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See detailDetermination of thiamine and its phosphate esters by reversed-phase HPLC at femtomole levels. Application to bioelectrogenesis.
Bettendorff, Lucien ULg; Schoffeniels, Ernest; Schmartz, Denis et al

in Changeux, Jean-Pierre; Maelicke, A.; Neumann, E. (Eds.) Molecular Basis of Nerve Activity (1985)

Detailed reference viewed: 16 (7 ULg)
Peer Reviewed
See detailDetermination of thiamine and its phosphate esters in human blood serum at femtomole levels
Bettendorff, Lucien ULg; Grandfils, Christian ULg; De Rycker, Cécile et al

in Journal of Chromatography. B : Analytical Technologies in the Biomedical & Life Sciences (1986), 382

Detailed reference viewed: 38 (3 ULg)
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See detailDetermination of thiamine and thiamine phosphates as thiochrome derivatives by reversed phase chromatography on polystyrene packing materials
Bontemps, José; Bettendorff, Lucien ULg; Lombet, Jacques et al

in Chromatographia (1984), 18

Detailed reference viewed: 33 (5 ULg)
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See detailDetermination of thiamine and thiamine phosphates in excitable tissues as thiochrome derivatives by reversed phase high-performance liquid chromatography on octadecyl-silica.
Bontemps, José; Philippe, P.; Bettendorff, Lucien ULg et al

in Journal of Chromatography. B : Biomedical Applications (1984), 307

Detailed reference viewed: 43 (6 ULg)
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See detailDetermination of tissue-specific CK-MB2 in serum after myocardial damage
Hing, M.; Chapelle, Jean-Paul ULg

in European Journal of Clinical Chemistry and Clinical Biochemistry : Journal of the Forum of European Clinical Chemistry Societies (1993), 31

Detailed reference viewed: 8 (0 ULg)
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See detailDetermination of total arsenic in foods by HGAAS
Kabengera, Ch.; Bodart, P.; Hubert, Philippe ULg et al

Conference (2000)

Detailed reference viewed: 19 (0 ULg)
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See detailDetermination of total glucosinolate in rapeseed (colza). Activities of BCR-programme Community Bureau of Reference .
Wathelet, Jean-Paul ULg; Severin, M.; Wagstaffe, P. J.

in GCIRC Bulletin (1990)

Detailed reference viewed: 25 (2 ULg)
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See detailDetermination of total homocysteine in plasma by automated fluorescence polarization immunoassay
Chapelle, Jean-Paul ULg; Gielen, Jacques; Legrand, Victor ULg et al

in Clinical Chemistry & Laboratory Medicine (1999), 37(suppl), 373

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See detailDetermination of total phenolic compounds content and antioxidant activity in cherry species and cultivars
Pissard, Audrey; Lateur, Marc; Baeten, V et al

in Journal of Berry Research (2016)

BACKGROUND: Several studies have shown that cherries, especially sour cultivars, contain substantial amounts of phenolic compounds. OBJECTIVE: This study aims to (i) analyze the total phenolic compound ... [more ▼]

BACKGROUND: Several studies have shown that cherries, especially sour cultivars, contain substantial amounts of phenolic compounds. OBJECTIVE: This study aims to (i) analyze the total phenolic compound (TPC) content and the antioxidant capacity (AC) of a large range of cultivars using the same methodology in one laboratory, and (ii) determine the possible relationship between agronomic characteristics and AC. METHODS: A total of 245 samples including sweet, sour and hybrid cultivars from our collections were harvested at their optimum maturity and characterized according to their TPC, DPPH and ORAC values. RESULTS: The TPC content and DPPH and ORAC values varied greatly among the cherries, with the sour cultivars presenting higher levels than the sweet ones. The PCA plot showed a slight grouping by species and confirmed the high TPC content level in sour cultivars. The bi-colored cultivars had lower TPC and antioxidant capacity (AC) values than dark-colored ones, indicating that coloration could give an indication of the AC of fruits. No significant relationship between the agronomic and chemical properties was highlighted. CONCLUSIONS: Cherry fruits, especially from sour cultivars, represent an important source of bioactive compounds and could attract new interest as a ‘functional food’. [less ▲]

Detailed reference viewed: 54 (26 ULg)
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See detailDetermination of total phenolic compounds content and antioxidant activity in cherry species and cultivars
Pissard, Audrey; Lateur, Marc; Baeten, V et al

in Journal of Berry Research (2016)

BACKGROUND: Several studies have shown that cherries, especially sour cultivars, contain substantial amounts of phenolic compounds. OBJECTIVE: This study aims to (i) analyze the total phenolic compound ... [more ▼]

BACKGROUND: Several studies have shown that cherries, especially sour cultivars, contain substantial amounts of phenolic compounds. OBJECTIVE: This study aims to (i) analyze the total phenolic compound (TPC) content and the antioxidant capacity (AC) of a large range of cultivars using the same methodology in one laboratory, and (ii) determine the possible relationship between agronomic characteristics and AC. METHODS: A total of 245 samples including sweet, sour and hybrid cultivars from our collections were harvested at their optimum maturity and characterized according to their TPC, DPPH and ORAC values. RESULTS: The TPC content and DPPH and ORAC values varied greatly among the cherries, with the sour cultivars presenting higher levels than the sweet ones. The PCA plot showed a slight grouping by species and confirmed the high TPC content level in sour cultivars. The bi-colored cultivars had lower TPC and antioxidant capacity (AC) values than dark-colored ones, indicating that coloration could give an indication of the AC of fruits. No significant relationship between the agronomic and chemical properties was highlighted. CONCLUSIONS: Cherry fruits, especially from sour cultivars, represent an important source of bioactive compounds and could attract new interest as a ‘functional food’. [less ▲]

Detailed reference viewed: 54 (26 ULg)
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See detailDetermination of total water content in inulin using the volumetric Karl Fischer titration
Ronkart, S. N.; Paquot, Michel ULg; Fougnies, C. et al

in Talanta (2006), 70(5), 1006-1010

A new sample preparation method for the water content determination of mulin by volumetric Karl Fischer (KF) titration was developed and compared to the usual method of introducing the sample directly in ... [more ▼]

A new sample preparation method for the water content determination of mulin by volumetric Karl Fischer (KF) titration was developed and compared to the usual method of introducing the sample directly in the methanol-based working medium, modified or not by formamide (1:3, v/v) in order to increase sample solubility. In the proposed method, inulins were externally prepared by dissolving them in pure formamide (2.5:7.5, w/w). The time of analysis of the liquid/liquid reaction of the new method between the dissolved sample and the reaction medium is about 1-2 min, while the usual KF method is stopped after the 10 min delay time. The developed method permits the determination of water included in the crystals of the sample, confirmed by analysing both crystalline and amorphous mulin samples. Another advantage of this new method is its applicability for the water content determination of other polysaccharides that are not readily soluble in the working medium. Moreover. water content determination can be done by any type of volumetric KF titrator, as this proposed technique is not dependent on any additional tools such as a built-in homogeniser or a heatable titration beaker. (c) 2006 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 24 (3 ULg)
See detailDETERMINATION OF TRIFLURALIN RESIDUES IN CULTURED CATFISH AND WATER.
Nguyen Quoc, Thinh; Tran Minh, Phu; Do Thi Thanh, Huong et al

Poster (2011)

Detailed reference viewed: 83 (6 ULg)
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See detailDetermination of trophic status of seabirds using carbon and nitrogen isotopes.
Nyssen, Fabienne; Lepoint, Gilles ULg; Dauby, Patrick ULg et al

Poster (2000, May)

Detailed reference viewed: 6 (1 ULg)
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See detailDetermination of uncertainty in a liquid chromatographic method for erythromycin from Interlaboratory study results
Dehouck, Pieter; Vander Heyden, Yvan; Smeyers-Verbecke, Johanna et al

Conference (2003, May)

Detailed reference viewed: 24 (4 ULg)
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See detailDetermination of uncertainty in analytical measurements from collaborative study results on the analysis of a phenoxymethylpenicillin sample
Dehouck, Pieter; Vander Heyden, Yvan; Smeyers-Verbeke, Johanna et al

in Analytica Chimica Acta (2003), 481

The correct interpretation of a measurement result requires knowledge about its uncertainty. Depending on the conditions under which the analyst is operating, different operational definitions of ... [more ▼]

The correct interpretation of a measurement result requires knowledge about its uncertainty. Depending on the conditions under which the analyst is operating, different operational definitions of uncertainty have been proposed. They include: within-laboratory uncertainty, reproducibility uncertainty, bias-included uncertainty and absolute uncertainty. Here we consider the evaluation of the reproducibility uncertainty derived from the results obtained in an inter-laboratory experiment. Nine laboratories participated in an inter-laboratory study for the analysis of phenoxymethylpenicillin. The analyses consisted of a Karl–Fischer water determination, an acid–base titration to assay phenoxymethylpenicillin and a liquid chromatography (LC) method to determine 4-hydroxyphenoxymethylpenicillin and other impurities. The experimental set-up allowed to obtain for each determination s2 r and s2L as estimates of the repeatability variance (σ2r ) and the between-laboratory variance (σ2L), respectively. The reproducibility uncertainties for the different assays were then derived from these estimates. [less ▲]

Detailed reference viewed: 51 (3 ULg)