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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 edible insect acceptance between Vietnam and Belgium and potentiality of cricket breeding in Southern Vietnam (Ho Chi Minh City)
Detilleux, Loïc ULg

Master's dissertation (2016)

Humanity has to face major problems such as population growth, forcing humans to find food alternatives. Insect consumption is part of these alternatives and this work aims to study production and ... [more ▼]

Humanity has to face major problems such as population growth, forcing humans to find food alternatives. Insect consumption is part of these alternatives and this work aims to study production and consumption aspects of this practice. On the one hand, eight diets, made of feed (chicken or fish feed) alone or with an extra feed (elephant grass, carrots or sweet potatoes), were tested in Vietnam during a breeding of Gryllus bimaculatus De Geer 1773 (Orthoptera: Gryllidae). The goal of this study was to find a diet at the lowest cost which could provide the best results in terms of mortality, final weight, fertility and protein, lipid, ash and carbohydrate contents. On the other hand, insect tasting sessions were organised both in Vietnam and in Belgium in order to study and to compare consumer acceptance and to determine the development potential of this practice in each country. The results of the breeding show that no experimental diet differentiate clearly from others when all factors were taken into account and extra feed did not bring nutritional advantage. Concerning consumption aspect, Vietnamese and Belgian respondents seemed to be ready to consume insects in the future. Surrounding insects with a fritter dough allowed to improve a series of parameters as taste, texture, smell and aspect of the preparation. The benefit of tasting sessions was also highlighted because they allow participants to make their own opinion which was generally positive in this study. [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

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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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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 detailA comparative study of four thick photoresists for MEMS applications
Koukharenka, A; Kraft, Michael ULg; Ensell, G et al

in Journal Material Science: Materials in Electronics (2005), 16(11-12),

This work reports on recent advances in microfabrication process technology for medium to high-aspect ratio structures realised by UV photolithography using different kinds of photoresists. The resulting ... [more ▼]

This work reports on recent advances in microfabrication process technology for medium to high-aspect ratio structures realised by UV photolithography using different kinds of photoresists. The resulting structures were used as moulds and will be translated into metallic structures by electroplating. We used four types of photoresists: SPR 220-7 novalak based (positive), SU8 epoxy based (negative), Ordyl P-50100 acrylate based (negative) dry film photoresist, and Diaplate 132 acrylate based wet photoresist (negative). The motivation for this work was to find an alternative to SU-8 photoresist, which is difficult to process and remove after electroplating. Depending on the application, we found that Ordyl P-50100 dry film photoresist is the best alternative to SU8 for realization of approximately 100 µm deep moulds for electroplating in acidic electroplating solution. SPR 220-7 is a good alternative to SU8 for fabrication of 50 µm deep moulds and electroplating in alkaline solutions. The results presented in this paper will open up new possibilities for low-cost processes using electroplating for MEMS applications. [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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See detailA comparative study of guided vs pure self-treatment for premature ejaculation
Kempeneers, Philippe ULg; ANDRIANNE, Robert ULg; Cuddy, Marion et al

in Sexual and Relationship Therapy (2017)

Self-treatments have previously shown some efficacy in treating premature ejaculation (PE). It has been hypothesized that adding professional support to cognitive-behaviour bibliotherapy could improve ... [more ▼]

Self-treatments have previously shown some efficacy in treating premature ejaculation (PE). It has been hypothesized that adding professional support to cognitive-behaviour bibliotherapy could improve self-treatment outcomes. Therefore, the aim of this study was to compare treatment outcomes for participants with PE who used bibliotherapy alone (pure self-treatment) versus those who used the bibliotherapy with brief support from a health professional (guided self-treatment). Health professionals were not experienced sex therapists, but had attended a short training session in order to equip them to support the self-help process. 135 men reporting difficulties with PE were recruited between February and June 2013. Seventy-one (52.59%) completed the protocol: 37 in the pure self-treatment condition, 34 in the guided self-treatment condition. Thirty-five participants (50%) met criteria for ISSM definition of lifelong PE, 14 (20%) for acquired PE, and 22 (30%) presented other forms of PE complaints. At 4-8 months post-treatment, improvements were found in both groups and in each subtype of PE on self-reported measures of sexual functioning and sexual cognitions. Univariate analyses indicated slightly greater treatment effects in the guided self-treatment group, but multivariate tests failed to identify a significant effect of therapist support. These mixed findings raise questions regarding the amount and quality of therapist input used in this study, and also about a possible ceiling effect of cognitive-behaviour therapy for PE. [less ▲]

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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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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 ▲]

Detailed reference viewed: 45 (7 ULg)