Showing results 41 to 51 of 51
  Validation de méthodes analytiques: le profil d'exactitudeHeuskin, Stéphanie  Scientific conference (2009, October 28) Detailed reference viewed: 39 (2 ULg)Contribution to the study of semiochemical slow release formulations. Development of flash chromatographic methodsHeuskin, Stéphanie ; Farmakidis, Julien ; et alConference (2009, April 24) Detailed reference viewed: 12 (1 ULg)Contribution to the study of semiochemical slow release formulations. Development of flash chromatographic methods.Heuskin, Stéphanie ; ; et alPoster (2009) Detailed reference viewed: 17 (7 ULg)Fast Gas Chromatography Characterisation Of Purified Semiochemicals From Essential Oils Of Matricaria Chamomilla L. (Asteraceae) And Nepeta Cataria L. (Lamiaceae)Heuskin, Stéphanie ; ; Leroy, Pascal et alin Journal of Chromatography. A (2009), 1216(14), 2768-2775 Detailed reference viewed: 222 (84 ULg)Fast purification and characterisation of semiochemical compounds from essential oil of Matricaria chamomilla L. and Nepeta cataria L. using column chromatography fractionation and ultra fast GC analysisHeuskin, Stéphanie ; Leroy, Pascal ; et alPoster (2008, May 28) Detailed reference viewed: 9 (0 ULg)Fast purification and characterisation of semiochemical compounds from essential oils of Matricaria chamomilla L. and Nepeta cataria L. using column chromatography fractionation and Ultra Fast GC analysisHeuskin, Stéphanie ; Leroy, Pascal ; Capella, Quentin et alPoster (2008, May) Detailed reference viewed: 76 (9 ULg) Aphid honeydew is not only a sugary and amino-acid secretionLeroy, Pascal ; Heuskin, Stéphanie ; Sabri, Ahmed et alPoster (2008) Aphids, feeding from the phloem sap of plants, are the most common honeydew producing insects. This aphid excretory product consists in an aqueous mixture of different chemical compounds of which the most ... [more ▼] Aphids, feeding from the phloem sap of plants, are the most common honeydew producing insects. This aphid excretory product consists in an aqueous mixture of different chemical compounds of which the most important are sugars (90-95% of the dry weight) and amino acids. This excretory product, used by parasitoids and predators, plays a crucial role in the tritrophic interactions : (1) honeydew is an important food complement and (2) honeydew acts as a volatile and a contact kairomone. These characteristics could be exploited for enhancing the biological control in fields through the use of an « artificial honeydew ». [less ▲] Detailed reference viewed: 89 (31 ULg)Electrophysiological and behavioral responses of the multicolored asian lady beetle, Harmonia axyridis pallas, to sesquiterpene semiochemicalsVerheggen, François ; ; Heuskin, Stéphanie et alin Journal of Chemical Ecology (2007), 33(11), 2148-2155 The role of two volatile sesquiterpenes, (E)-beta-farnesene and (-)-beta-caryophyllene, in the chemical ecology of the multicolored Asian lady beetle, Harmonia axyridis Pallas, was investigated by using ... [more ▼] The role of two volatile sesquiterpenes, (E)-beta-farnesene and (-)-beta-caryophyllene, in the chemical ecology of the multicolored Asian lady beetle, Harmonia axyridis Pallas, was investigated by using both electrophysiological and behavioral techniques. (E)-beta-Farnesene is the major component of the alarm pheromone of most aphid species, which are preyed on by H. axyridis. (-)-beta-Caryophyllene was previously isolated from the headspace volatiles above overwintering and aggregated H. axyridis females. These sesquiterpenes elicited significant electroantennogram (EAG) activity from both H. axyridis male and female antennae. In a four-arm olfactometer, male and female H. axyridis were highly attracted toward (E)-beta-farnesene, whereas only males were attracted to (-)-beta-caryophyllene. In a bioassay technique that used a passively ventilated plastic box, both male and female H. axyridis aggregated in the (-)-beta-caryophyllene-treated side of the box. These results support the potential usefulness of (E)-beta-farnesene and (-)-beta-caryophyllene in push-pull strategies that use H. axyridis as a biological control agent in aphid-infested sites or to control this new urban pest in residential structures. [less ▲] Detailed reference viewed: 80 (39 ULg)Lutte biologique par l'utilisation de médiateurs chimiques : apports des techniques chromatographiquesHeuskin, Stéphanie ; Lognay, Georges Diverse speeche and writing (2007) Detailed reference viewed: 17 (3 ULg)Contribution à l'étude de métabolites volatils d'origines diverses (MVOCs et sémiochimiques) par analyse TDS-GCMSHeuskin, Stéphanie Master's dissertation (2004) Detailed reference viewed: 24 (9 ULg)Volatile releases of aphid infested plants and their infochemical role toward Episyrphus balteatus predatorFrancis, Frédéric ; Heuskin, Stéphanie ; Lognay, Georges et alPoster (2004) Detailed reference viewed: 15 (3 ULg) |
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