approaches have shown adequate ... [more ▼]

Since the 1960s, researchers have proposed different empirical formulas and analytical models for the shear strength of deep reinforced concrete beams. Some of these approaches have shown adequate accuracy when applied to small sets of beam tests, while their ability to predict the effect of a large range of test variables remains unknown. This paper presents a summary of models for deep beams from 73 publications, and focuses on a detailed evaluation of ten more recent models by using a database of 574 deep beam tests. It is found that a semi-empirical strut-and-tie model (STM) and a two-parameter kinematic theory (2PKT) for deep beams produce the least scattered predictions. The former model produced an average shear strength experimental-to-predicted ratio Vexp/Vpred of 1.00 with a coefficient of variation (COV) of 19.8%, while the latter resulted in an average of 1.08 with a COV of 15.4%. The two models are also compared by plotting the Vexp/Vpred ratios against different tests variables, and by performing parametric studies with individual test series. It is shown that the semi-empirical STM exhibits certain bias with respect to the shear-span-to-depth ratio, while the 2PKT produces uniform results across the entire range of experimental data. It is also noted that the semi-empirical STM requires somewhat less computational effort than the 2PKT approach. [less ▲]

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