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Watt-level and spectrally flat mid-infrared supercontinuum in fluoroindate fibers

Photonics Research 2018年第6期6卷 609-613页

作者： FRANCIS THEBERGE NANCY BERUBE SAMUEL POULAIN SOLENN COXIC louis-rafael robichaud MARTIN BERNIER REAL VALLEE Defence R&D Canada Valcartier Centre Quebec G3J1X5 Canada Le Verre Fluore Campus KerLann F-35170 Bruz Brittany France Center for Optics Photonics and Lasers (COPL) Universite Laval Quebec G1V0A6 Canada

We report on infrared supercontinuum （SC） generation in step-index fluoroindate-based fiber by using an all-fiber laser source. In comparison to widely used ZBLAN fibers for high-power mid-infrared （MIR） SC generation, fluoroindate fibers have multiphoton absorption edges at significandy longer wavelengths and can sustain similar intensities. Recent developments highlighted in the present study allowed the production of fluoroindate fibers with MIR background loss of 2 dB/km, which is similar to or even better than ZBLAN fibers. By using an all-fiber picosecond laser source based on an erbium amplifier followed by a thulium power amplifier, we demonstrate the generation of 1.0 W infrared SC spanning over 2.25 octaves from 1 μm to 5 μm. The generated MIR SC also exhibits high spectral flatness with a 6 dB spectral bandwidth from 1.91 μm to 4.77 μm and an average power two orders of magnitude greater than in previous demonstrations with a similar spectral distribution.

关键词： Fiber optics infrared Nonlinear optics fibers Supercontinuum generation

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Endothelial nitric oxide synthase regulation is altered in pancreas from cirrhotic rats

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World Journal of Gastroenterology 2006年第2期12卷 228-233页

作者： Jean-louis Frossard rafael Quadri Antoine Hadengue Philippe Morel Catherine M Pastor Division de Gastroenterologie Hpitaux Universitaires de Geneve Departement de Chirurgie Hopitaux Universitaires de Geneve Laboratoire de Physiopathologie Hepatique et Imagerie Moleculaire Hpitaux Universitaires de Geneve

AIM： To determine whether biliary cirrhosis could induce pancreatic dysfunction such as modifications in endothelial nitric oxide synthase（eNOS） expression and whether the regulation of eNOS could be altered by the regulatory proteins caveolin and heat shock protein 90 （Hsp90）, as well as by the modifications of calmodulin binding to eNOS. METHODS： Immunoprecipitations and Western blotting analysis were performed in pancreas isolated from sham and cirrhotic rats. RESULTS： Pancreatic injury was minor in cirrhotic rats but eNOS expression importantly decreased with the length （and the severity） of the disease. Because coimmunoprecipitation of eNOS with both Hsp90 and caveolin similarly decreased in cirrhotic rats, eNOS activity was not modified by this mechanism. In contrast, drrhosis decreased the calmodulin binding to eNOS with a concomitant decrease in eNOS activity. CONCLUSION： In biliary cirrhosis, pancreatic injury is minor but the pancreatic nitric oxide （NO） production is significantly decreased by two mechanisms： a decreased expression of the enzyme and a decreased binding of calmodulin to eNOS.

关键词： Pancreas Biliary cirrhosis Endothelial NO synthase Caveolin Heat shock protein 90

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Tracing Water Flow and Colloidal Particles Transfer in an Unsaturated Soil

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Journal of Water Resource and Protection 2014年第7期6卷 696-709页

作者： Dieuseul Prédélus Laurent Lassabatere Artur Paiva Coutinho Cédric louis Thomas Brichart Erij Ben Slimène Thierry Winiarski rafael Angulo-Jaramillo Nano-H S.A.S. 38070 Saint Quentin Fallavier France Universidade Federal de Pernambuco Recife Brazil Université de Lyon CNRS UMR 5023 LEHNA ENTPE Vaulx-en-Velin France Universidade Federal de Pernambuco Recife Brazil

In recent years, many studies have been carried out on colloidal particle transfer in the unsaturated zone because they can be a risk to the environment either directly or as a vector of pollutants. A study was conducted on the influence of porous media structure in unsaturated conditions on colloidal particle transport. Three granular materials were set up in columns to replicate a fluvio-glacial soil from the unsaturated zone in the Lyon area (France). It is a sand, a bimodal mixture in equal proportion by weight of sand and gravel, and a fraction of bimodal mixture. Nanoparticles of silica (SiO2-Au-FluoNPs), having a hydrodynamic diameter between 50 and 60 nm, labeled by organic fluorescent molecules were used to simulate the transport of colloidal particles. A nonreactive tracer, bromide ion (Br-) at a concentration of C0,s = 10-2 M was used to determine the hydrodispersive properties of porous media. The tests were carried out first, with a solution of nanoparticles (C0,p = 0.2 g/L) and secondly, with a solution of nanoparticles and bromine. The transfer model based on fractionation of water into two phases, mobile and immobile, MIM, correctly fits the elution curves. The retention of colloidal particles is greater in the two media of bimodal particle size than that in the sand, which clearly demonstrates the role of textural heterogeneity in the retention mechanism. The increase in ionic strength produced by alimenting the columns with colloidal particle suspension in the presence of bromide, increases retention up to 25% in the sand. The total concentration profile of nanoparticles collected at the end of the experiment shows that the colloidal particles are retained primarily at the entrance of the columns. Hydrodispersive calculated parameters indicate that flow is more heterogeneous in bimodal media compared to sand.

关键词： Colloidal Particle Transport Microstructure Modeling Unsaturated Soil

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Synthesis and Biological Evaluation of a Highly Constrained Analogue of Methylthioadenosine (MTA)

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International Journal of Organic Chemistry 2012年第4期2卷 398-403页

作者： Gustavo Senra G. de Carvalho rafael Mafra de P. Dias Jean-louis Fourrey Vania L. Silva Cláudio G. Diniz Adilson D. da Silva Departamento de Parasitologia Microbiologia e Imunologia Instituto de Ciências Biológicas (ICB) Universidade Federal de Juiz de Fora Juiz de Fora-MG Brasil Departamento de Química Instituto de Ciências Exatas (ICE) Universidade Federal de Juiz de Fora Juiz de Fora-MG Brasil Institut de Chimie des Substances Naturelles Gif-sur-Yvette Cedex France

We describe the synthesis and the antibacterial evaluation 2’,N3-cyclonucleoside 3 analogue of MTA that is characterized by the presence of an additional linkage between the heterocyclic ring and the sugar moiety.

关键词： Synthesis Biological Evaluation Antibacterial Analogue Methylthioadenosine

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法律起源的经济后果(下)

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管理世界 2010年第8期26卷 153-166页

作者： rafael La Porta Florencio Lopez-de-Silanes Andrei Shleifer 刘佳达特茅斯大学塔克商学院法国北方高等商学院管理研究生院哈佛大学东北财经大学工商管理学院

5．法律起源与文化在这一部分和下面两个部分里，我们讨论对法律起源的一类批评意见：法律起源只是影响法规和结果的其他因素的代理变量。这里我们考察3个因素——文化、历史和政治。首先要强调的是，我们的立场和目的都不是要说明文化... 详细信息

5．法律起源与文化在这一部分和下面两个部分里，我们讨论对法律起源的一类批评意见：法律起源只是影响法规和结果的其他因素的代理变量。这里我们考察3个因素——文化、历史和政治。首先要强调的是，我们的立场和目的都不是要说明文化、历史或是政治对于法律和管制是不重要的。很明显这三项都是很重要的，

关键词：法律起源经济后果明文化批评意见政治历史

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RFID的未来之路大有希望——众多美国专家谈RFID

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金卡工程 2006年第4期10卷 52-56页

作者：本刊编辑部 Kevin Ashton Erik Michielsen rafael Moreno Shahram Moradpour Chantal Polsonetti Thomas Ryan louis Sirico 麻省理工学院Auto-ID中心 ABI研究公司波多黎各Cesar Castillo公司 Cleritec Systems公司 ARC咨询集团 TKR联合咨询公司

根据有关的市场预测报告, RFID(无线射频识别)的未来之路是大有希望的。据IDTechEx公司提供的最新报告估计:2006年, RFID标签的销售量几乎将达到自其被发明以来60年内的总销售量的

关键词： RFID 叉车供应链沃尔玛专家叉式装卸车货车阅读器天线标签

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