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1Microwave Synthesis of Large Few-Layer Graphene Sheets in Aqueous Solution of Ammonia显示文摘Few-layer graphene (FLG) sheets with sizes exceeding several micrometers have been synthesized by exfoliation of expanded graphite in aqueous solution of ammonia under microwave irradiation, with an overall yield approaching 8 wt.%. Transmission electron microscopy (in bright-field and dark-field modes) together with electron diffraction patterns and atomic force microscopy confirmed that this graphene material consisted mostly of mono-, bi- or few-layer graphene (less than ten layers). The high degree of surface reduction was confirmed by X-ray photoelectron and infrared spectroscopies. In addition, the high stability of the FLG in the liquid medium facilitates the deposition of the graphene material onto several substrates via low-cost solution-phase processing techniques, opening the way to subsequent applications of the material.Izabela Janowska Kambiz Chizari Ovidiu Ersen Spyridon Zafeiratos Driss Soubane Victor Da Costa Virginie Speisser Christine Boeglin Matthieu Houllé Dominique Bégin Dominique Plee Marc-Jacques Ledoux Cuong Pham-Huu 2010Nano Research2010,3,2:22
2Characterisation and seasonal variations of particles in the atmosphere of rural, urban and industrial areas:Organic compounds显示文摘Atmospheric aerosol samples(PM_(2.5–0.3), i.e., atmospheric particles ranging from 0.3 to2.5 μm) were collected during two periods: spring–summer 2008 and autumn–winter 2008–2009, using high volume samplers equipped with cascade impactors. Two sites located in the Northern France were compared in this study: a highly industrialised city(Dunkirk) and a rural site(Rubrouck). Physicochemical analysis of particulate matter(PM) was undertaken to propose parameters that could be used to distinguish the various sources and to exhibit seasonal variations but also to provide knowledge of chemical element composition for the interpretation of future toxicological studies. The study showed that PM2.5–0.3concentration in the atmosphere of the rural area remains stable along the year and was significantly lower than in the urban or industrial ones, for which concentrations increase during winter.High concentrations of polycyclic aromatic hydrocarbons(PAHs), dioxins, furans and dioxin like polychlorinated biphenyls(DL-PCBs), generated by industrial activities, traffic and municipal wastes incineration were detected in the samples. Specific criteria like Carbon Preference Index(CPI) and Combustion PAHs/Total PAHs ratio(CPAHs/TPAHs) were used to identify the possible sources of atmospheric pollution. They revealed that paraffins are mainly emitted by biogenic sources in spring–summer whereas as in the case of PAHs, they have numerous anthropogenic emission sources in autumn-winter(mainly from traffic and domestic heating).Fabrice Cazier Paul Genevray Dorothée Dewaele Habiba Nouali Anthony Verdin Frédéric Ledoux Adam Hachimi Lucie Courcot Sylvain Billet Saad Bouhsina Pirouz Shirali Guillaume Garcon Dominique Courcot 2016Journal of Environmental Sciences2016,28,6:4
3A new approach to measure melamine, cyanuric acid, and melamine cyanurate using surface enhanced Raman spectroscopy coupled with gold nanosubstrates显示文摘Lili He Yang Liu Mengshi Lin Joseph Awika David R. Ledoux Hao Li Azlin Mustapha 2008Sensing and Instrumentation for Food Quality and Safety2008,,1:3
4PM_(2.5) source apportionment in a French urban coastal site under steelworks emission influences using constrained non-negative matrix factorization receptor model显示文摘The constrained weighted-non-negative matrix factorization(CW-NMF) hybrid receptor model was applied to study the influence of steelmaking activities on PM_(2.5)(particulate matter with equivalent aerodynamic diameter less than 2.5 μm) composition in Dunkerque,Northern France. Semi-diurnal PM_(2.5)samples were collected using a high volume sampler in winter 2010 and spring 2011 and were analyzed for trace metals, water-soluble ions, and total carbon using inductively coupled plasma – atomic emission spectrometry(ICP-AES),ICP- mass spectrometry(ICP-MS), ionic chromatography and micro elemental carbon analyzer. The elemental composition shows that NO_3^-, SO_4^(2-), NH_4^+and total carbon are the main PM_(2.5)constituents. Trace metals data were interpreted using concentration roses and both influences of integrated steelworks and electric steel plant were evidenced. The distinction between the two sources is made possible by the use Zn/Fe and Zn/Mn diagnostic ratios. Moreover Rb/Cr, Pb/Cr and Cu/Cd combination ratio are proposed to distinguish the ISW-sintering stack from the ISW-fugitive emissions. The a priori knowledge on the influencing source was introduced in the CW-NMF to guide the calculation. Eleven source profiles with various contributions were identified: 8 are characteristics of coastal urban background site profiles and 3 are related to the steelmaking activities. Between them,secondary nitrates, secondary sulfates and combustion profiles give the highest contributions and account for 93% of the PM_(2.5)concentration. The steelwork facilities contribute in about 2%of the total PM_(2.5)concentration and appear to be the main source of Cr, Cu, Fe, Mn, Zn.Adib Kfoury Frederic Ledoux Cloe Roche Gilles Delmaire Gilles Roussel Dominique Courcot 2016Journal of Environmental Sciences2016,28,2:3
5Influence of ship emissions on NOx, SO2, O3 and PM concentrations in a North-Sea harbor in France显示文摘The influence of in-port ship emissions on gases and PM_(10) concentrations has been estimated in the port city of Calais, northern France, one of the busiest harbor in Europe,with numerous rotations of ferries or roll-on/roll-off cargo in average per day. NO_x, SO_2, O_3 and PM_(10) concentrations were continuously measured over a three-month period, as well as real-time particle size distribution. A rural site located at Cape Gris-Nez, 20km from Calais, was considered to deduce intrinsic contribution of ship emissions at the harbor city.The average concentrations of the studied species as well as the pattern of the conditional bivariate probability function at the two sites evidenced that in-port shipping, especially during the maneuvering operations, has an important influence on the NO_xand SO_2 concentrations. The impact of shipping in the harbor of Calais on average concentrations was estimated to 51% for SO_2, 35% for NO, 15% for NO_2 and 2% for PM_(10) in the studied period.Concentration peaks of SO_2 and NO_x associated with an O_3 depletion appeared synchronized with departures and arrivals of ferries. For winds blowing from the harbor,when compared to the background level, the number of particles appeared 10 times higher,with the highest differences in the 30–67nm and the 109–167 nm size ranges. The average impact of in-port ships on PM310 concentrations was estimated to + 28.9 μg/mand concerned mainly the PM1 size fraction(40%). Punctually, PM_(10) can potentially reach a concentration value close to 100 μg/m^3.Frederic Ledoux Cloe Rochet Fabrice Cazier Charles Beaugard Dominique Courcot 2018Journal of Environmental Sciences2018,30,9:2
6Emotion circuits in the brain显示文摘LeDoux JE 2000Annu Rev Neurosci2000,23,:2
7Valuing ocean and coastal resources:a review of practical examples and issues for further action显示文摘LEDOUX L TURNER R K 2002Ocean & Coastal Management2002,45,:1
8Elegants cell death gene ced3 encodes a protein similara to mammalian interleukin-1 betaconverting enzyme显示文摘Yuan J Shaham S Ledoux S 1993Cell1993,75,:1
9Calcium- activated potassium channels and the regulation of vascular tone显示文摘Ledoux J Werner ME Brayden JE 2006Physiology2006,21,1:1
10Acquisition of fear extinction requiresactivation of NR2B-containlng NMDA receptors in the lateralamygdala 显示文摘Sotres-Bayon F Bush DE LeDoux JE 2007Neurepsychopharmacology2007,32,9:1
11Lang-term evolution of nutritional deficiencies after gastric bypass: an assessment according to compliance to medical care 显示文摘Ledoux S Calabrese D Bogard C 2014Annals of surgery2014,259,6:1
12Parasympathcticinn ervation of the meibomiang landsin rats显示文摘Ledoux MS Zhou Q Murphy RB 2001Invest ophthalmolVisSci2001,42,11:1
13River bank filtration: modeling of the changes in water chemistry with emphasis on nitrogen species显示文摘Doussan C Poitevin G Ledoux E el al 1997Jounud of Contain Hydrology1997,25,:1
14Modeling fracture flow with a stochastic discrete fracture network:calibration and validation 1,flow model显示文摘Cacas M C Ledoux E de Marsily G 1990Water Resources Research1990,26,3:1
15Recent developments in calcium-related obesity research显示文摘Major GC Chaput JP Ledoux M 2008Obes Rev2008,9,5:1
16Brain-derived neurotrophic factor:a dynamic gatekeeper of neural plasticity显示文摘Cowansage K K LeDoux J E Monfils M H 0,,01:1
17Repeated restraint stress facilitates fear conditioning independently of causing hippocampal CA3 dendritic atrophy显示文摘ConradCD LeDoux JE Magarinos AM 1999Behav Neurosci1999,113,5:1
18A new dimethy ester bisphosphonate inhibits angiogenesis and growth of human epidermoid carcinoma xenograft in nude mice 显示文摘Ledoux D Hamma-Kourbali Y Di Benedetto M 2006Anticancer Drugs2006,17,4:1
19On the role of hydrogen during the reduction-earburation of MoO3 into molybdenum oxycarbide 显示文摘Bouchy C Cuong P H Ledoux M J 2000Journal of Molecular Catalysis A: Chemical2000,162,12:1
20Topologically Consistent 3D City Models Obtained by Extrusion显示文摘LEDOUX H MEIJERS M 2011International Journal of Geographical Information Science2011,25,4:1
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