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See detailThe monitoring of the ionospheric activity using GPS measurements
Warnant, René ULg; Stankov, Stanimir; Jodogne, Jean-Claude et al

in Proceedings of the COST271 2002 workshop (2003)

Detailed reference viewed: 10 (0 ULg)
See detailMonitoring of the variability and long-term evolution of tropospheric constituents by Infrared solar absorption spectrometry at the Jungfraujoch, Switzerland.
Zander, Rodolphe ULg; Mahieu, Emmanuel ULg; Duchatelet, Pierre ULg et al

in Borrell, P.; Borrell, P. M.; Burrows, J. P. (Eds.) et al Sounding the Troposphere from Space: A new era for Atmospheric Chemistry. (2003)

Detailed reference viewed: 5 (1 ULg)
Peer Reviewed
See detailMonitoring of triclabendazole efficacy in naturally infected cattle using an antigen competition ELISA
Leclipteux, T.; Bossaert, K.; Protz, M. et al

Poster (1997)

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See detailMonitoring of urea and potassium by reverse iontophoresis in vitro
Wascotte, Valentine; Delgado-Charro, Begona; Rozet, Eric ULg et al

in Pharmaceutical Research (2007), 24(6), 1131-1137

Purpose. Reverse iontophoresis is an alternative to blood sampling for the monitoring of endogenous molecules. Here, the potential of the technique to measure urea and potassium levels non-invasively, and ... [more ▼]

Purpose. Reverse iontophoresis is an alternative to blood sampling for the monitoring of endogenous molecules. Here, the potential of the technique to measure urea and potassium levels non-invasively, and to track their concentrations during hemodialysis, has been examined. Materials and Methods. In vitro experiments were performed to test (a) a series of subdermal urea and potassium concentrations typical of the pathophysiologic range, and (b) a decreasing profile of urea and potassium subdermal concentrations to mimic those which are observed during hemodialysis. Results. (a) After 60-120 min of iontophoresis, linear relationships (p < 0.05) were established between both urea and potassium fluxes and their respective subdermal concentrations. The determination coefficients were above 0.9 after 1 h of current passage using sodium as an internal standard. (b) Reverse iontophoretic fluxes of urea and K+ closely paralleled the decay of the respective concentrations in the subdermal compartment, as would occur during a hemodialysis session. Conclusions. These in vitro experiments demonstrate that urea and potassium can be quantitatively and proportionately extracted by reverse iontophoresis, even when the subdermal concentrations of the analytes are varying with time. These results suggest the non-invasive monitoring of urea and potassium to diagnose renal failure and during hemodialysis is feasible, and that in vivo measurements are warranted. [less ▲]

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See detailMonitoring of Yersinia enterocolitica in murine and bovine feces on the basis of the chromosomally integrated luxAB marker gene
Kaniga, K.; Sory, M. P.; Delor, I. et al

in Applied and Environmental Microbiology (1992), 58(3), 1024-1026

We previously integrated the luxAB gene into the Yersinia enterocolitica chromosome. In this article, we assessed, by luminometry, the survival of the engineered strain KNG1024 in the digestive tracts of ... [more ▼]

We previously integrated the luxAB gene into the Yersinia enterocolitica chromosome. In this article, we assessed, by luminometry, the survival of the engineered strain KNG1024 in the digestive tracts of mice and cows. In situ detection and a count of the released strain were performed on feces from orally inoculated BALB/c mice for 24 days. This method is a rapid and reliable system for long-term monitoring of genetically engineered bacteria. In cow feces, the count of Y. enterocolitica ranged from 210 to 6,000 CFU/g of feces. This very low count was not detectable by direct luminometry [less ▲]

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See detailMonitoring phenological stages of cultivated crops by remote sensing in Mali.
Diallo, Mamadou Adama; Tychon, Bernard ULg

in Ninth conference on satellite meteorology and oceanography, 25-29 may 1998, Unesco, Paris, France (1998)

This study shows some potentialities of remote sensing (10 daily NDVI) to assess phenological stages of rainfed crops in Mali.

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See detailMonitoring Pichia anomala strain K and Candida oleophila strain O, antagonistic yeasts on apple surface
De Clercq, D.; Cognet, S.; Kubjak, C. et al

Poster (2001)

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See detailMonitoring Pichia anomala strain K and Candida oleophila strain O, antagonistic yeasts on apple surface
De Clercq, D.; Cognet, S.; Kubjak, C. et al

Conference (2001)

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See detailMonitoring population decline: can transect surveys detect the impact of the Ebola virus on apes?
Devos, Céline; Walsh, Peter; Arnhem, Eric et al

in Oryx (2008), 42(3), 367-374

In 2004 the Ebola virus caused a drastic decline in western gorilla Gorilla gorilla abundance at Lokoue´ Bai, a clearing in Odzala National Park, Republic of Congo. This decline was detected by ... [more ▼]

In 2004 the Ebola virus caused a drastic decline in western gorilla Gorilla gorilla abundance at Lokoue´ Bai, a clearing in Odzala National Park, Republic of Congo. This decline was detected by observations of gorillas visiting the clearing. We confirm that the sympatric chimpanzee Pan troglodytes population was also affected by the Ebola outbreak, and test whether the decline in the ape population would have been detected with linetransect surveys, the most commonly used wildlife monitoring methodology in Central Africa. We also evaluate the potential of transect surveys for describing the extent and pinpointing the timing of drastic population declines when this information is not known from other evidence. Both nest survey using the marked nest count method and standing stock survey of other signs of ape presence (dung, feeding remains, prints) were able to detect the decline. However, only nests and dung were reliable indices for estimating the magnitude of the decline and accurately pinpointing the timing. It was necessary to pool data across many survey replicates because of small samples sizes. Our results suggest that transects methods are able to detect drastic changes in ape abundance but that large sample sizes are necessary to achieve adequate statistical power. We therefore recommend that those intending to use transect methods as tools for monitoring large forest mammals evaluate in advance how much effort will be necessary to detect meaningful changes in animal abundance. [less ▲]

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See detailMonitoring sanitaire des ongulés sauvages
Linden, Annick ULg

Article for general public (2003)

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See detailMonitoring soil organic carbon in croplands using imaging spectroscopy (moca project)
Stevens, Antoine; van Wesemael, Bas; Tychon, Bernard ULg et al

Conference (2008, February 12)

The detection of changes in soil organic carbon (SOC) concentration is essential in both the assessment of SOC sequestration and soil quality. Within the EU soil thematic strategy the depletion of organic ... [more ▼]

The detection of changes in soil organic carbon (SOC) concentration is essential in both the assessment of SOC sequestration and soil quality. Within the EU soil thematic strategy the depletion of organic matter is mentioned as one of the major threats to the soil resource. As one of the first countries Luxemburg has taken the initiative to monitor the SOC concentration of individual fields to allow for eventual CO2 credits and as an indicator for good agro-ecological conditions (GAEC). The aim of this project is to develop an efficient and operational methodology to detect SOC changes in croplands using Imaging Spectroscopy and to map the SOC contents of croplands with high resolution and minimal calibration. [less ▲]

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See detailMonitoring System For The Biocontrol Agent Pichia Anomala Strain K Using Quantitative Competitive Pcr-Elosa
Pujol, M.; De Clercq, D.; Cognet, S. et al

in Plant Pathology (2004), 53(1), 103-109

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See detailMonitoring temperature changes during heat tracing experiments using electrical resistivity tomography
Hermans, Thomas ULg; Wildemeersch, Samuel ULg; Nguyen, Frédéric ULg

Conference (2013, December 06)

Thermal tracing experiments are becoming common in hydrogeology to estimate parameters governing heat transport processes and to study geothermal reservoirs. Electrical resistivity tomography (ERT) has ... [more ▼]

Thermal tracing experiments are becoming common in hydrogeology to estimate parameters governing heat transport processes and to study geothermal reservoirs. Electrical resistivity tomography (ERT) has proven its ability to monitor salt tracer tests, but few studies have investigated its performances, both qualitatively and quantitatively, in thermal tracing experiments. In this study, we monitored a heat injection and pumping experiment in an alluvial aquifer using both surface and crosshole ERT. The data sets of the surface profile, located along the main direction of flow, are distorted during injection by an electrical short-circuit through the external pumping-heating-injection experimental set-up. Current is flowing outside the subsurface leading to bad data for electrode dipoles located near the pumping and injection wells. The crosshole ERT panel is perpendicular to the main direction of flow. Difference inversion time-lapse images clearly show a preferential flow path in the bottom of the aquifer related to the presence of a coarse and clean gravel layer. Direct temperature measurements are available in control piezometers during the experiment to validate the ERT-derived temperatures and confirm the spatial pattern of temperature observed with ERT. Breakthrough curves are correctly retrieved in time and difference of 10 to 20% are observed for temperature estimation. The latter requires site-specific petrophysical laws and chemical stability assumptions that must be carefully verified. Our study proves that ERT, especially crosshole ERT, is a reliable tool to follow thermal tracing experiments but also to characterize heat transfer in the subsurface and to monitor geothermal resource exploitations. We also show that surface ERT may be impacted by the survey layout in unsuspected ways. [less ▲]

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See detailMonitoring the circadian rhythm of serum and salivary cortisol concentrations in the horse
Bohak, Zs; Szabo, F.; Beckers, Jean-François ULg et al

in Domestic Animal Endocrinology (2013), 45(1), 38-42

Daily fluctuations of cortisol concentration in the blood or saliva have been repeatedly reported. However, several contradictions in the existing literature appear on this subject. The present study was ... [more ▼]

Daily fluctuations of cortisol concentration in the blood or saliva have been repeatedly reported. However, several contradictions in the existing literature appear on this subject. The present study was performed to definitively establish options for testing adrenocortical function. To the best of our knowledge, this is the first study to evaluate parallel circadian rhythms in salivary and serum cortisol concentrations during a 24-h period. Twenty horses were examined under the same conditions. Blood and saliva samples were taken every 2 h for 24 h to determine the daily changes in cortisol concentrations of saliva and serum at rest and to determine the relationship between salivary and serum cortisol levels. Cosinor analysis of group mean data confirmed a significant circadian component for both serum and salivary cortisol concentrations (P < 0.001 in both cases). The serum cortisol circadian rhythm had an acrophase at 10:50 AM (95% CI, 10:00 AM-11:40 AM), a MESOR of 22.67 ng/mL, and an amplitude of 11.93 ng/mL. The salivary cortisol circadian rhythm had an acrophase at 10:00 AM (95% CI, 9:00 AM-11:00 AM), a MESOR of 0.52 ng/mL, and an amplitude of 0.12 ng/mL. We found a significant but weak association between salivary and serum cortisol concentrations; the Pearson correlation coefficient was 0.32 (P < 0.001). The use of salivary cortisol level as an indicator of hypothalamic-pituitary-adrenal axis activity may be warranted. However, the salivary cortisol levels are more likely to be correlated with free plasma cortisol than with the total plasma cortisol concentration. [less ▲]

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See detailMonitoring the dayside and nightside reconnection rates during various auroral event using IMAGE-FUV and SUPERDARN data
Hubert, Benoît ULg; Palmroth, M.; Milan, S. E. et al

in Syrjasuo, M.; Donovan, E. (Eds.) Substorms VIII (2006, March)

Detailed reference viewed: 8 (0 ULg)