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See detailErratum: Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry (Astronomy and Astrophysics (2013) 555 (A36))
Kains, N.; Bramich, D. M.; Arellano Ferro, A. et al

in Astronomy and Astrophysics (2016), 588

[No abstract available]

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See detailles besoins des personnes en situation de handicap de grande dépendance
Voz, Bernard ULiege; Wiliquet, Muriel ULiege; Balteau, Marie

Report (2015)

Dans la foulée d'une enquête à vocation statistique, l’Observatoire a souhaité faire réaliser une recherche dans une optique plus compréhensive, via laquelle la nature du vécu des individus, dans toute sa ... [more ▼]

Dans la foulée d'une enquête à vocation statistique, l’Observatoire a souhaité faire réaliser une recherche dans une optique plus compréhensive, via laquelle la nature du vécu des individus, dans toute sa diversité, pourrait être exprimée et entendue. Cette fois, il s’agissait de recueillir des témoignages approfondis, dont l’analyse viendrait étayer les constats de l'étude statistique. L'objectif général demeurait l’amélioration de la connaissance des besoins des Bruxellois en situation de grande dépendance, en vue de pouvoir y répondre au mieux. [less ▲]

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See detailSchede
Miesse, Hélène ULiege

in Bibliografia generale della lingua e della letteratura italiana (2015), XXI-XXII

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See detailFast methodology for the reliable determination of nonylphenol in water samples by minimal labeling isotope dilution mass spectrometry.
Fabregat Cabello, Neus ULiege; Castillo, Angel; Sancho, Juan V. et al

in Journal of Chromatography. A (2013), 1301

In this work we have developed and validated an accurate and fast methodology for the determination of 4-nonylphenol (technical mixture) in complex matrix water samples by UHPLC-ESI-MS/MS. The procedure ... [more ▼]

In this work we have developed and validated an accurate and fast methodology for the determination of 4-nonylphenol (technical mixture) in complex matrix water samples by UHPLC-ESI-MS/MS. The procedure is based on isotope dilution mass spectrometry (IDMS) in combination with isotope pattern deconvolution (IPD), which provides the concentration of the analyte directly from the spiked sample without requiring any methodological calibration graph. To avoid any possible isotopic effect during the analytical procedure the in-house synthesized (13)C1-4-(3,6-dimethyl-3-heptyl)phenol was used as labeled compound. This proposed surrogate was able to compensate the matrix effect even from wastewater samples. A SPE pre-concentration step together with exhaustive efforts to avoid contamination were included to reach the signal-to-noise ratio necessary to detect the endogenous concentrations present in environmental samples. Calculations were performed acquiring only three transitions, achieving limits of detection lower than 100ng/g for all water matrix assayed. Recoveries within 83-108% and coefficients of variation ranging from 1.5% to 9% were obtained. On the contrary a considerable overestimation was obtained with the most usual classical calibration procedure using 4-n-nonylphenol as internal standard, demonstrating the suitability of the minimal labeling approach. [less ▲]

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See detailFast and accurate procedure for the determination of Cr(VI) in solid samples by isotope dilution mass spectrometry.
Fabregat Cabello, Neus ULiege; Rodriguez-Gonzalez, Pablo; Castillo, Angel et al

in Environmental Science & Technology (2012), 46(22), 12542-9

We present here a new environmental measurement method for the rapid extraction and accurate quantification of Cr(VI) in solid samples. The quantitative extraction of Cr(VI) is achieved in 10 minutes by ... [more ▼]

We present here a new environmental measurement method for the rapid extraction and accurate quantification of Cr(VI) in solid samples. The quantitative extraction of Cr(VI) is achieved in 10 minutes by means of focused microwave assisted extraction using 50 mmol/L Ethylendiamintetraacetic acid (EDTA) at pH 10 as extractant. In addition, it enables the separation of Cr species by anion exchange chromatography using a mobile phase which is a 1:10 dilution of the extracting solution. Thus, neutralization or acidification steps which are prone to cause interconversion of Cr species are not needed. Another benefit of using EDTA is that it allows to measure Cr(III)-EDTA complex and Cr(VI) simultaneously in an alkaline extraction solution. The application of a 10 minutes focused microwave assisted extraction (5 min at 90 degrees C plus 5 min at 110 degrees C) has been shown to quantitatively extract all forms of hexavalent chromium from the standard reference materials (SRM) candidate NIST 2700 and NIST 2701. A double spike isotope dilution mass spectrometry (IDMS) procedure was employed to study chromium interconversion reactions. It was observed that the formation of a Cr(III)-EDTA complex avoided Cr(III) oxidation for these two reference materials. Thus, the use of a double spiking strategy for quantification is not required and a single spike IDMS procedure using isotopically enriched Cr(VI) provided accurate results. [less ▲]

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See detailTables of gravitational lenses
Surdej, Jean ULiege

in Kayser, R.; Schramm, T.; Nieser, L. (Eds.) Gravitational Lenses (1992)

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