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Microwave Synthesis of Large Few-Layer Graphene Sheets in Aqueous Solution of Ammonia

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Nano Research 2010年第2期3卷 126-137页

作者： 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 Laboratoire des Matériaux Surfaces et Procédés pour la Catalyse(LMSPC)UMR7515 CNRS-Universitéde Strasbourg 25rue Becquerel67087 Strasbourg Cedex 08France Institut de Physique et Chimie des Matériaux de Strasbourg(IPCMS) UMR7504 CNRS-Universitéde Strasbourg 23rue du Loess67037 Strasbourg Cedex 02France Arkema Groupement de Recherche de Lacq(GRL)BP 3464170 LACQFrance

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.

关键词： Graphene transmission electron microscopy(TEM) expanded graphite exfoliation microwaves

Direct hydrogen quantification in high-pressure metal hydrides

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Matter and Radiation at Extremes 2023年第1期8卷 63-69页

作者： Thomas Meier dominique Laniel Florian Trybel Center for High Pressure Science and Technology Advance Research BeijingChina Center for Science at Extreme Conditions University of EdinburghEdinburghUnited Kingdom Department of Physics Chemistry and Biology(IFM)Linkoping UniversityLinkopingSweden

compounds showing phonon mediated near room-temperature ***,severe limitations in determining the chemical formula of the reaction products,especially with regards to their hydrogen content,impedes a deep understanding of the synthesized phases and can lead to significantly erroneous ***,we present a way to directly access the hydrogen content of MH solids synthesized at high pressures in(laser-heated)diamond anvil cells using nuclear magnetic resonance *** show that this method can be used to investigate MH compounds with a wide range of hydrogen content,from MH_(x) with x=0.15(CuH_(0.15))to x■6.4(H_(6±0.4)S_(5)).

关键词： spectroscopy hydrogen content

Is chronic hepatitis C virus infection a risk factor for breast cancer?

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World Journal of Gastroenterology 2010年第29期16卷 3687-3691页

作者： dominique Larrey Marie-Cécile Bozonnat Ihab Kain Georges-Philippe Pageaux Eric Assenat Liver Unit and INSERM Unit 632 Saint-Eloi HospitalMontpellier University Department of Biostatistics Intitut Universitaire de Recherche CliniqueMontpellier University Liver Unit Saint-Eloi HospitalMontpellier University Medical Oncology Unit Saint-Eloi HospitalMontpellier University

AIM:To evaluate the prevalence of breast tumors in adult females with chronic hepatitis C virus(HCV) ***:Prospective,single-center study,based on female outpatients consulting in a liver unit,for 1 *** study group included females with present and/or past history of chronic infection by *** with spontaneous recovery were *** hepatitis had been proved by liver biopsy in the majority of cases and/or biological markers of inflammation and *** control group included female patients with other well documented chronic liver diseases:chronic hepatitis B,alcoholic liver disease,autoimmune hepatitis,hemochromatosis,non alcoholic liver disease,chronic *** patients were prospectively questioned during consultation about past breast history and follow-up by ***:Breast carcinoma was recorded in 17/294 patients with HCV infection(5.8%,95% CI:3.1-8.4) vs 5/107 control patients(4.7%,95% CI:0.67-8.67).Benign tumors of the breast(mastosis,nodules,cysts) were recorded in 75/294 patients with HCV infection(25.5%,95% CI:20.5-30.5) vs 21/107(19.6%,95% CI:12.1-27.1) in the control *** lesion was noted in 202 patients with HCV(68.7%,95% CI:63.4-74) vs 81 control patients(75.7%,95% CI:67.6-83.8).Despite a trend to an increased prevalence in the group with HCV infection,the difference was not significant compared to the control group(P=NS).In patients over 40 years,the results were,respectively,as follows:breast cancer associated with HCV:17/266 patients(6.3%,95% CI:3.4-9.3) vs 5/95 patients(5.2%,95% CI:0.7-9.7) in the control group;benign breast tumors:72/266 patients with HCV infection(27%,95% CI:21.7-32.4) vs 18/95 patients(18.9%,95% CI:11-26.8) in the control group;no breast lesion 177/266(66.5%,95% CI:60.9-72.2) in patients with HCV infection vs 72/95(75.7%,95% CI:67.1-84.4) in the control *** differences were not significant(P=NS).CONCLUSION:These results suggest that chronic HCV infectio

关键词： Breast tumors Breast cancer Hepatitis C virus infection Risk factor

Pediatric and congenital heart disease during the COVID-19 pandemic: the triple threat

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World Journal of Pediatric Surgery 2021年第2期4卷 45-47页

作者： Salem T Argaw Maryam S Babar dominique Vervoort Feinberg School of Medicine Northwestern UniversityChicagoIllinoisUSA 2 Dubai Medical College DubaiUAE Department of Health Policy and Management Johns Hopkins University Bloomberg School of Public HealthBaltimoreMarylandUSA

The COVID-19 pandemic has left an unprec-edented mark on the *** of April 2021,over 100 million people have been confirmed with COVID-19,leading to nearly 3 million deaths-and counting.1 Children have been found to pr... 详细信息

关键词： congenital death pediatric

地方身份的重要性及其对于遗产保护的支撑作用:以比利时根特城市核心区工业化前的邻里关系为例(英文)

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资源科学 2009年第6期31卷 926-933页

作者： dominique Vanneste Catholic University of Leuven (K.U.Leuven)

遗产包括代际之间物质和非物质的交流,各个群体和团体随着其所处环境、与自然界的相互关系和历史条件的变化不断使这种代代相传的物质的和非物质的遗产得到保护和创新,同时使他们自己具有一种认同感和历史感,从而促进了文化多样性,激发... 详细信息

遗产包括代际之间物质和非物质的交流,各个群体和团体随着其所处环境、与自然界的相互关系和历史条件的变化不断使这种代代相传的物质的和非物质的遗产得到保护和创新,同时使他们自己具有一种认同感和历史感,从而促进了文化多样性,激发人类的创造力。但是目前这种交流的客观事实或性质以及历史维度在遗产保护中并没有给予足够的重视。本文针对遗产在当地社区身份中的重要性,以及地方身份是否在当地居民中产生了对遗产保护的积极性等问题进行了探讨,调查了遗产及其保护是否以及如何成为社区复兴、保护意识、社区建设及公众参与的一个组成部分。因此,当地居民的态度及其期望是非常关键的因素。本文对在比利时弗兰德地区根特城市核心区工业化前的邻里关系进行了考察,并进行了大量的参与式图片调查。尽管其历史渊源相当独特,但当地居民反对退化和支持保护的动机却具有更加普遍的价值。

关键词：遗产地方身份地方意识复兴/保护比利时

Investigation of KTiOPO4 nanocrystals by means of second-harmonic light emission

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Chinese Optics Letters 2008年第1期6卷 64-67页

作者： Chunyuan Zhou Loc Le Xuan Abdallah Slablab Nicolas Sandeau Sophie Brasselet dominique Chauvat Jean-Francois Roch Laboratoire de Photonique Quantique et Moléculaire ENS Cachan UMR CNRS 8537 61 avenue du President Wilson 94235 Cachan Cedex France

The finding of nonlinear nanometric-sized probes is of key importance for the development of nonlinear microscopy in physical as well as biological sciences. We isolate nonlinear KTiOPO4 nanocrystals and study them by second-harmonic generation microscopy （SHGM） and atomic force microscopy （AFM） independently. With both polarization analysis and defocused imaging of the emitted second harmonic field, we extract the Euler angles of the crystalline axes of a single nanocrystal. A balanced coherent optical homodyne detection shows the coherent nature of the nanocrystal nonlinear emission and allows a phase measurement of the emitted second-harmonic field. These features make the KTiOPO4 nanocrystal a good candidate for a vectorial probe of electromagnetic near fields.

关键词： KTiOPO4 谐波光发射物理学

Solitary pulmonary metastasis arising thirteen years after liver transplantation for HBV-related hepatocellular carcinoma

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World Journal of Gastroenterology 2006年第30期12卷 4911-4913页

作者： Chiara Viola Tarik Asselah Didier Samuel Francois Durand Hamza Boudjema dominique Valla Patrick Marcellin Service d'Hépatologie INSERM CRB3 University of Paris VII Hpital Beaujon Clichy 92 110 France Centre Hepatobiliary UPRES 3541 Formation de recherche Claude Bernard Virus et Transplantation Universite Paris-Sud Hpital Paul Brousse Villejuif 94800 France

We described a 59-year-old male patient who underwent liver transplantation in 1989 for hepatocellular carcinoma （HCC） complicating hepatitis B virus （HBV） cirrhosis. In 2001 （12 years after liver transplantation）, he developed a lung metastasis of HCC without intrahepatic recurrence and the resection was done. In July 2003, he was symptom free without any recurrence. HCC metastasis can develop even after a very long time of liver transplantation. Many HCCs grow slowly, and the growth rate of recurrent tumors in patients receiving immunosuppressive therapy is significantly greater than that of those who do not receive immunosuppressive therapy.

关键词： Hepatitis B virus Liver transplantation Hepatocellular carcinoma Metastasis Immuno-suppression

New Caledonia Ophiolite, Marginal Rifting to Fore-arc Evolution

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Acta Geologica Sinica(English Edition) 2020年第S1期94卷 9-10页

作者： dominique CLUZEL Jonathan AITCHISON Arianna SECCHIARI Alessandra MONTANINI Delphine BOSCH Universitéde la Nouvelle-Calédonie NouméaNew Caledonia School of Earth and Environmental Sciences University of Queensland QLD 4072Australia University of Parma Parco Area delle Scienze 157/a 43124 ParmaItaly Earth Sciences Department Géosciences Montpellier UMR-CNRS 5243-Univ.Montpellier II France

The New Caledonia Ophiolite(Peridotite Nappe), represents about one third of the island’s surface(i.e. 5 500 km2). The ophiolite is composed of harzburgites, dunites, lherzolites, minor mafic-ultramafic cumulates, and various dykes and sills. The mantle section underwent a polyphase evolution, which involved prominent depletion and re-fertilization. The oldest events are probably recorded by abyssal-type lherzolites of the northern massifs, which bear traces of moderate partial melting. Plagioclase lherzolites were formed by shallow entrapment of highly depleted MORB melt in residual spinel lherzolites. Nd isotope compositions are consistent with derivation from an asthenospheric mantle source that experienced a recent MORB-producing depletion. This evolution was most likely accomplished during the late Cretaceous breakup of the eastern Australian margin. The harzburgite-dunite association, which forms the bulk of Peridotite Nappe was probably formed through a multistage magma-producing process. Harzburgites composition may have be obtained by a first phase of ~15% dry fractional melting, followed by 15%–18% hydrous melting in a supra-subduction zone setting. Variable εNd negatively correlate with 87Sr/86Sr, while Pb isotopes cover a wide range, trending from depleted mantle towards enriched, sediment-like, compositions. Such signatures likely reflect the evolution of a highly depleted forearc mantle wedge variably modified by different fluid and melt inputs during Eocene subduction. The harzburgite-dunite set is overlain by a dunite transition zone ~300 m thick, in turn discontinuously covered by cumulate lenses consisting of layered pyroxenites, dunites, and wherlites at the base and gabbronorites/websterites on top. The mafic cumulates crystallized from primitive, ultra-depleted melts in the nascent lower fore-arc crust. In particular, FME enrichments and Nd-Pb isotopes support an origin from a refractory mantle source modified by slab fluids for the gabbronorite

关键词： ophiolite supra-subduction slab fluids metasomatism

Neurocysticercosis causing sudden death:a case report

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Asian Pacific Journal of Tropical Medicine 2010年第8期3卷 669-670页

作者： Martinez Fernanda Seley Celeste Marchesi Liliana Fontanarossa Victoria Rodriguez dominique Troncoso Alcides Department of Microbiology Parasitology and Infectious DiseasesSchool of MedicineBuenos Aires University

We report an acute case of a native man from Bolivia suffered from cephalalgia which rapidly worsened and ended in his sudden and unexpected *** resonance imaging(MRI) of the brain was *** demonstrated on brain MRI scan were consistent with a diagnosis of neurocysticercosis(NCC).An autopsy showed the presence of intraventricular Taenia solium(***) cysts which caused blockage of cerebrospinal fluid and secondary *** to the increasing travel movements of people neurocysticercosis must be considered as a cause of unexplained sudden death.

关键词： Neurocysticercosis Taenia solium Sudden death