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endoscopic management of complications of chronic pancreatitis

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World Journal of Gastroenterology 2013年第42期19卷 7308-7315页

作者： jean-Marc Dumonceau Carlos Macias-Gomez Division of Gastroenterology and Hepatology Geneva University Hospital1211 GenevaSwitzerland Gastrointestinal endoscopy Unit Gastroenterology ServiceItalian Hospital1181 Buenos AiresArgentina

Pseudocysts and biliary obstructions will affect approximately one third of patients with chronic pancreatitis(CP).For CP-related,uncomplicated,pancreatic pseudocysts(PPC),endoscopy is the first-choice therapeutic *** advances have focused on endosonography-guided PPC transmural drainage,which tends to replace the conventional,duodenoscope-based coma immediately *** material is being tested to facilitate the endosonography-guided *** this review,the most adequate techniques depending on PPC characteristics are presented along with supporting *** CP-related biliary obstructions,endoscopy and surgery are valid therapeutic *** co-morbidities(e.g.,portal cavernoma)and expected patient compliance to repeat endoscopic procedures are important factors when selecting the most adapted *** should be reasonably ruled out before embarking on the endoscopic treatment of presumed CP-related biliary *** endoscopy,the gold standard technique consists of placing simultaneous,multiple,side-by-side,plastic stents for a oneyear *** covered self-expandable metal stents are challenging this method and have provided 50%mid-term success.

关键词： Biliary stricture Chronic pancreatitis Pseudocyst endoscopic retrograde cholangio-pancreatography endoscopic ultrasonography Stent

Modelling and mathematical results arising from ferromagnetic problems

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Science China Mathematics 2012年第5期55卷 1053-1067页

作者： DeSCLOUX jean FLUeCK Michel RAPPAZ Jacques Department of Mathematics Ecole Polytechnique Fdrale de Lausanne (EPFL)Lausanne 1015Switzerland

Abstract In this article, we investigate the equations of magnetostaties for a configuration where a ferromagnetic material occupies a bounded domain and is surrounded by vacuum. Furthermore, the ferromagnetic law takes the form B=μ0μr（｜H｜）Hi i.e., the magnetizing field H and the magnetic induction B are collinear, but the relative permeability μr is allowed to depend on the modulus of H. We prove the well-posedness of the magnetostatic problem under suitable convexity assumptions, and the convergence of several iterative methods, both for the original problem set in the Beppo-Levi space W1（R3）, and for a finite-dimensional approximation. The theoretical results are illustrated by numerical examples, which capture the known physical phenomena.

关键词： ferromagnetism nonlinear elliptic problems finite element methods optimisation algorithms

The Moser-Trudinger-Onofri Inequality

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Chinese Annals of Mathematics,Series B 2015年第5期36卷 777-802页

作者： jean DOLBeAULT Maria J.eSTeBAN Gaspard JANKOWIAK Ceremade CNRS UMR 7534 and Université Paris-Dauphine Place de Lattre de Tassigny

This paper is devoted to results on the Moser-Trudinger-Onofri inequality, or the Onofri inequality for brevity. In dimension two this inequality plays a role similar to that of the Sobolev inequality in higher dimensions. After justifying this statement by recovering the Onofri inequality through various limiting procedures and after reviewing some known results, the authors state several elementary *** new results are also proved in this paper. A proof of the inequality is given by using mass transportation methods(in the radial case), consistently with similar results for Sobolev inequalities. The authors investigate how duality can be used to improve the Onofri inequality, in connection with the logarithmic Hardy-Littlewood-Sobolev *** the framework of fast diffusion equations, it is established that the inequality is an entropy-entropy production inequality, which provides an integral remainder term. Finally,a proof of the inequality based on rigidity methods is given and a related nonlinear flow is introduced.

关键词： Moser-Trudinger-Onofri inequality Duality Mass transportation Fast diffusion equation Rigidity

Hybridisation on coral reefs and the conservation of evolutionary novelty

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Current Zoology 2015年第1期61卷 132-145页

作者： Zoe T. RICHARDS jean-Paul A. HOBBS Department of Aquatic Zoology Western Australian Museum Welshpool WA 6015 Australia Department of environment and Agriculture Curtin University Bentley WA 6845 Australia

Hybridisation was traditionally considered rare on coral reefs. However, a rapid increase in hybrid studies over the last 20 years has revealed that hybridisation on coral reefs is common and widespread. In this review, we summarise the growing body of evidence arising from studies on stony corals and reef fishes to verify the occurrence of hybridisatiori, and we examine the influence hybridisation has had on the enormous level of biodiversity present on coral reefs. We discuss the challenges of dis- tinguishing hybridisation from alternative hypotheses （e.g. incomplete lineage sorting）. This review also explores the evolutio- nary consequences of hybridisation, which range from increasing genetic diversity and the production of novel lineages that may outperform the parent species, to reverse speciation and extinction by genetic swamping. Instances of hybridisation can be natural or occur as a result of human impacts （e.g. habitat degradation） and distinguishing between these two very different causal me- chanisms is important for management. Currently, the legislative status of hybrids is unclear and hybrids are rarely protected in conservation programs. Failing to adequately manage hybridisation and hybrid lineages may lead to potential losses of evolutio- nary novelty, declines in phylogenetic diversity or species extinctions. To conserve existing coral reef biodiversity, and the processes that generate biodiversity, conservation policies must be re-defined and instances of hybridisation must be assessed and managed on a case-by-case basis [Current Zoology 61 （1）： 132 145, 2015].

关键词： Coral Reefs Stony Corals Reef Fish Hybridisation evolutionary Novelty extinction

Accurate surface potential determination in Schottky diodes by the use of a correlated current and capacitance voltage *** to n-InP

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Journal of Semiconductors 2011年第10期32卷 39-43页

作者： Ali Ahaitouf Abdelaziz Ahaitouf jean Paul Salvestrini Hussein Srour Laboratoire Signaux Systemes et Composants DGE Faculty of Sciences and TechnologyUniversite Sidi Mohammed Ben AbdellahP.O.Box 2202FES Morocco LIMAO Faculte polydisciplinaire de Taza Universite Sidi Mohammed Ben Abdellah de FesBP 1223 Taza-GareMorocco Laboratoire Materiaux Optiques Photonique et SystemesEA 4423Universite Paul Verlaine-MetzSupelec2 rue E.Belin57070 MetzFrance

Based on current voltage（I-Vg） and capacitance voltage（C-Vg） measurements,a reliable procedure is proposed to determine the effective surface potential Vd（Vg） in Schottky *** the framework of thermionic emission,our analysis includes both the effect of the series resistance and the ideality factor,even voltage dependent. This technique is applied to n-type indium phosphide（n-InP） Schottky diodes with and without an interfacial layer and allows us to provide an interpretation of the observed peak on the C-Vg *** study clearly shows that the depletion width and the flat band barrier height deduced from C-Vg,which are important parameters directly related to the surface potential in the semiconductor,should be estimated within our approach to obtain more reliable information.

关键词： Schottky diode interface states surface potential ideality factor barrier height capacitance voltage current measurements

effect of temperature in the conversion of methanol to olefins （MTO） using an extruded SAPO-34 catalyst

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Frontiers of Chemical Science and engineering 2018年第2期12卷 226-238页

作者： Ignacio Jorge Castellanos-Beltran Gnouyaro Palla Assima jean-Michel Lavoie Universit6 de Sherbrooke Chaire de Recherche Industrielle sur l'Ethanol Cellulosique et les Biocommodities (CRIEC-B) Sherbrooke QC Canada J1L 2Y4

The methanol-to-olefin （MTO） reaction was investigated in a bench-scale, fixed-bed reactor using an extruded catalyst composed of a commercial SAPO-34 （65 weight percentage, wt-%） embedded in an amorphous SiO2 matrix （35 wt-%）. The texture properties, acidity and crystal structure of the pure SAPO-34 and its extruded form （e-SAPO-34） were analyzed and the results indicated that the extrusion step did not affect the properties of the catalyst. Subsequently, e-SAPO-34 was tested in a temperature range between 300 and 500 ~C, using an aqueous methanol mixture （80 wt-% water content） fed at a weight hour space velocity （WHSV） of 1.21 h-1. At 300 ~C, a low conversion was observed combined with the catalyst deactivation, which was ascribed to oligomeriza-tion and condensation reactions. The coke analysis showed the presence of diamandoid hydrocarbons, which are known to be inactive molecules in the MTO process. At higher temperatures, a quasi-steady state was reached during a 6 h reaction where the optimal temperature was identified at 450℃, which incidentally led to the lowest coke deposition combined with the highest H/C ratio. Above 450℃, surges of ethylene and methane were associated to a combination of H-transfer and protolytic cracking reactions. Finally, the present work underscored the convenience of the extrusion technique for testing catalysts at simulated scale-up conditions.

关键词： MTO SAPO-34 temperature extrusion coke light alkanes

Interendoscopist variability in proximal colon polyp detection is twice higher for serrated polyps than adenomas

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World Journal of Gastroenterology 2016年第38期22卷 8549-8557页

作者： jean-François Bretagne Stéphanie Hamonic Christine Piette jean-François Viel Guillaume Bouguen Service des maladies de l'appareil digestif hopital PontchaillouCentre hospitalo-universitaire de Rennes35033 RennesFrance Service d'épidémiologie et de santé publique Centre hospitalo-universitaire de Rennes35033 Rennes France Association pour le dépistage des cancers en Ille et Vilaine 35033 RennesFrance

AIM To assess the interendoscopist variability in the detection of colorectal polyps according to their location and histological *** This study was a retrospective analysis of prospectively collected data from a regional colorectal cancer(CRC) screening program; 2979 complete colonoscopies from 18 endoscopists were included. Variability in performance between endoscopists for detection of at least one adenoma(A), one proximal adenoma(PA), one distal adenoma(DA), and one proximal serrated polyp(PSP) was assessed by using multilevel logistic regression *** The observed detection rates among the 18 endoscopists ranged from 24.6% to 47.6%(mean = 35.7%) for A, from 19.1% to 39.0%(mean = 29.4%) for DA, from 6.0% to 22.9%(mean = 12.4%) for PA, and from 1.3% to 19.3%(mean = 6.9%) for *** adjusting for patient-level variables(sex, age), the interendoscopist detection rates variability achieved a significant level for A, PA, and PSP but not for DA(P = 0.03, P = 0.02, P = 0.02 and P = 0.08, respectively). This heterogeneity, as measured by the variance partition coefficient, was approximately threefold higher for PA(6.6%) compared with A(2.1%), and twofold higher for PSP(12.3%) compared with *** These results demonstrate significant interendoscopist variability for proximal polyp particularly for serrated p o l y p s, b u t n o t f o r d i s t a l a d e n o m a d e t e c t i o n. These findings contribute to explain the decreased effectiveness of complete colonoscopies at preventing proximal CRCs and the need to carefully assess the proximal colon during scope procedure.

关键词： Colonoscopy Colorectal cancer Adenoma Serrated polyp Proximal polyp Detection rate Quality performance

Guillain-Barrésyndrome following hepatitis e

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World Journal of Gastroenterology 2009年第13期15卷 1645-1647页

作者： jean Philippe Loly estelle Rikir Maxime Seivert emile Legros Pierre Defrance Jacques Belaiche Gustave Moonen jean Delwaide Department of Hepato-Gastroenterology CHU Sart TilmanUniversitéde Liège Department of Neurology CHU Sart TilmanUniversitéde Liège General Practitioner Department of Hepato-Gastroenterology CHPLT La Tourelle

Guillain-Barrésyndrome(GBS)is often triggered by a preceding bacterial or viral ***,it has been observed in association with acute hepatitis A,B and C,and three cases have been previously described in India in which GBS was associated with acute hepatitis e.A molecular mimicry mechanism is supposed to be involved in the pathogenesis of GBS triggered by infectious agents,although the nature of the shared epitopes has not been characterized in most instances,including that in the case of hepatotropic *** report a case of GBS following acute hepatitis e in a european *** presence of antiganglioside GM2 antibodies in this patient suggested molecular mimicry involving ganglioside GM2 in the pathogenesis of GBS associated with hepatitis e.

关键词： Gangliosides Guillain-Barré syndrome Hepatitis e Molecular mimicry Viral hepatitis

Phytochemical Screening, Study of Acute Toxicity and Hypoglycemic and Antihyperglycemic Activities of Silver Nanoparticles from Guibourtia tessmannii (Harms) J. Leonard(Caesalpiniaceae)

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