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The potential value of intravascular ultrasound imaging in diagnosis of aortic intramural hematoma

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Journal of Geriatric Cardiology 2011年第4期8卷 224-229页

作者： Wei Hu Francois Schiele Nicolas Meneveau Marie-France Seronde pierre Legalery jean-Francois Bonneville Sidney Chocron jean-pierre Bassand Department of Cardiology Min Hang District Central HospitalShanghai 201100China Department of Cardiology University Hospital Jean MinjozBesançon 25000France Department of Radiology University Hospital Jean MinjozBesançon 25000France Department of Cardiac Surgery University Hospital Jean MinjozBesançon 25000France

Objective To evaluate the potential value of intravascular ultrasound(IVUS)imaging in the diagnosis of aortic intramural hematoma(AIH).Methods From September 2002 to May 2005,a consecutive series of 15 patients with suspected aortic dissection(AD)underwent both IVUS imaging and spiral computed tomography(CT).Six patients diagnosed as acute type B AIH by CT or IVUS composed the present study *** The study group consisted of five males and one female with mean age of 66 years *** of them had chest or back *** one patient,CT omitted a localized AIH and an associated penetrating atherosclerotic ulcer(PAU),which were detected by *** another patient,CT mistaken a partly thrombosed false lumen as an AIH,whereas IVUS detected a subtle intimal tear and slow moving blood in the false *** the four rest patients,both CT and IVUS made the diagnosis of AIH,however,IVUS detected three PAUs in three of them,only one of them was also detected by CT,and two of them escaped initial CT and were confirmed by follow up CT or magnetic resonance *** IVUS imaging is a safe examination and has high accuracy in the diagnosis of AIH,particularly for diagnosing localized AIH,distinguishing AIH with thrombosed classic AD and detecting accompanied small PAUs.

关键词： intravascular ultrasound diagnosis aortic intramural hematom

Preliminary investigation of late Mughal period wall paintings from historic monuments of Begumpura,Lahore

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Frontiers of Architectural Research 2018年第4期7卷 465-472页

作者： Saima Gulzar jean-pierre Burg Department of Architecture University of Management and TechnologyLahore 54770Pakistan Swiss Federal Institute of Technology Zurich Geological InstituteNO E 67Sonneggstrasse 5CH-8092 ZurichSwitzerland

Deterioration of wall paintings caused by environmental pollution is a worldwide problem especially with reference to the present industrial era. The alarming incremental trend of pollution in Pakistan has threatened the cultural assets. The deposition of pollutants on historic fabric is the main source of chemical and mineralogical alterations of wall paintings. The present diagnostic study investigated the main deterioration mechanisms affecting wall paintings of the late Mughal period, in the Begumpura Complex, in Lahore. Micro samples were characterized by XRD and SEM-EDS to identify deterioration products and understand deterioration mechanisms prevalent at the heritage site. The results revealed that red ocher, green earth and calcium carbonate were initially used for red, green and white pigments, respectively. Sodium chloride (halite, NaCl) and gypsum (CaSO4·2H2O) were identified as the main deterioration products.

关键词： Deterioration Wall Painting Begumpura Lahore

Methane-to-chemicals:a pathway to decarbonization

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National Science Review 2023年第9期10卷 56-71页

作者： Nikolai Nesterenko Izabel C.Medeiros-Costa Edwin B.Clatworthy Hugo Cruchade Stanislav V.Konnov jean-pierre Dath jean-pierre Gilson Svetlana Mintova Total Energies One Tech Belgium Zone Industrielle C Laboratoire Catalyse et Spectrochimie(LCS) ENSICAENCNRSNormandie Université

The utilization of methane for chemical production,often considered as the future of petrochemistry,historically could not compete economically with conventional processes due to higher investment *** sustainability and decarbonization of the downstream industry by integration with a methane-to-chemicals process may provide an opportunity to unlock the future for these ***-to-chemicals is an efficient tool to boost the decarbonization potential of renewable *** the current implementation of carbon capture utilization and storage(CCUS) technologies is of great importance for industrial decarbonization,a shift to greener CO2-free processes and CO2utilization from external sources for manufacturing valuable goods is highly *** review outlines potential options for how a methane-to-chemicals process could support decarbonization of the downstream industry.

关键词： methane chemicals pathways decarbonization

Optimal Control of Hepatitis B in a sub-Saharan African rural area

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Applied Mathematics(A Journal of Chinese Universities) 2023年第4期38卷 523-544页

作者： jean pierre II KOUENKAM Joseph MBANG Gilbert CHENDJOU Yves EMVUDU Department of Mathematics Faculty of ScienceUniversity of Yaounde IP.O.Box 812 YaoundeCameroon

In this paper,we ameliorate the model proposed in[13],by incorporating the influence of hepatitis B e antigen(HBeAg)status of mothers on vertical *** use the improved model to fit reported HBV new infections in the Zhejiang Province of *** to predict the course of the Hepatitis B(HBV)infection in this Chinese area,and in Tokombere,located in sub-Saharan Africa(SSA).Furthermore,we apply optimal control techniques in view to re-examine the effects of the newborn vaccination,the universal vaccination and the treatment of chronic carriers in preventing the HBV *** results show that treatment slightly steps in the optimal strategy,while immunisation is an effective *** the other hand,they indicate that the control measures and immunization programs implemented in Zhejiang Province are ***,they suggest that in SSA,a package of several policies centred on birth dose vaccination should be implemented.

关键词： hepatitis B virus chronic carriers vaccine treatment Pontryagin

Synthesis and purification of long copper nanowires. Application to high performance flexible transparent electrodes with and without PEDOT：PSS

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Nano Research 2014年第3期7卷 315-324页

作者： Celine Mayousse Caroline Celle Alexandre Carella jean-pierre Simonato CEA LITEN / DTNM / LCRE 17 rue des Martyrs 38054 Grenoble France

We demonstrate the hydrothermal synthesis of long copper nanowires based on a simple protocol. We show that the purification of the nanowires is very important and can be achieved easily by wet treatment with glacial acetic acid. Fabrication of random networks of purified copper nanowires leads to flexible transparent electrodes with excellent optoelectronic performances （e.g., 55 Ω/sq. at 94% transparency）. The process is carried out at room temperature and no post-treatment is necessary. Hybrid materials with the conductive polymer PEDOT：PSS show similar properties （e.g., 46 Ω/sq, at 93% transparency）, with improved mechanical properties. Both electrodes were integrated in capacitive touch sensors.

关键词： copper nanowires transparent electrodes PEDOT:PSS touch sensor metallic nanowires

Hydraulic and mechanical properties of wax-coated sands

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Journal of Central South University 2013年第12期20卷 3667-3675页

作者： Jesmani Mehrab Bardet jean-pierre Jabbari Nima Kamalzare Mehrad Department of Civil Engineering Imam Khomeini International University Sonny Astani Department of Civil and Environmental Engineering Viterbi School of Engineering Department of Civil and Environmental Engineering Rensselaer Polytechnic Institute

Wax-coated sands are a new category of synthetic soils, which are gradually becoming a reliable construction material. Because of their valuable drainage ability and mechanical properties, wax coated sandy soils are specifically applicable to pavement construction of horseracing tracks and sport fields. Although the mechanical and hydraulic properties of these synthetic soils are well-proven, there is still a lack of studies on how the soil samples behave differently when mixing with different wax fractions. Adding the wax affects permeability and compressibility of pure sand. Intensity of influences is a function of weight percentage of wax that has been added, and other physical and environmental factors. The effects of wax content on hydraulic properties(permeability), and mechanical properties(stress strain behavior, compressibility) of sandy soils based on a series of experimental efforts were investigated. Obtained experimental results infer that increasing the amount of wax up to 6% causes an about 50% increase in permeability, mainly because of the significant effect of wax in lowering the friction along with covering and filling the angular parts of particles' surfaces and forming rounded particles. In addition, wax-coated sands show a 20% to 60% decrease in confined compression modulus compared to non wax-coated sands.

关键词： wax-coated sand confined compression coefficient permeability compressibility stress-strain behavior

A 3D Numerical Study of LO_2/GH_2 Supercritical Combustion in the ONERA-Mascotte Test-rig Configuration

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Journal of Thermal Science 2016年第1期25卷 97-108页

作者： Abdelkrim Benmansour Abdelkrim Liazid pierre-Olivier Logerais jean-Félix Durastanti Laboratory LTE ENP-OranBP 1523 El Mnaouer 31000Oran Algeria Universite de Paris-Est CERTESIUT de Senartrue Georges Charpak77567 LieusaintFrance

Cryogenic propellants LOx/H2 are used at very high pressure in rocket engine combustion. The description of the combustion process in such application is very complex due essentially to the supercritical regime. Ideal gas law becomes invalid. In order to try to capture the average characteristics of this combustion process, numerical computations are performed using a model based on a one-phase multi-component approach. Such work requires fluid properties and a correct definition of the mixture behavior generally described by cubic equations of state with appropriated thermodynamic relations validated against the NIST data. In this study we consider an alternative way to get the effect of real gas by testing the volume-weighted-mixing-law with association of the component transport properties using directly the NIST library data fitting including the supercritical regime range. The numerical simulations are carried out using 3D RANS approach associated with two tested turbulence models, the standard k-Epsilon model and the realizable k-Epsilon one. The combustion model is also associated with two chemical reaction mechanisms. The first one is a one-step generic chemical reaction and the second one is a two-step chemical reaction. The obtained results like temperature profiles, recirculation zones, visible flame lengths and distributions of OH species are discussed.

关键词： Rocket engine non-premixed combustion supercritical regime H2-O2 flame transport properties

Orexin/hypocretinin in multiple sclerosis and experimental autoimmune encephalomyelitis

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Neural Regeneration Research 2020年第6期15卷 1039-1040页

作者： jean pierre Pallais Catherine M.Kotz Milos Stanojlovic Integrative Biology and Physiology University of MinnesotaMinneapolisMNUSA(Pallais JPKotz CMStanojlovic M)Minneapolis VA Health Care SystemGeriatric ResearchEducation and Clinical CenterMinneapolisMNUSA(Kotz CM)

Multiple sclerosis(MS)is a T-cell-mediated autoimmune disease of the central nervous system(CNS).Worldwide,more than 2.3 million people are diagnosed with *** its clinical manifestations appear typically in the third and fourth decades of life,MS is a major cause of neurological disability in young adults and has wide health,psychological,economic,and social *** are three key pathological features of MS:inflammation;demyelination and oligodendrocyte loss;axonal loss and *** are two main hypotheses regarding mechanisms of MS ***“outside-in”concept is an older,widely recognized hypothesis that describes neurodegeneration as a consequence of inflammatory induced demyelination,which is caused by immune system activation(Lassmann et al.,2012).Mechanisms of T-cell mediated myelin destruction are extensively studied,but the manner by which the immune system perceives myelin as foreign.

关键词： autoimmune sclerosis inflammation

Flocculation and magnetically-assisted sedimentation of size-sorted beidellite platelets mixed with maghemite nanoparticles

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Nano Research 2020年第11期13卷 3001-3011页

作者： Sofia Housni Sébastien Abramson jean-Michel Guigner pierre Levitz Laurent Michot Laboratoire de PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX(PHENIX UMR 8234 Sorbonne Université-CNRS)Sorbonne UniversitéParis75252France Institut de Minéralogie de Physique des Matériaux et de Cosmochimie(IMPMC UMR 7590Sorbonne Université-IRD-CNRS-MNHN)Sorbonne UniversitéParis75252France

In this study,the flocculation and the subsequent decantation step of mixed suspensions of 10 nm-sizedγ-Fe_(2)O_(3) magnetic nanoparticles and 500 nm-sized beidellite clay platelets was *** work may find application in the field of water treatment,specifically the flocculation processes with magnetically assisted *** a short description of the preparation and characterization of the raw materials(nanoparticles and clays),the influence of several parameters(pH,concentrations of nanoparticles and clays etc.)on the amount of flocculated materials was examined,which gave information on the concentration ranges allowing a complete flocculation,together with a better understanding on the interactions between nanoparticles and clays responsible for *** optimal conditions for magnetically assisted settling were then determined by comparing for each sample sedimentation velocities under gravity and in the presence of a Nd-Fe-B ***,the complex multiscale structure of the flocs in water was explored,through the measurement of several bulk properties(zeta-potential and volume measurements,laser granulometry),while the organization of the materials at a microscopic scale was investigated by cryo-transmission electron microscopy(cryo-TEM)and small-angle X-ray scattering(SAXS).

关键词： magnetic separation nanoparticles clay flocculation decantation characterization