References of "Gason, Fabrice"
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See detailOn the frequency of occurrence of a peculiar polyester fibre type found in blue denim textiles
De Wael, Kris; Baes, Christiaan; Lepot, Laurent ULg et al

in Science & Justice (2011), 51(4), 154-162

In a double murder investigation, the victims were found after a prolonged stay in a drainage canal. In spite of the expectations, fibre examination established a multitude of primary and secondary ... [more ▼]

In a double murder investigation, the victims were found after a prolonged stay in a drainage canal. In spite of the expectations, fibre examination established a multitude of primary and secondary transferred fibres. One of these fibre types was a colourless polyester fibre possessing a blue coloured molten fibre end. These matched one of the types present in the suspect's blue denim trousers. The aim of this study was to verify the rarity of this peculiar fibre type and more precisely its presence in blue denim textiles. Over five hundred different blue jeans textiles were examined and only one of these presented exactly the same type. The comparison involved microscopy, microspectrophotometry in the visible range and Raman spectroscopy. The results indicate this fibre type is extremely rare in a blue jeans fabrics and that "standard" blue denim should not be disregarded in case work. [less ▲]

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See detailIn search of blood – detection of minute particles using spectroscopic methods
Lepot, Laurent ULg; Gilbert, Bernard ULg; De Wael, Kris et al

in Forensic Science International (2008), 180(1), 37-42

An examination protocol for rapid detection of remnants of blood particles on garments of suspects in bloody murder cases is described. Micro particles of blood are sampled along with fibres and hairs ... [more ▼]

An examination protocol for rapid detection of remnants of blood particles on garments of suspects in bloody murder cases is described. Micro particles of blood are sampled along with fibres and hairs using the tape lifting method. The tapings are searched with a low power microscope for red particles with morphology similar to blood. Presumed blood traces are further examined using microspectrophotometry on the cut out piece of taping. The typical visible spectrum of haemoglobin is characteristic for blood. Alternatively Raman spectroscopy can be used to measure the characteristic vibrational spectrum of haemoglobin. At a later stage, these particles may be removed from the piece of taping in order to extract the blood and attempt to obtain a genetic profile. [less ▲]

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See detailApplication of Raman spectroscopy to forensic fibre cases
Lepot, Laurent ULg; Gilbert, Bernard ULg; De Wael, Kris et al

in Science & Justice : Journal of the Forensic Science Society (2008), 48(3), 109-117

Five forensic fibre cases in which Raman spectroscopy proved to be a good confirmatory method for microspectrophotometry (MSP) are described. Absorption spectra in the visible range are indeed sometimes ... [more ▼]

Five forensic fibre cases in which Raman spectroscopy proved to be a good confirmatory method for microspectrophotometry (MSP) are described. Absorption spectra in the visible range are indeed sometimes characteristic of a certain dye but this one can be subsequently identified unambiguously by Raman spectroscopy using a spectral library. In other cases the comparison of Raman spectra of reference fibres and suspect fibres led to an improvement of the discrimination power. The Raman measurements have been performed directly on mounted fibres and the spectra showed only little interference from the mounting resin and glass. Raman spectroscopy is therefore a powerful method that can be applied in routine fibre analysis following optical microscopy and MSP measurements. [less ▲]

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