References of "Dubois, Lena"
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See detailVariable‐energy electron ionisation for GC×GC forensic blood VOC profiling
Dubois, Lena ULiege; Perrault, Katelynn ULiege; Stefanuto, Pierre-Hugues ULiege et al

Scientific conference (2017, December)

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See detailRecent Adavances in the Analytical Chemistry of Cadaveric Decomposition
Focant, Jean-François ULiege; Dubois, Lena ULiege; Perrault, Katelynn ULiege et al

in Journal of Integrated Omics (2017, November)

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See detailTD-GCxGC-HRTOFMS in biological applications 
Focant, Jean-François ULiege; Pesesse, Romain ULiege; Dubois, Lena ULiege et al

Conference (2017, September)

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See detailAdvanced method optimization for volatile aroma profiling of beer using two-dimensional gas chromatography time-of-flight mass spectrometry
Stefanuto, Pierre-Hugues ULiege; Perrault, Katelynn ULiege; Dubois, Lena ULiege et al

in Journal of Chromatography. A (2017)

The complex mixture of volatile organic compounds (VOCs) present in the headspace of Trappist and craft beers was studied to illustrate the efficiency of thermal desorption (TD) comprehensive two ... [more ▼]

The complex mixture of volatile organic compounds (VOCs) present in the headspace of Trappist and craft beers was studied to illustrate the efficiency of thermal desorption (TD) comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry (GC × GC-TOFMS) for highlighting subtle differences between highly complex mixtures of VOCs. Headspace solid-phase microextraction (HS-SPME), multiple (and classical) stir bar sorptive extraction (mSBSE), static headspace (SHS), and dynamic headspace (DHS) were compared for the extraction of a set of 21 representative flavor compounds of beer aroma. A Box-Behnken surface response methodology experimental design optimization (DOE) was used for convex hull calculation (Delaunay’s triangulation algorithms) of peak dispersion in the chromatographic space. The predicted value of 0.5 for the ratio between the convex hull and the available space was 10% higher than the experimental value, demonstrating the usefulness of the approach to improve optimization of the GC × GC separation. Chemical variations amongst aligned chromatograms were studied by means of Fisher Ratio (FR) determination and F‐distribution threshold filtration at different significance levels (α = 0.05 and 0.01) and based on z‐score normalized area for data reduction. Statistically significant compounds were highlighted following principal component analysis (PCA) and hierarchical cluster analysis (HCA). The dendrogram structure not only provided clear visual information about similarities between products but also permitted direct identification of the chemicals and their relative weight in clustering. The effective coupling of DHS-TD-GC × GC-TOFMS with PCA and HCA was able to highlight the differences and common typical VOC patterns among 24 samples of different Trappist and selected Canadian craft beers. [less ▲]

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See detailA Minimally-Invasive Internal Gas Reservoir Monitoring Method for Postmortem Examinations
Perrault, Katelynn ULiege; Stefanuto, Pierre-Hugues ULiege; Dubois, Lena ULiege et al

in Forensic Science International (2017), 277

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See detailEnhanced Chemical Profiling of Human Decomposition in a Case Study
Dubois, Lena ULiege; Perrault, Katelynn ULiege; Stefanuto, Pierre-Hugues ULiege et al

in Forensic Science International (2017), 277

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See detailMonitoring Changes in the Volatile Profile of Aging Human Blood
Dubois, Lena ULiege; Perrault, Katelynn ULiege; Stefanuto, Pierre-Hugues ULiege et al

in Forensic Science International (2017), 277

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See detailThe Odor of Death: An Overview of Current Knowledge on Characterization and Applications
Verheggen, François ULiege; Perrault, Katelynn ULiege; Caparros Megido, Rudy ULiege et al

in Bioscience (2017)

After death, the human body undergoes various processes that result in the emission of volatile organic compounds (VOCs). The interest in these VOCs has increased substantially in recent years because ... [more ▼]

After death, the human body undergoes various processes that result in the emission of volatile organic compounds (VOCs). The interest in these VOCs has increased substantially in recent years because they are key attractants for necrophagous insects and vertebrate scavengers. Identifying cadaveric VOCs has required the effective development of analytical tools for collecting, separating, identifying, and quantifying the suite of VOCs released throughout decomposition. Analytical developments for studying cadaveric VOCs in vertebrates, ecological interactions of cadaveric VOCs with the abiotic and biotic environment, and the necessity for convergence of these two areas for the progression of future knowledge are discussed herein. [less ▲]

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