Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailQuantitative modeling of Sr, Ca, Rb, K in the Bjerkreim-Sokndal lopolith (S.W. Norway)
Duchesne, Jean-Clair ULg

in Contributions to Mineralogy & Petrology (1978), 66

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailQuantitative morphological studies of mesoporous catalysts at nanometer scale resolution
Ziese, Ulrike; Gommes, Cédric ULg; Blacher, Silvia ULg et al

in Studies in Surface Science and Catalysis (2005), 158

We have combined electron tomography with posterior image processing for a quantitative morphological study of mesoporous catalysts at nanometer scale resolution. As a first example for the possibilities ... [more ▼]

We have combined electron tomography with posterior image processing for a quantitative morphological study of mesoporous catalysts at nanometer scale resolution. As a first example for the possibilities of the approach, pore size distributions of single particles of commercial USY and XVUSY zeolites were derived. [less ▲]

Detailed reference viewed: 53 (1 ULg)
See detailQuantitative multi-parameter mapping in parkinson’s disease: preliminary results
Rouillard, Maud ULg; D'Ostilio, Kevin ULg; Albinet, Cedric et al

Poster (2014, May)

Detailed reference viewed: 19 (5 ULg)
Full Text
Peer Reviewed
See detailQuantitative nephelometric assay for determining myoglobin evaluated
Delanghe, J. R.; Chapelle, Jean-Paul ULg; Vanderschueren, S. C.

in Clinical Chemistry (1990), 36(9), 1675-8

A recently introduced automated nephelometric immunoassay involving shell/core particles for determination of myoglobin (Behringwerke) was evaluated with the BNA Nephelometer. Method precision was good ... [more ▼]

A recently introduced automated nephelometric immunoassay involving shell/core particles for determination of myoglobin (Behringwerke) was evaluated with the BNA Nephelometer. Method precision was good: the intra-assay CV varied between 1.5% and 6.1%; with daily calibration, the interassay CV ranged between 1.5% and 7.5%. For usual sample dilutions, the assay response varied linearly with myoglobin concentrations up to 23.1 nmol/L. After automatic dilution by the instrument, concentrations up to 2310 nmol/L could be measured without high-dose "hook" effect. Further manual dilution allowed measurement of myoglobin concentrations up to 26,000 nmol/L. Calibration was stable for at least seven days. We detected no significant interferences from hemoglobin, haptoglobin, bilirubin, iodine-containing contrast media, and rheumatoid factors. Treating lipemic samples with Lipoclean (Behringwerke) decreased test results. Simultaneously drawn serum and plasma samples from the same subject showed no consistent differences in myoglobin concentrations. The mean reference myoglobin concentration was 1.380 (SD 0.82) nmol/L for men and 0.878 (SD 0.45) nmol/L for women. In patients with renal insufficiency, serum creatinine values were moderately related to serum myoglobin values (r = 0.465). Although a commercial radioimmunoassay (Byk-Sangtec) and the nephelometric assay intercorrelated well (r = 0.929), values obtained by nephelometry were significantly lower (P less than 0.05). By both assays, results for heart and skeletal muscle tissue extracts showed no correlation, a finding that suggests the existence of multiple forms of myoglobin in human tissues. We conclude that immunonephelometry is a rapid, practical, and reliable method for measuring myoglobin in serum. [less ▲]

Detailed reference viewed: 5 (1 ULg)
See detailQuantitative NIR Spectroscopy of Massive Stars
Sana, H.; Stap, F. A.; de Koter, A. et al

in Astronomical Society of the Pacific Conference Series (2013, January 01)

Interest for near-infrared (NIR) spectroscopy of massive stars has been dramatically increasing over the last decade. Because it allows one to observe objects inaccessible at optical wavelengths due to ... [more ▼]

Interest for near-infrared (NIR) spectroscopy of massive stars has been dramatically increasing over the last decade. Because it allows one to observe objects inaccessible at optical wavelengths due to absorption, the infrared domain offers a privileged window to study highly extinguished objects. Yet, a detailed calibration of the massive star properties at NIR wavelength is still missing. Following the lines of the work of Repolust et al. (2005), we have acquired high resolution spectroscopy of several nearby massive stars using VLT/CRIRES, focusing on spectral lines of interest in the J, H, K, and L bands. In this work, we present the earliest results of our quantitative spectroscopic analysis of the main sequence stars in our sample. Using the unique combination of a genetic algorithm approach with the state-of-the-art non-LTE atmosphere model FASTWIND, we compare the stellar and wind properties as derived from the optical and the NIR regime. [less ▲]

Detailed reference viewed: 15 (4 ULg)
Full Text
Peer Reviewed
See detailQuantitative onvergence analysis of multi-agent systems
tuna, S. E.; Sepulchre, Rodolphe ULg

in Proceedings of the 7th IFAC Symposium on Nonlinear Control Systems (2007, August)

We introduce a characterization of contraction for bounded convex sets. For discrete-time multi-agent systems we provide an explicit upperbound on the rate of convergence to a consensus under the ... [more ▼]

We introduce a characterization of contraction for bounded convex sets. For discrete-time multi-agent systems we provide an explicit upperbound on the rate of convergence to a consensus under the assumptions of contractiveness and (weak) connectedness (across an interval). Convergence is shown to be exponential when either the system of the function characterizing the contraction is linear [less ▲]

Detailed reference viewed: 6 (0 ULg)
Full Text
See detailQuantitative palynology in late and latest Famennian swamp environments, an accurate tool for marine / non-marine correlation.
Streel, Maurice ULg

in Newsletter. Subcommission on Devonian Stratigraphy (1998), 15

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailQuantitative palynology of Famennian events in the Ardenne-Rhine Regions.
Streel, Maurice ULg

in Abhandlungen der Geologischen Bundesanstalt (1999), 54

Detailed reference viewed: 25 (1 ULg)
Full Text
See detailQuantitative palynology of latest Famennian events in the Sauerland.
Streel, Maurice ULg

in Newsletter. Subcommission on Devonian Stratigraphy (1998), 15

Detailed reference viewed: 15 (0 ULg)
See detailQuantitative palynology, a tool for characterizing mud
Roche, M.; Steemans, Philippe ULg; Streel, Maurice ULg

Conference (1990)

Detailed reference viewed: 4 (0 ULg)
Full Text
See detailA quantitative point of view of the concept of vulnerability
Brouyère, Serge ULg

in Zwahlen, François (Ed.) Vulnerability and risk mapping for the protection of carbonate (karst) aquifers, COST620 final report (2004)

Detailed reference viewed: 47 (4 ULg)
Full Text
Peer Reviewed
See detailQuantitative proteomic analysis to decipher the differential apoptotic response of bortezomib-treated APL cells before and after retinoic acid differentiation reveals involvement of protein toxicity mechanisms.
Uttenweiler-Joseph, Sandrine; Bouyssié, David; Calligaris, David ULg et al

in Proteomics (2013), 13

The ubiquitin-proteasome system allows the targeted degradation of proteins and plays a critical role in the regulation of many cellular processes. Proteasome inhibition is a recent antitumor therapeutic ... [more ▼]

The ubiquitin-proteasome system allows the targeted degradation of proteins and plays a critical role in the regulation of many cellular processes. Proteasome inhibition is a recent antitumor therapeutic strategy and bortezomib was the first proteasome inhibitor approved for clinical use. In this study, we used the NB4 cell line to investigate the effects of bortezomib toward acute promyelocytic leukemia cells before and after retinoic acid-induced differentiation. We showed that apoptosis level after bortezomib treatment is higher in NB4 cells than in differentiated NB4 cells. To compare early protein variations upon bortezomib treatment in both NB4 cell populations, we performed a quantitative proteomic analysis based on iTRAQ peptide labeling followed by data analysis with in-house developed scripts. This strategy revealed the regulation of 14 proteins principally involved in protein stress response and apoptosis in NB4 cells after proteasome inhibition. Altogether, our results suggest that the differential level of apoptosis induced by bortezomib treatment in both NB4 cell populations could result from distinct protein toxicity level. [less ▲]

Detailed reference viewed: 19 (1 ULg)
See detailQuantitative Real-time PCR as a useful method to detect large menin gene deletions
Filieri, C.; Tagliati, F.; Tichomirova, M. et al

in European Neuroendocrine Association - Liège, 22-25 septembre 2010 (2010, September)

Detailed reference viewed: 12 (6 ULg)
Peer Reviewed
See detailQuantitative Relationship between Sensitivity to Beta-Lactam Antibiotics and Beta-Lactamase Production in Gram-Negative Bacteria--II. Non-Steady-State Treatment and Progress Curves
Frère, Jean-Marie ULg; Joris, Bernard ULg; Crine, Michel ULg et al

in Biochemical Pharmacology (1989), 38(9), 1427-33

A non-steady-state model is discussed for the study of the interplay between beta-lactamase activity and outer membrane permeability with slowly hydrolysed beta-lactams. The analysis shows: (1) that the ... [more ▼]

A non-steady-state model is discussed for the study of the interplay between beta-lactamase activity and outer membrane permeability with slowly hydrolysed beta-lactams. The analysis shows: (1) that the simple, steady-state model presented in the accompanying paper remains valid as long as kcat (i.e. k3 with chromosome-encoded class C beta-lactamases) is larger than 10(-3)/sec (generation time = 20 min or more); (2) that among the beta-lactam antibiotics studied here, the complete, non-steady-state model needs only be used in the case of aztreonam; (3) that the term "trapping" should be replaced by "formation of a covalent acyl-enzyme" and that such a phenomenon only contributes significantly to the resistance when penetration and hydrolysis are very slow and the periplasmic beta-lactamase concentration is very high. Aztreonam seems to be the only compound which fulfils the first two conditions. [less ▲]

Detailed reference viewed: 18 (8 ULg)
Full Text
Peer Reviewed
See detailQuantitative risk assessment of Campylobacter spp. in poultry based meat preparations as one of the factors to support the development of risk-based microbiological criteria in Belgium
Uyttendaele, Mieke; Baert, Katleen; Ghafir, Yasmine et al

in International Journal of Food Microbiology (2006), 111(2), 149-163

The objective of this study was to do an exercise in risk assessment on Campylobaeter spp. for poultry based meat preparations in Belgium. This risk assessment was undertaken on the demand of the ... [more ▼]

The objective of this study was to do an exercise in risk assessment on Campylobaeter spp. for poultry based meat preparations in Belgium. This risk assessment was undertaken on the demand of the competent national authorities as one of the supportive factors to define fisk-based microbiological criteria. The quantitative risk assessment model follows a retail to table approach and is divided in different modules. The contamination of raw chicken meat products (CMPs) was represented by a normal distribution of the natural logarithm of the concentration of Campylobacter spp. (In[Camp]) in raw CMPs based on data from surveillance programs in Belgium. To analyse the relative impact of reducing the risk of campylobacteriosis associated with a decrease in the Campylobacter contamination level in these types of food products, the model was run for different means and standard deviations of the normal distribution of the ln[Camp] in raw CMPs. The limitation in data for the local situation in Belgium and on this particular product and more precisely the semi-quantitative nature of concentration of Campylobacter spp. due to presence/absence testing, was identified as an important information gap. Also the knowledge on the dose-response relationship of Campylobacter spp. was limited, and therefore three different approaches of dose-response modelling were compared. Two approaches (1 and 2), derived from the same study, showed that the reduction of the mean of the distribution representing the ln[Camp] in raw CMPs is the best approach to reduce the risk of Campylobacter spp. in CMPs. However, for the simulated exposure and approach 3 it was observed that the reduction of the standard deviation is the most appropriate technique to lower the risk of campylobacteriosis. Since the dose-response models used in approach I and 2 are based on limited data and the reduction of the mean corresponds with a complete shift of the contamination level of raw CMPs, demanding high efforts from the poultry industry, it is proposed to lower the standard deviation of the concentration of Campylobacter spp. in raw CMPs. This proposal corresponds with the elimination of the products that are highly contaminated. Simulation showed that eating raw chicken meat products can give rise to exposures that are 10(10) times higher than when the product is heated, indicating that campaigns are important to inform consumers about the necessity of an appropriate heat treatment of these type of food products. (c) 2006 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 128 (10 ULg)
Full Text
Peer Reviewed
See detailQuantitative short-term study of Anal sphincter function after chemoradiation for rectal cancer
Gervaz, Pascal; Rotholtz, Nicolas; Pisano, Michele et al

in Langenbeck's Archives of Surgery (2001), 136

Hypothesis: Pelvic irradiation adversely affects anal sphincter function after proctectomy with coloanal anastomosis for low rectal and middle rectal (,10 cm from the anal verge) tumors. Design: Case ... [more ▼]

Hypothesis: Pelvic irradiation adversely affects anal sphincter function after proctectomy with coloanal anastomosis for low rectal and middle rectal (,10 cm from the anal verge) tumors. Design: Case-control study. Setting: Private, tertiary care referral center. Patients: Patients treated for low rectal adenocarcinoma between January 1, 1994, and October 31, 1999. Interventions: Anal manometric data were prospectively collected at the time of initial diagnosis and before ileostomy closure. Main Outcome Measures: Mean and maximum resting pressures (RPs) and squeeze pressures, threshold volume for sensation, and maximal tolerable volume. Results: Twenty-three patients in the surgery group and 19 in the chemoradiotherapy group were considered for [less ▲]

Detailed reference viewed: 20 (1 ULg)