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See detailMeasurement of glucosinolates in rapeseeds.
Wathelet, Jean-Paul ULg; Marlier, M.; Severin, M. et al

in Natural toxins (1995), 3(4),

Several ring tests have been organized by the International Organisotion for Standardization (lSO) and the Measurement ônd Testing Programme (BCR) for improving glucosinolote methods Finally, HPLC of ... [more ▼]

Several ring tests have been organized by the International Organisotion for Standardization (lSO) and the Measurement ônd Testing Programme (BCR) for improving glucosinolote methods Finally, HPLC of desulphoglucosinolates is recommended by lSO, the European Committee for Standardizotion (CEN), and the European Commission (EC) as the official method. X-ray fluorescence has also become particularly common for fast analysis. After checking stability of intact glucosinolates in whole rapeseeds, the BCR has three reference materials (CRM 366, CRM 190, CRM 367) avai able, certified for their total glucosinolate and sulphur contents. Currently, the Measurement and Testing Programme is supporting a research project concerning the stdbility of desulphoglucosinolates and intact glucosinolates extracts. At the present time, best results were observed with lyophilized extracts sealed in brown glass ampoules and stored at 18'C. [less ▲]

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See detailMeasurement of Halogenated Contaminants in Human Serum and Milk using GCxGC-IDTOFMS
Focant, Jean-François ULg; sjodin; Turner et al

Conference (2004, September)

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See detailMeasurement of human levels of Dechlorane 602 by CZC-NCI-HRTOFMS
Brasseur, Catherine ULg; PIRARD, Catherine ULg; L'Homme, Benjamin ULg et al

in Organohalogen Compounds (2012, August), 74

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See detailMeasurement of insulin sensitivity by the minimal model method using a simplified intravenous glucose tolerance test: validity and reproducibility.
Duysinx, Bernard ULg; Scheen, André ULg; Gerard, Pascale ULg et al

in Diabète & Métabolisme (1994), 20(4), 425-32

This study aimed at testing whether 12 rather than 26 plasma glucose and insulin determinations can be used to calculate the indices of insulin sensitivity and of glucose effectiveness using Bergman's ... [more ▼]

This study aimed at testing whether 12 rather than 26 plasma glucose and insulin determinations can be used to calculate the indices of insulin sensitivity and of glucose effectiveness using Bergman's minimal model during a simple intravenous glucose tolerance test performed without tolbutamide injection. Two intravenous glucose tolerance tests (separated by 1 week) were performed in 7 lean normal subjects and a single test was performed in 9 severely obese non-diabetic subjects. Intra-subject reproducibility of insulin sensitivity was not significantly different when 26 or 12 time-points were analyzed (CV = 16.8 +/- 3.4 versus 18.9 +/- 3.8% respectively). Compared with the insulin sensitivity of the lean subjects, that of obese subjects was significantly (P < 0.001) and similarly reduced when using 12 (2.14 +/- 0.34 versus 7.97 +/- 1.29 10(-4)min-1/mU.1-1) rather than 26 determinations (2.13 +/- 0.42 versus 6.95 +/- 1.12 10(-4) min-1/mU.1-1) respectively. Glucose effectiveness was less reproducible than insulin sensitivity and was slightly diminished by the reduction of blood samples (relative error: -9.7 +/- 4.4%; P < 0.05). Finally, glucose effectiveness tended to be slightly lower in the morbidly obese subjects than in the lean controls with both modes of calculation. In conclusion, in non-diabetic subjects, the insulin sensitivity index can be accurately measured during a simple intravenous glucose tolerance test, without tolbutamide injection and with only 12 blood samples. The possibility of performing a simplified test should contribute to increase the use of the minimal model method for estimating insulin sensitivity in clinical practice. [less ▲]

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See detailMeasurement of leg blood flow in calves by the thermodilution method : a technical study
Mc Entee, K; Amory, Hélène ULg; Genicot, B et al

in Archives Internationales de Physiologie et de Biochimie (1992)

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See detailMeasurement of lifetimes by laser-induced fluorescence and determination of transition probabilities of astrophysical interest in NdIII
Zhang, Z. G.; Svanberg, S.; Palmeri, P. et al

in Astronomy and Astrophysics (2002), 385(2), 724-732

Selective lifetime measurements by time-resolved laser-induced fluorescence spectroscopy for 5 levels belonging to the 4f(3)5d configuration of doubly ionized neodymium provide a first and useful ... [more ▼]

Selective lifetime measurements by time-resolved laser-induced fluorescence spectroscopy for 5 levels belonging to the 4f(3)5d configuration of doubly ionized neodymium provide a first and useful experimental test of the relativistic Hartree-Fock calculations in this ion of astrophysical interest. As a consequence, the accuracy of the transition probabilities deduced in the present work is well assessed. These new data are expected to help astrophysicists in the future to refine the analysis of the composition of chemically peculiar stars which frequently show large overabundances of lanthanides when compared to the solar system standards. [less ▲]

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See detailMeasurement of liquid hold-up in catalytic structured packings: comparison of different experimental techniques
Viva, Aurora ULg; Aferka, Saïd ULg; Toye, Dominique ULg et al

in de Haan, A. B.; Kooijman, H.; Gorak, A. (Eds.) Proceedings of 9th Distillation and Absorption Conference (DA2010), Eindhoven, Pays-Bas, 12-15 septembre 2010 (2010)

This paper presents the results of an experimental study carried out to examine liquid hold-up in 100 mm diameter catalytic structured packing Katapak-SP. Two versions of the packing have been ... [more ▼]

This paper presents the results of an experimental study carried out to examine liquid hold-up in 100 mm diameter catalytic structured packing Katapak-SP. Two versions of the packing have been investigated. Both global and local measurements were carried out on the very same packings, using water at ambient conditions as working liquid. To this scope, traditional methods like draining techniques were used to obtain global hold-up values. A non-intrusive high energy X-ray tomography was used for gathering information on local scale and study axial distribution of the liquid hold-up over the packed column, inside and outside the catalyst containing baskets. The total liquid hold-up of the catalytic packed bed was evaluated by averaging hold-up values obtained at different cross sections over the corresponding volume. Very good agreement was found between global values estimated with the different techniques. The experimental results are useful for supporting theoretical developments in hydrodynamic and mass transfer modeling. [less ▲]

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See detailMeasurement of mammalian histone deacetylase activity.
Verdin, Eric; Dequiedt, Franck ULg; Fischle, Wolfgang et al

in Methods in Enzymology (2004), 377

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See detailMeasurement of momentum transfer caused by a groyne in compound channel
Peltier, Yann ULg; Proust, S.; Thollet, F. et al

in 33rd IAHR Congr.: Water Engineering for a Sustainable Environment (2009)

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See detailMeasurement of myoglobin in myocardial necrosis and reperfusion
Chapelle, Jean-Paul ULg

Conference (1993, October 08)

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See detailMeasurement of ovine pregnancy-associated glycoprotein (PAG) during early pregnancy in Lacaune sheep
El Amiri, B.; Karen, A.; Sulon, Joseph ULg et al

in Reproduction in Domestic Animals (2007), 42(3), 257-262

This study describes ovine pregnancy-associated glycoprotein (ovPAG) concentrations in 20 Lacaune sheep during early pregnancy. Measurements were performed by using semi-purified ovPAG as standard, tracer ... [more ▼]

This study describes ovine pregnancy-associated glycoprotein (ovPAG) concentrations in 20 Lacaune sheep during early pregnancy. Measurements were performed by using semi-purified ovPAG as standard, tracer and immunogens for antibody production in rabbits. Antisera R780 (against ovPAG(57+59kDa)) and R805 (against ovPAG5(58+61kDa)) were used respectively in RIA-780 and RIA-805. Blood samples were collected at days 0, 18, 20, 22 and 25 after artificial insemination. From day 18 after breeding onward, the mean ovPAG concentration was significantly higher (p < 0.001) in plasma samples from pregnant ewes (n = 17) than in non-pregnant ones (n = 3). The specific activity of the tracer was 11 760 Ci/mmol in RIA-780 and 14 900 Ci/mmol in RIA-805. The minimal detection limits for RIA-780 and RIA-805 were 0.2 ng/ml and 0.3 ng/ml, respectively. The intra-assay CV of samples with low (1.0 ng/ml), medium (2.5 ng/ml) and high (4.0 ng/ml) PAG concentrations were 3%, 6% and 9% for RIA-780 and 8%, 9% and 5% for RIA-805. The inter-assay CV in the same samples were 13%, 12% and 7% for RIA-780 and 13%, 11% and 5% for RIA-805. The recovery was higher than 95% in both assays. No cross-reaction was observed with members of aspartic proteinase family as well as with other tested proteins. In both RIA-780 and RIA-805, inhibition of the binding of the tracer by antisera was parallel between standard curve and serial dilutions of pregnant ewe samples. In conclusion, the two homologous RIA systems are suitable for early quantification of ovPAG concentrations in ewe plasma samples from day 18 after breeding. [less ▲]

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See detailMeasurement of oxygen consumption and cardio-respiratory parameters in ridden horse
Votion, Dominique ULg; Caudron, Isabelle; Lejeune, jean-Philippe et al

in Pferdeheilkunde (2006, August), 22(5), 619-624

This study aimed at testing the feasibility of using the Cosmed K4 b2® portable telemetric gas analysis system to record metabolic parameters in ridden exercising horses. Adaptation of the Cosmed K4 b2® ... [more ▼]

This study aimed at testing the feasibility of using the Cosmed K4 b2® portable telemetric gas analysis system to record metabolic parameters in ridden exercising horses. Adaptation of the Cosmed K4 b2® to horses’ specificities included the design of an airtight face-mask (Equimask®) adapted to a hackamore bridle to allow ridding the horse. The portable system enables the recording of tidal volume (VT), respiratory rate (RR), minute expired volume (VE), pulmonary oxygen uptake (VO2), carbon dioxide delivery (VCO2), heart rate (HR) and speed. Four saddle horses equipped with the system completed 3 treadmill tests (TT1 to TT3) and 1 field test (FT) consisting of galloping phases at incremental speeds. Horses were sampled for blood lactate (LA) during the tests. The successive treadmill tests showed the influence of stress on measurements: with horses becoming accustomed to treadmill, LA and HR were reduced between TT1 and TT3. As VO2 is related to cardiovascular function, influence of stress resulted in higher VO2 in TT1 vs. TT3. The VO2 reached at maximal speed during treadmill tests was lower than the expected maximal aerobic power (VO2max) for trained saddle horses. During FT, the VO2 reached at the final gallop was lower than the VO2 recorded during any of the treadmill tests thus reflecting the increasing difficulty to reach VO2max with ridden horses in field conditions. This study demonstrated that cardiorespiratory parameters may be obtained in ridden horses during a field trial and opens new perspectives in the follow-up of sport horses in real field conditions. [less ▲]

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See detailMeasurement of PCB-153 and DDE in 20 μL dried-blood spots
L'Homme, Benjamin ULg; Focant, Jean-François ULg

in Organohalogen Compounds (2012), 74

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See detailMeasurement of PCDDs, PCDFs, and non-ortho-PCBs by comprehensive two-dimensional gas chromatography-isotope dilution time-of-flight mass spectrometry (GC x GC-IDTOFMS)
Focant, Jean-François ULg; Reiner, Eric J.; MacPherson, Karen et al

in Talanta (2004), 63(5), 1231-1240

Comprehensive two-dimensional gas chromatography with isotope-dilution time-of-flight mass spectrometry (GC x GC-IDTOFMS) was used to measure polychlorinated dibenzo-p-dioxin (PCDD), polychlorinated ... [more ▼]

Comprehensive two-dimensional gas chromatography with isotope-dilution time-of-flight mass spectrometry (GC x GC-IDTOFMS) was used to measure polychlorinated dibenzo-p-dioxin (PCDD), polychlorinated dibenzofuran (PCDF), and coplanar polychlorinated biphenyl (cPCB) concentrations in ash, sediment, vegetation, and fish samples. The GC x GC capability was achieved by using a quad jet, dual stage, thermal modulator. Zone compression of the GC peaks from modulation resulted in a significant increase of the signal intensity over classical GC-IDTOFMS. The GC x GC column set used an Rtx-Dioxin 2 phase as the first dimension (D-1) and an Rtx-500 as the second dimension (D-2). The chromatographic separation of the 17 PCDD/Fs and the 4 cPCBs was attained in D-1 except for 2,3,7,8-TCDD and CB126 for which deconvoluted ion currents (DIC) were required to be reported separately. The Rtx-500 phase separated the bulk matrix interfering compounds from the target analytes in D-2. The instrumental limit of detection (iLODs) was 0.5 pg for 2,3,7,8-TCDD. The calibration curves showed good correlation coefficients for all the compounds investigated in the concentration range of 0.5-200 pg. GC x GC-IDTOFMS results compared favorably to those from conventional isotope-dilution one-dimensional gas chromatography-high resolution mass spectrometry (GC-IDHRMS). The comprehensive mass analysis of the TOFMS further permitted the identification of other contaminants of concern in the samples. (C) 2004 Elsevier B.V. All rights reserved. [less ▲]

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See detailMeasurement of progesterone concentration in plasma samples: comparison of three radioimmunoassay procedures
Legras, B.; Beckers, Jean-François ULg; Sulon, J.

in Reproduction (Cambridge, England). Abstract Series (2004), 31

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See detailMeasurement of proteoglycans, elastase, collagenase and protein in synovial fluid in inflammatory and degenerative arthropathies
Gysen, Ph; Malaise, Michel ULg; Gaspar, S. et al

in Clinical Rheumatology (1985), 4(1), 39-50

The number of leucocytes and the concentrations of protein, proteoglycans (PG), elastase a1 proteinase inhibitor complexes and collagenolytic activity were measured in the synovial fluid (SF) of 15 ... [more ▼]

The number of leucocytes and the concentrations of protein, proteoglycans (PG), elastase a1 proteinase inhibitor complexes and collagenolytic activity were measured in the synovial fluid (SF) of 15 patients with rheumatoid arthritis (RA) and 18 with osteoarthritis (OA). The mean levels of protein and collagenase and the number of leucocytes were higher in RA than in OA SF. However, the mean level of PG was higher of OA SF than in RA. In the latter, they were principally in the form of monomers and fragments while in the former they were in the form of aggregates and monomers. There was a direct relationship between the concentration of E-a/Pi and either the number of white cells or the concentration of synovial proteins, suggesting that the measurement of E-a/Pi complexes is a biochemical index of the local inflammatory reaction. There was an inverse correlation between the concentrations ofPG and E-a/Pi which may reflect the effect of degradation in PG of elastase and other enzymes released at the same time. Finally, there was a direct relationship between the concentration of E-a/Pi and collagenase which may be the reflection of a simultaneous release of various enzymes from leucocytes and macrophages. [less ▲]

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See detailMeasurement of pulmonary inertance in Equids
Art, Tatiana ULg; Lekeux, Pierre ULg; Gustin, Pascal ULg et al

in European Respiratory Journal (1989), 2

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